I tried to restore the desktop environment by typing from a virtual console: sudo apt-get purge nvidia* sudo apt-get install nvidia-331 nvidia-prime Since then, I'm able to login into lightdm only by booting in failsafe mode at grub menu, but one odd thing is the lame nvidia-settings window shown in the attached picture. Also, the file /etc/X11/xorg.conf is now missing. I also tried to select the intel card with the command: sudo prime-select intel but then I get plenty of errors in kernel.log: Sep 17 21:08:24 Work kernel: [ 60.878559] ------------[ cut here ]------------ Sep 17 21:08:24 Work kernel: [ 60.878591] WARNING: CPU: 5 PID: 198 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_pm.c:5873 i915_release_power_well+0x5a/0x60 [i915]() Sep 17 21:08:24 Work kernel: [ 60.878592] Modules linked in: pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) xt_tcpudp xt_conntrack nf_conntrack_irc nf_conntrack_ftp xt_state xt_limit xt_LOG nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack iptable_filter ip_tables x_tables rfcomm bnep nls_iso8859_1 lp nvidia(POX) joydev uvcvideo hid_logitech_dj videobuf2_vmalloc videobuf2_memops videobuf2_core usbhid snd_hda_codec_hdmi hid videodev snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm ath3k arc4 btusb dell_wmi snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq ath9k bluetooth snd_seq_device sparse_keymap snd_timer ath9k_common ath9k_hw ppdev x86_pkg_temp_thermal ath snd mac80211 intel_powerclamp coretemp dell_laptop e1000e dcdbas cfg80211 kvm_intel mei_me kvm psmouse parport_pc parport mei ptp sdhci_pci pps_core sdhci wmi serio_raw mac_hid lpc_ich crct10dif_pclmul crc32_pclmul soundcore ghash_clmulni_intel dm_crypt i915 aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd i2c_algo_bit ahci drm_kms_helper libahci drm video Sep 17 21:08:24 Work kernel: [ 60.878626] CPU: 5 PID: 198 Comm: kworker/u16:4 Tainted: P W OX 3.13.0-36-generic #63-Ubuntu Sep 17 21:08:24 Work kernel: [ 60.878628] Hardware name: Dell Inc. Precision M4800/0T3YTY, BIOS A06 01/02/2014 Sep 17 21:08:24 Work kernel: [ 60.878634] Workqueue: hd-audio0 hda_power_work [snd_hda_codec] Sep 17 21:08:24 Work kernel: [ 60.878635] 0000000000000009 ffff880424fcdc00 ffffffff8171e569 0000000000000000 Sep 17 21:08:24 Work kernel: [ 60.878637] ffff880424fcdc38 ffffffff8106775d 0000000000000000 ffffffffa06579c0 Sep 17 21:08:24 Work kernel: [ 60.878639] ffffffff813a81d0 0000000000000000 ffff880427ddd098 ffff880424fcdc48 Sep 17 21:08:24 Work kernel: [ 60.878641] Call Trace: Sep 17 21:08:24 Work kernel: [ 60.878645] [] dump_stack+0x45/0x56 Sep 17 21:08:24 Work kernel: [ 60.878648] [] warn_slowpath_common+0x7d/0xa0 Sep 17 21:08:24 Work kernel: [ 60.878651] [] ? pci_legacy_suspend_late+0xf0/0xf0 Sep 17 21:08:24 Work kernel: [ 60.878653] [] warn_slowpath_null+0x1a/0x20 Sep 17 21:08:24 Work kernel: [ 60.878665] [] i915_release_power_well+0x5a/0x60 [i915] Sep 17 21:08:24 Work kernel: [ 60.878669] [] hda_display_power+0x28/0x40 [snd_hda_intel] Sep 17 21:08:24 Work kernel: [ 60.878672] [] azx_runtime_suspend+0x8f/0xb0 [snd_hda_intel] Sep 17 21:08:24 Work kernel: [ 60.878674] [] pci_pm_runtime_suspend+0x61/0x140 Sep 17 21:08:24 Work kernel: [ 60.878676] [] ? pci_legacy_suspend_late+0xf0/0xf0 Sep 17 21:08:24 Work kernel: [ 60.878679] [] __rpm_callback+0x36/0xc0 Sep 17 21:08:24 Work kernel: [ 60.878682] [] ? azx_get_response+0xfb/0x320 [snd_hda_intel] Sep 17 21:08:24 Work kernel: [ 60.878684] [] rpm_callback+0x24/0x80 Sep 17 21:08:24 Work kernel: [ 60.878685] [] rpm_suspend+0x126/0x6e0 Sep 17 21:08:24 Work kernel: [ 60.878688] [] ? __wake_up+0x44/0x50 Sep 17 21:08:24 Work kernel: [ 60.878690] [] rpm_idle+0xd6/0x2b0 Sep 17 21:08:24 Work kernel: [ 60.878692] [] __pm_runtime_idle+0x5d/0x80 Sep 17 21:08:24 Work kernel: [ 60.878694] [] azx_power_notify+0x2d/0x40 [snd_hda_intel] Sep 17 21:08:24 Work kernel: [ 60.878699] [] hda_power_work+0x9e/0xa0 [snd_hda_codec] Sep 17 21:08:24 Work kernel: [ 60.878702] [] process_one_work+0x182/0x450 Sep 17 21:08:24 Work kernel: [ 60.878704] [] worker_thread+0x121/0x410 Sep 17 21:08:24 Work kernel: [ 60.878706] [] ? rescuer_thread+0x430/0x430 Sep 17 21:08:24 Work kernel: [ 60.878708] [] kthread+0xd2/0xf0 Sep 17 21:08:24 Work kernel: [ 60.878710] [] ? kthread_create_on_node+0x1c0/0x1c0 Sep 17 21:08:24 Work kernel: [ 60.878711] [] ret_from_fork+0x7c/0xb0 Sep 17 21:08:24 Work kernel: [ 60.878713] [] ? kthread_create_on_node+0x1c0/0x1c0 Sep 17 21:08:24 Work kernel: [ 60.878714] ---[ end trace 0c8355f729ce11db ]--- Sep 17 21:08:48 Work kernel: [ 85.657529] ------------[ cut here ]------------ Sep 17 21:08:48 Work kernel: [ 85.657562] WARNING: CPU: 2 PID: 2799 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_pm.c:5856 i915_request_power_well+0x77/0x80 [i915]() Sep 17 21:08:48 Work kernel: [ 85.657563] Modules linked in: pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) xt_tcpudp xt_conntrack nf_conntrack_irc nf_conntrack_ftp xt_state xt_limit xt_LOG nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack iptable_filter ip_tables x_tables rfcomm bnep nls_iso8859_1 lp nvidia(POX) joydev uvcvideo hid_logitech_dj videobuf2_vmalloc videobuf2_memops videobuf2_core usbhid snd_hda_codec_hdmi hid videodev snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm ath3k arc4 btusb dell_wmi snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq ath9k bluetooth snd_seq_device sparse_keymap snd_timer ath9k_common ath9k_hw ppdev x86_pkg_temp_thermal ath snd mac80211 intel_powerclamp coretemp dell_laptop e1000e dcdbas cfg80211 kvm_intel mei_me kvm psmouse parport_pc parport mei ptp sdhci_pci pps_core sdhci wmi serio_raw mac_hid lpc_ich crct10dif_pclmul crc32_pclmul soundcore ghash_clmulni_intel dm_crypt i915 aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd i2c_algo_bit ahci drm_kms_helper libahci drm video Sep 17 21:08:48 Work kernel: [ 85.657600] CPU: 2 PID: 2799 Comm: pulseaudio Tainted: P W OX 3.13.0-36-generic #63-Ubuntu Sep 17 21:08:48 Work kernel: [ 85.657601] Hardware name: Dell Inc. Precision M4800/0T3YTY, BIOS A06 01/02/2014 Sep 17 21:08:48 Work kernel: [ 85.657602] 0000000000000009 ffff8800b1eb58d8 ffffffff8171e569 0000000000000000 Sep 17 21:08:48 Work kernel: [ 85.657605] ffff8800b1eb5910 ffffffff8106775d 0000000000000000 ffff88042510e800 Sep 17 21:08:48 Work kernel: [ 85.657607] ffffffffa06579c0 ffff880427d86c00 0000000000000004 ffff8800b1eb5920 Sep 17 21:08:48 Work kernel: [ 85.657609] Call Trace: Sep 17 21:08:48 Work kernel: [ 85.657613] [] dump_stack+0x45/0x56 Sep 17 21:08:48 Work kernel: [ 85.657616] [] warn_slowpath_common+0x7d/0xa0 Sep 17 21:08:48 Work kernel: [ 85.657619] [] warn_slowpath_null+0x1a/0x20 Sep 17 21:08:48 Work kernel: [ 85.657631] [] i915_request_power_well+0x77/0x80 [i915] Sep 17 21:08:48 Work kernel: [ 85.657635] [] hda_display_power+0x32/0x40 [snd_hda_intel] Sep 17 21:08:48 Work kernel: [ 85.657638] [] azx_runtime_resume+0x11a/0x150 [snd_hda_intel] Sep 17 21:08:48 Work kernel: [ 85.657643] [] pci_pm_runtime_resume+0x7b/0xc0 Sep 17 21:08:48 Work kernel: [ 85.657646] [] ? pci_restore_standard_config+0x40/0x40 Sep 17 21:08:48 Work kernel: [ 85.657648] [] __rpm_callback+0x36/0xc0 Sep 17 21:08:48 Work kernel: [ 85.657650] [] rpm_callback+0x24/0x80 Sep 17 21:08:48 Work kernel: [ 85.657652] [] rpm_resume+0x4de/0x6d0 Sep 17 21:08:48 Work kernel: [ 85.657654] [] __pm_runtime_resume+0x4f/0x80 Sep 17 21:08:48 Work kernel: [ 85.657657] [] azx_power_notify+0x35/0x40 [snd_hda_intel] Sep 17 21:08:48 Work kernel: [ 85.657663] [] snd_hda_power_save+0x24e/0x270 [snd_hda_codec] Sep 17 21:08:48 Work kernel: [ 85.657665] [] azx_pcm_open+0x261/0x450 [snd_hda_intel] Sep 17 21:08:48 Work kernel: [ 85.657670] [] snd_pcm_open_substream+0x59/0x110 [snd_pcm] Sep 17 21:08:48 Work kernel: [ 85.657673] [] snd_pcm_open+0xb2/0x250 [snd_pcm] Sep 17 21:08:48 Work kernel: [ 85.657676] [] ? wake_up_state+0x20/0x20 Sep 17 21:08:48 Work kernel: [ 85.657680] [] snd_pcm_playback_open+0x40/0x60 [snd_pcm] Sep 17 21:08:48 Work kernel: [ 85.657684] [] snd_open+0xb4/0x190 [snd] Sep 17 21:08:48 Work kernel: [ 85.657687] [] chrdev_open+0x9f/0x1d0 Sep 17 21:08:48 Work kernel: [ 85.657689] [] do_dentry_open+0x233/0x2e0 Sep 17 21:08:48 Work kernel: [ 85.657691] [] ? cdev_put+0x30/0x30 Sep 17 21:08:48 Work kernel: [ 85.657692] [] vfs_open+0x49/0x50 Sep 17 21:08:48 Work kernel: [ 85.657695] [] do_last+0x554/0x1200 Sep 17 21:08:48 Work kernel: [ 85.657698] [] ? apparmor_file_alloc_security+0x5b/0x180 Sep 17 21:08:48 Work kernel: [ 85.657700] [] path_openat+0xbb/0x640 Sep 17 21:08:48 Work kernel: [ 85.657703] [] ? __wake_up+0x44/0x50 Sep 17 21:08:48 Work kernel: [ 85.657705] [] do_filp_open+0x3a/0x90 Sep 17 21:08:48 Work kernel: [ 85.657708] [] ? __alloc_fd+0xa7/0x130 Sep 17 21:08:48 Work kernel: [ 85.657710] [] do_sys_open+0x129/0x280 Sep 17 21:08:48 Work kernel: [ 85.657712] [] SyS_open+0x1e/0x20 Sep 17 21:08:48 Work kernel: [ 85.657714] [] system_call_fastpath+0x1a/0x1f Sep 17 21:08:48 Work kernel: [ 85.657715] ---[ end trace 0c8355f729ce11dc ]--- Sep 17 21:09:15 Work kernel: [ 112.119992] ------------[ cut here ]------------ Sep 17 21:09:15 Work kernel: [ 112.120023] WARNING: CPU: 1 PID: 197 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_pm.c:5873 i915_release_power_well+0x5a/0x60 [i915]() Sep 17 21:09:15 Work kernel: [ 112.120024] Modules linked in: pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) xt_tcpudp xt_conntrack nf_conntrack_irc nf_conntrack_ftp xt_state xt_limit xt_LOG nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack iptable_filter ip_tables x_tables rfcomm bnep nls_iso8859_1 lp nvidia(POX) joydev uvcvideo hid_logitech_dj videobuf2_vmalloc videobuf2_memops videobuf2_core usbhid snd_hda_codec_hdmi hid videodev snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm ath3k arc4 btusb dell_wmi snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq ath9k bluetooth snd_seq_device sparse_keymap snd_timer ath9k_common ath9k_hw ppdev x86_pkg_temp_thermal ath snd mac80211 intel_powerclamp coretemp dell_laptop e1000e dcdbas cfg80211 kvm_intel mei_me kvm psmouse parport_pc parport mei ptp sdhci_pci pps_core sdhci wmi serio_raw mac_hid lpc_ich crct10dif_pclmul crc32_pclmul soundcore ghash_clmulni_intel dm_crypt i915 aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd i2c_algo_bit ahci drm_kms_helper libahci drm video Sep 17 21:09:15 Work kernel: [ 112.120058] CPU: 1 PID: 197 Comm: kworker/u16:3 Tainted: P W OX 3.13.0-36-generic #63-Ubuntu Sep 17 21:09:15 Work kernel: [ 112.120060] Hardware name: Dell Inc. Precision M4800/0T3YTY, BIOS A06 01/02/2014 Sep 17 21:09:15 Work kernel: [ 112.120067] Workqueue: hd-audio0 hda_power_work [snd_hda_codec] Sep 17 21:09:15 Work kernel: [ 112.120068] 0000000000000009 ffff880424e5bc00 ffffffff8171e569 0000000000000000 Sep 17 21:09:15 Work kernel: [ 112.120070] ffff880424e5bc38 ffffffff8106775d 0000000000000000 ffffffffa06579c0 Sep 17 21:09:15 Work kernel: [ 112.120072] ffffffff813a81d0 0000000000000000 ffff880427ddd098 ffff880424e5bc48 Sep 17 21:09:15 Work kernel: [ 112.120073] Call Trace: Sep 17 21:09:15 Work kernel: [ 112.120077] [] dump_stack+0x45/0x56 Sep 17 21:09:15 Work kernel: [ 112.120080] [] warn_slowpath_common+0x7d/0xa0 Sep 17 21:09:15 Work kernel: [ 112.120086] [] ? pci_legacy_suspend_late+0xf0/0xf0 Sep 17 21:09:15 Work kernel: [ 112.120087] [] warn_slowpath_null+0x1a/0x20 Sep 17 21:09:15 Work kernel: [ 112.120113] [] i915_release_power_well+0x5a/0x60 [i915] Sep 17 21:09:15 Work kernel: [ 112.120117] [] hda_display_power+0x28/0x40 [snd_hda_intel] Sep 17 21:09:15 Work kernel: [ 112.120120] [] azx_runtime_suspend+0x8f/0xb0 [snd_hda_intel] Sep 17 21:09:15 Work kernel: [ 112.120122] [] pci_pm_runtime_suspend+0x61/0x140 Sep 17 21:09:15 Work kernel: [ 112.120125] [] ? pci_legacy_suspend_late+0xf0/0xf0 Sep 17 21:09:15 Work kernel: [ 112.120127] [] __rpm_callback+0x36/0xc0 Sep 17 21:09:15 Work kernel: [ 112.120130] [] ? azx_get_response+0xfb/0x320 [snd_hda_intel] Sep 17 21:09:15 Work kernel: [ 112.120132] [] rpm_callback+0x24/0x80 Sep 17 21:09:15 Work kernel: [ 112.120134] [] rpm_suspend+0x126/0x6e0 Sep 17 21:09:15 Work kernel: [ 112.120137] [] ? __wake_up+0x44/0x50 Sep 17 21:09:15 Work kernel: [ 112.120139] [] rpm_idle+0xd6/0x2b0 Sep 17 21:09:15 Work kernel: [ 112.120141] [] __pm_runtime_idle+0x5d/0x80 Sep 17 21:09:15 Work kernel: [ 112.120144] [] azx_power_notify+0x2d/0x40 [snd_hda_intel] Sep 17 21:09:15 Work kernel: [ 112.120149] [] hda_power_work+0x9e/0xa0 [snd_hda_codec] Sep 17 21:09:15 Work kernel: [ 112.120151] [] process_one_work+0x182/0x450 Sep 17 21:09:15 Work kernel: [ 112.120154] [] worker_thread+0x121/0x410 Sep 17 21:09:15 Work kernel: [ 112.120156] [] ? rescuer_thread+0x430/0x430 Sep 17 21:09:15 Work kernel: [ 112.120158] [] kthread+0xd2/0xf0 Sep 17 21:09:15 Work kernel: [ 112.120160] [] ? kthread_create_on_node+0x1c0/0x1c0 Sep 17 21:09:15 Work kernel: [ 112.120162] [] ret_from_fork+0x7c/0xb0 Sep 17 21:09:15 Work kernel: [ 112.120164] [] ? kthread_create_on_node+0x1c0/0x1c0 Sep 17 21:09:15 Work kernel: [ 112.120166] ---[ end trace 0c8355f729ce11dd ]--- Sep 17 21:09:24 Work kernel: [ 121.584518] ------------[ cut here ]------------ Sep 17 21:09:24 Work kernel: [ 121.584556] WARNING: CPU: 1 PID: 3072 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_pm.c:5856 i915_request_power_well+0x77/0x80 [i915]() Sep 17 21:09:24 Work kernel: [ 121.584558] Modules linked in: pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) xt_tcpudp xt_conntrack nf_conntrack_irc nf_conntrack_ftp xt_state xt_limit xt_LOG nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack iptable_filter ip_tables x_tables rfcomm bnep nls_iso8859_1 lp nvidia(POX) joydev uvcvideo hid_logitech_dj videobuf2_vmalloc videobuf2_memops videobuf2_core usbhid snd_hda_codec_hdmi hid videodev snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm ath3k arc4 btusb dell_wmi snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq ath9k bluetooth snd_seq_device sparse_keymap snd_timer ath9k_common ath9k_hw ppdev x86_pkg_temp_thermal ath snd mac80211 intel_powerclamp coretemp dell_laptop e1000e dcdbas cfg80211 kvm_intel mei_me kvm psmouse parport_pc parport mei ptp sdhci_pci pps_core sdhci wmi serio_raw mac_hid lpc_ich crct10dif_pclmul crc32_pclmul soundcore ghash_clmulni_intel dm_crypt i915 aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd i2c_algo_bit ahci drm_kms_helper libahci drm video Sep 17 21:09:24 Work kernel: [ 121.584605] CPU: 1 PID: 3072 Comm: pulseaudio Tainted: P W OX 3.13.0-36-generic #63-Ubuntu Sep 17 21:09:24 Work kernel: [ 121.584607] Hardware name: Dell Inc. Precision M4800/0T3YTY, BIOS A06 01/02/2014 Sep 17 21:09:24 Work kernel: [ 121.584608] 0000000000000009 ffff8800b1f598d8 ffffffff8171e569 0000000000000000 Sep 17 21:09:24 Work kernel: [ 121.584612] ffff8800b1f59910 ffffffff8106775d 0000000000000000 ffff88042510e800 Sep 17 21:09:24 Work kernel: [ 121.584614] ffffffffa06579c0 ffff880427d86c00 0000000000000004 ffff8800b1f59920 Sep 17 21:09:24 Work kernel: [ 121.584617] Call Trace: Sep 17 21:09:24 Work kernel: [ 121.584622] [] dump_stack+0x45/0x56 Sep 17 21:09:24 Work kernel: [ 121.584626] [] warn_slowpath_common+0x7d/0xa0 Sep 17 21:09:24 Work kernel: [ 121.584629] [] warn_slowpath_null+0x1a/0x20 Sep 17 21:09:24 Work kernel: [ 121.584647] [] i915_request_power_well+0x77/0x80 [i915] Sep 17 21:09:24 Work kernel: [ 121.584652] [] hda_display_power+0x32/0x40 [snd_hda_intel] Sep 17 21:09:24 Work kernel: [ 121.584656] [] azx_runtime_resume+0x11a/0x150 [snd_hda_intel] Sep 17 21:09:24 Work kernel: [ 121.584661] [] pci_pm_runtime_resume+0x7b/0xc0 Sep 17 21:09:24 Work kernel: [ 121.584664] [] ? pci_restore_standard_config+0x40/0x40 Sep 17 21:09:24 Work kernel: [ 121.584668] [] __rpm_callback+0x36/0xc0 Sep 17 21:09:24 Work kernel: [ 121.584670] [] rpm_callback+0x24/0x80 Sep 17 21:09:24 Work kernel: [ 121.584673] [] rpm_resume+0x4de/0x6d0 Sep 17 21:09:24 Work kernel: [ 121.584676] [] __pm_runtime_resume+0x4f/0x80 Sep 17 21:09:24 Work kernel: [ 121.584679] [] azx_power_notify+0x35/0x40 [snd_hda_intel] Sep 17 21:09:24 Work kernel: [ 121.584687] [] snd_hda_power_save+0x24e/0x270 [snd_hda_codec] Sep 17 21:09:24 Work kernel: [ 121.584691] [] azx_pcm_open+0x261/0x450 [snd_hda_intel] Sep 17 21:09:24 Work kernel: [ 121.584697] [] snd_pcm_open_substream+0x59/0x110 [snd_pcm] Sep 17 21:09:24 Work kernel: [ 121.584701] [] snd_pcm_open+0xb2/0x250 [snd_pcm] Sep 17 21:09:24 Work kernel: [ 121.584705] [] ? wake_up_state+0x20/0x20 Sep 17 21:09:24 Work kernel: [ 121.584710] [] snd_pcm_playback_open+0x40/0x60 [snd_pcm] Sep 17 21:09:24 Work kernel: [ 121.584716] [] snd_open+0xb4/0x190 [snd] Sep 17 21:09:24 Work kernel: [ 121.584720] [] chrdev_open+0x9f/0x1d0 Sep 17 21:09:24 Work kernel: [ 121.584723] [] do_dentry_open+0x233/0x2e0 Sep 17 21:09:24 Work kernel: [ 121.584725] [] ? cdev_put+0x30/0x30 Sep 17 21:09:24 Work kernel: [ 121.584727] [] vfs_open+0x49/0x50 Sep 17 21:09:24 Work kernel: [ 121.584730] [] do_last+0x554/0x1200 Sep 17 21:09:24 Work kernel: [ 121.584734] [] ? apparmor_file_alloc_security+0x5b/0x180 Sep 17 21:09:24 Work kernel: [ 121.584737] [] path_openat+0xbb/0x640 Sep 17 21:09:24 Work kernel: [ 121.584740] [] ? fsnotify_put_event+0x5a/0x90 Sep 17 21:09:24 Work kernel: [ 121.584744] [] ? kmem_cache_alloc_trace+0x1c6/0x1f0 Sep 17 21:09:24 Work kernel: [ 121.584747] [] do_filp_open+0x3a/0x90 Sep 17 21:09:24 Work kernel: [ 121.584750] [] ? __alloc_fd+0xa7/0x130 Sep 17 21:09:24 Work kernel: [ 121.584753] [] do_sys_open+0x129/0x280 Sep 17 21:09:24 Work kernel: [ 121.584756] [] SyS_open+0x1e/0x20 Sep 17 21:09:24 Work kernel: [ 121.584758] [] system_call_fastpath+0x1a/0x1f Sep 17 21:09:24 Work kernel: [ 121.584760] ---[ end trace 0c8355f729ce11de ]--- Sep 17 21:09:30 Work kernel: [ 127.738363] ------------[ cut here ]------------ Sep 17 21:09:30 Work kernel: [ 127.738447] WARNING: CPU: 3 PID: 198 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_pm.c:5873 i915_release_power_well+0x5a/0x60 [i915]() Sep 17 21:09:30 Work kernel: [ 127.738451] Modules linked in: pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) xt_tcpudp xt_conntrack nf_conntrack_irc nf_conntrack_ftp xt_state xt_limit xt_LOG nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack iptable_filter ip_tables x_tables rfcomm bnep nls_iso8859_1 lp nvidia(POX) joydev uvcvideo hid_logitech_dj videobuf2_vmalloc videobuf2_memops videobuf2_core usbhid snd_hda_codec_hdmi hid videodev snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm ath3k arc4 btusb dell_wmi snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq ath9k bluetooth snd_seq_device sparse_keymap snd_timer ath9k_common ath9k_hw ppdev x86_pkg_temp_thermal ath snd mac80211 intel_powerclamp coretemp dell_laptop e1000e dcdbas cfg80211 kvm_intel mei_me kvm psmouse parport_pc parport mei ptp sdhci_pci pps_core sdhci wmi serio_raw mac_hid lpc_ich crct10dif_pclmul crc32_pclmul soundcore ghash_clmulni_intel dm_crypt i915 aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd i2c_algo_bit ahci drm_kms_helper libahci drm video Sep 17 21:09:30 Work kernel: [ 127.738565] CPU: 3 PID: 198 Comm: kworker/u16:4 Tainted: P W OX 3.13.0-36-generic #63-Ubuntu Sep 17 21:09:30 Work kernel: [ 127.738569] Hardware name: Dell Inc. Precision M4800/0T3YTY, BIOS A06 01/02/2014 Sep 17 21:09:30 Work kernel: [ 127.738589] Workqueue: hd-audio0 hda_power_work [snd_hda_codec] Sep 17 21:09:30 Work kernel: [ 127.738593] 0000000000000009 ffff880424fcdc00 ffffffff8171e569 0000000000000000 Sep 17 21:09:30 Work kernel: [ 127.738601] ffff880424fcdc38 ffffffff8106775d 0000000000000000 ffffffffa06579c0 Sep 17 21:09:30 Work kernel: [ 127.738607] ffffffff813a81d0 0000000000000000 ffff880427ddd098 ffff880424fcdc48 Sep 17 21:09:30 Work kernel: [ 127.738614] Call Trace: Sep 17 21:09:30 Work kernel: [ 127.738626] [] dump_stack+0x45/0x56 Sep 17 21:09:30 Work kernel: [ 127.738634] [] warn_slowpath_common+0x7d/0xa0 Sep 17 21:09:30 Work kernel: [ 127.738646] [] ? pci_legacy_suspend_late+0xf0/0xf0 Sep 17 21:09:30 Work kernel: [ 127.738652] [] warn_slowpath_null+0x1a/0x20 Sep 17 21:09:30 Work kernel: [ 127.738696] [] i915_release_power_well+0x5a/0x60 [i915] Sep 17 21:09:30 Work kernel: [ 127.738708] [] hda_display_power+0x28/0x40 [snd_hda_intel] Sep 17 21:09:30 Work kernel: [ 127.738716] [] azx_runtime_suspend+0x8f/0xb0 [snd_hda_intel] Sep 17 21:09:30 Work kernel: [ 127.738725] [] pci_pm_runtime_suspend+0x61/0x140 Sep 17 21:09:30 Work kernel: [ 127.738732] [] ? pci_legacy_suspend_late+0xf0/0xf0 Sep 17 21:09:30 Work kernel: [ 127.738741] [] __rpm_callback+0x36/0xc0 Sep 17 21:09:30 Work kernel: [ 127.738750] [] ? azx_get_response+0xfb/0x320 [snd_hda_intel] Sep 17 21:09:30 Work kernel: [ 127.738756] [] rpm_callback+0x24/0x80 Sep 17 21:09:30 Work kernel: [ 127.738763] [] rpm_suspend+0x126/0x6e0 Sep 17 21:09:30 Work kernel: [ 127.738772] [] ? __wake_up+0x44/0x50 Sep 17 21:09:30 Work kernel: [ 127.738778] [] rpm_idle+0xd6/0x2b0 Sep 17 21:09:30 Work kernel: [ 127.738784] [] __pm_runtime_idle+0x5d/0x80 Sep 17 21:09:30 Work kernel: [ 127.738793] [] azx_power_notify+0x2d/0x40 [snd_hda_intel] Sep 17 21:09:30 Work kernel: [ 127.738809] [] hda_power_work+0x9e/0xa0 [snd_hda_codec] Sep 17 21:09:30 Work kernel: [ 127.738817] [] process_one_work+0x182/0x450 Sep 17 21:09:30 Work kernel: [ 127.738824] [] worker_thread+0x121/0x410 Sep 17 21:09:30 Work kernel: [ 127.738831] [] ? rescuer_thread+0x430/0x430 Sep 17 21:09:30 Work kernel: [ 127.738838] [] kthread+0xd2/0xf0 Sep 17 21:09:30 Work kernel: [ 127.738844] [] ? kthread_create_on_node+0x1c0/0x1c0 Sep 17 21:09:30 Work kernel: [ 127.738850] [] ret_from_fork+0x7c/0xb0 Sep 17 21:09:30 Work kernel: [ 127.738856] [] ? kthread_create_on_node+0x1c0/0x1c0 Sep 17 21:09:30 Work kernel: [ 127.738860] ---[ end trace 0c8355f729ce11df ]--- Sep 17 21:22:31 Work kernel: [ 907.843739] ------------[ cut here ]------------ Sep 17 21:22:31 Work kernel: [ 907.843770] WARNING: CPU: 4 PID: 2823 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_pm.c:5856 i915_request_power_well+0x77/0x80 [i915]() Sep 17 21:22:31 Work kernel: [ 907.843772] Modules linked in: pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) xt_tcpudp xt_conntrack nf_conntrack_irc nf_conntrack_ftp xt_state xt_limit xt_LOG nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack iptable_filter ip_tables x_tables rfcomm bnep nls_iso8859_1 lp nvidia(POX) joydev uvcvideo hid_logitech_dj videobuf2_vmalloc videobuf2_memops videobuf2_core usbhid snd_hda_codec_hdmi hid videodev snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm ath3k arc4 btusb dell_wmi snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq ath9k bluetooth snd_seq_device sparse_keymap snd_timer ath9k_common ath9k_hw ppdev x86_pkg_temp_thermal ath snd mac80211 intel_powerclamp coretemp dell_laptop e1000e dcdbas cfg80211 kvm_intel mei_me kvm psmouse parport_pc parport mei ptp sdhci_pci pps_core sdhci wmi serio_raw mac_hid lpc_ich crct10dif_pclmul crc32_pclmul soundcore ghash_clmulni_intel dm_crypt i915 aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd i2c_algo_bit ahci drm_kms_helper libahci drm video Sep 17 21:22:31 Work kernel: [ 907.843818] CPU: 4 PID: 2823 Comm: alsa-sink-HDMI Tainted: P W OX 3.13.0-36-generic #63-Ubuntu Sep 17 21:22:31 Work kernel: [ 907.843820] Hardware name: Dell Inc. Precision M4800/0T3YTY, BIOS A06 01/02/2014 Sep 17 21:22:31 Work kernel: [ 907.843822] 0000000000000009 ffff880401ddb8d8 ffffffff8171e569 0000000000000000 Sep 17 21:22:31 Work kernel: [ 907.843825] ffff880401ddb910 ffffffff8106775d 0000000000000000 ffff88042510e800 Sep 17 21:22:31 Work kernel: [ 907.843827] ffffffffa06579c0 ffff880427d86c00 0000000000000004 ffff880401ddb920 Sep 17 21:22:31 Work kernel: [ 907.843829] Call Trace: Sep 17 21:22:31 Work kernel: [ 907.843833] [] dump_stack+0x45/0x56 Sep 17 21:22:31 Work kernel: [ 907.843837] [] warn_slowpath_common+0x7d/0xa0 Sep 17 21:22:31 Work kernel: [ 907.843839] [] warn_slowpath_null+0x1a/0x20 Sep 17 21:22:31 Work kernel: [ 907.843861] [] i915_request_power_well+0x77/0x80 [i915] Sep 17 21:22:31 Work kernel: [ 907.843864] [] hda_display_power+0x32/0x40 [snd_hda_intel] Sep 17 21:22:31 Work kernel: [ 907.843867] [] azx_runtime_resume+0x11a/0x150 [snd_hda_intel] Sep 17 21:22:31 Work kernel: [ 907.843870] [] pci_pm_runtime_resume+0x7b/0xc0 Sep 17 21:22:31 Work kernel: [ 907.843872] [] ? pci_restore_standard_config+0x40/0x40 Sep 17 21:22:31 Work kernel: [ 907.843875] [] __rpm_callback+0x36/0xc0 Sep 17 21:22:31 Work kernel: [ 907.843877] [] rpm_callback+0x24/0x80 Sep 17 21:22:31 Work kernel: [ 907.843878] [] rpm_resume+0x4de/0x6d0 Sep 17 21:22:31 Work kernel: [ 907.843880] [] __pm_runtime_resume+0x4f/0x80 Sep 17 21:22:31 Work kernel: [ 907.843883] [] azx_power_notify+0x35/0x40 [snd_hda_intel] Sep 17 21:22:31 Work kernel: [ 907.843900] [] snd_hda_power_save+0x24e/0x270 [snd_hda_codec] Sep 17 21:22:31 Work kernel: [ 907.843904] [] azx_pcm_open+0x261/0x450 [snd_hda_intel] Sep 17 21:22:31 Work kernel: [ 907.843909] [] snd_pcm_open_substream+0x59/0x110 [snd_pcm] Sep 17 21:22:31 Work kernel: [ 907.843912] [] snd_pcm_open+0xb2/0x250 [snd_pcm] Sep 17 21:22:31 Work kernel: [ 907.843915] [] ? wake_up_state+0x20/0x20 Sep 17 21:22:31 Work kernel: [ 907.843919] [] snd_pcm_playback_open+0x40/0x60 [snd_pcm] Sep 17 21:22:31 Work kernel: [ 907.843934] [] snd_open+0xb4/0x190 [snd] Sep 17 21:22:31 Work kernel: [ 907.843937] [] chrdev_open+0x9f/0x1d0 Sep 17 21:22:31 Work kernel: [ 907.843939] [] do_dentry_open+0x233/0x2e0 Sep 17 21:22:31 Work kernel: [ 907.843940] [] ? cdev_put+0x30/0x30 Sep 17 21:22:31 Work kernel: [ 907.843942] [] vfs_open+0x49/0x50 Sep 17 21:22:31 Work kernel: [ 907.843944] [] do_last+0x554/0x1200 Sep 17 21:22:31 Work kernel: [ 907.843947] [] ? apparmor_file_alloc_security+0x5b/0x180 Sep 17 21:22:31 Work kernel: [ 907.843949] [] path_openat+0xbb/0x640 Sep 17 21:22:31 Work kernel: [ 907.843953] [] ? kmem_cache_alloc_trace+0x1c6/0x1f0 Sep 17 21:22:31 Work kernel: [ 907.843955] [] do_filp_open+0x3a/0x90 Sep 17 21:22:31 Work kernel: [ 907.843957] [] ? __alloc_fd+0xa7/0x130 Sep 17 21:22:31 Work kernel: [ 907.843959] [] do_sys_open+0x129/0x280 Sep 17 21:22:31 Work kernel: [ 907.843961] [] SyS_open+0x1e/0x20 Sep 17 21:22:31 Work kernel: [ 907.843963] [] system_call_fastpath+0x1a/0x1f Sep 17 21:22:31 Work kernel: [ 907.843964] ---[ end trace 0c8355f729ce11e0 ]--- Sep 17 21:22:50 Work kernel: [ 927.320842] ------------[ cut here ]------------ Sep 17 21:22:50 Work kernel: [ 927.320925] WARNING: CPU: 2 PID: 198 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_pm.c:5873 i915_release_power_well+0x5a/0x60 [i915]() Sep 17 21:22:50 Work kernel: [ 927.320929] Modules linked in: pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) xt_tcpudp xt_conntrack nf_conntrack_irc nf_conntrack_ftp xt_state xt_limit xt_LOG nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack iptable_filter ip_tables x_tables rfcomm bnep nls_iso8859_1 lp nvidia(POX) joydev uvcvideo hid_logitech_dj videobuf2_vmalloc videobuf2_memops videobuf2_core usbhid snd_hda_codec_hdmi hid videodev snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm ath3k arc4 btusb dell_wmi snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq ath9k bluetooth snd_seq_device sparse_keymap snd_timer ath9k_common ath9k_hw ppdev x86_pkg_temp_thermal ath snd mac80211 intel_powerclamp coretemp dell_laptop e1000e dcdbas cfg80211 kvm_intel mei_me kvm psmouse parport_pc parport mei ptp sdhci_pci pps_core sdhci wmi serio_raw mac_hid lpc_ich crct10dif_pclmul crc32_pclmul soundcore ghash_clmulni_intel dm_crypt i915 aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd i2c_algo_bit ahci drm_kms_helper libahci drm video Sep 17 21:22:50 Work kernel: [ 927.321039] CPU: 2 PID: 198 Comm: kworker/u16:4 Tainted: P W OX 3.13.0-36-generic #63-Ubuntu Sep 17 21:22:50 Work kernel: [ 927.321043] Hardware name: Dell Inc. Precision M4800/0T3YTY, BIOS A06 01/02/2014 Sep 17 21:22:50 Work kernel: [ 927.321062] Workqueue: hd-audio0 hda_power_work [snd_hda_codec] Sep 17 21:22:50 Work kernel: [ 927.321066] 0000000000000009 ffff880424fcdc00 ffffffff8171e569 0000000000000000 Sep 17 21:22:50 Work kernel: [ 927.321078] ffff880424fcdc38 ffffffff8106775d 0000000000000000 ffffffffa06579c0 Sep 17 21:22:50 Work kernel: [ 927.321088] ffffffff813a81d0 0000000000000000 ffff880427ddd098 ffff880424fcdc48 Sep 17 21:22:50 Work kernel: [ 927.321098] Call Trace: Sep 17 21:22:50 Work kernel: [ 927.321111] [] dump_stack+0x45/0x56 Sep 17 21:22:50 Work kernel: [ 927.321121] [] warn_slowpath_common+0x7d/0xa0 Sep 17 21:22:50 Work kernel: [ 927.321134] [] ? pci_legacy_suspend_late+0xf0/0xf0 Sep 17 21:22:50 Work kernel: [ 927.321142] [] warn_slowpath_null+0x1a/0x20 Sep 17 21:22:50 Work kernel: [ 927.321184] [] i915_release_power_well+0x5a/0x60 [i915] Sep 17 21:22:50 Work kernel: [ 927.321198] [] hda_display_power+0x28/0x40 [snd_hda_intel] Sep 17 21:22:50 Work kernel: [ 927.321208] [] azx_runtime_suspend+0x8f/0xb0 [snd_hda_intel] Sep 17 21:22:50 Work kernel: [ 927.321218] [] pci_pm_runtime_suspend+0x61/0x140 Sep 17 21:22:50 Work kernel: [ 927.321227] [] ? pci_legacy_suspend_late+0xf0/0xf0 Sep 17 21:22:50 Work kernel: [ 927.321237] [] __rpm_callback+0x36/0xc0 Sep 17 21:22:50 Work kernel: [ 927.321249] [] ? azx_get_response+0xfb/0x320 [snd_hda_intel] Sep 17 21:22:50 Work kernel: [ 927.321257] [] rpm_callback+0x24/0x80 Sep 17 21:22:50 Work kernel: [ 927.321265] [] rpm_suspend+0x126/0x6e0 Sep 17 21:22:50 Work kernel: [ 927.321275] [] ? __wake_up+0x44/0x50 Sep 17 21:22:50 Work kernel: [ 927.321283] [] rpm_idle+0xd6/0x2b0 Sep 17 21:22:50 Work kernel: [ 927.321291] [] __pm_runtime_idle+0x5d/0x80 Sep 17 21:22:50 Work kernel: [ 927.321302] [] azx_power_notify+0x2d/0x40 [snd_hda_intel] Sep 17 21:22:50 Work kernel: [ 927.321318] [] hda_power_work+0x9e/0xa0 [snd_hda_codec] Sep 17 21:22:50 Work kernel: [ 927.321328] [] process_one_work+0x182/0x450 Sep 17 21:22:50 Work kernel: [ 927.321336] [] worker_thread+0x121/0x410 Sep 17 21:22:50 Work kernel: [ 927.321344] [] ? rescuer_thread+0x430/0x430 Sep 17 21:22:50 Work kernel: [ 927.321352] [] kthread+0xd2/0xf0 Sep 17 21:22:50 Work kernel: [ 927.321360] [] ? kthread_create_on_node+0x1c0/0x1c0 Sep 17 21:22:50 Work kernel: [ 927.321367] [] ret_from_fork+0x7c/0xb0 Sep 17 21:22:50 Work kernel: [ 927.321375] [] ? kthread_create_on_node+0x1c0/0x1c0 Sep 17 21:22:50 Work kernel: [ 927.321379] ---[ end trace 0c8355f729ce11e1 ]--- Sep 17 21:23:46 Work kernel: [ 982.820600] ------------[ cut here ]------------ Sep 17 21:23:46 Work kernel: [ 982.820631] WARNING: CPU: 4 PID: 2823 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_pm.c:5856 i915_request_power_well+0x77/0x80 [i915]() Sep 17 21:23:46 Work kernel: [ 982.820632] Modules linked in: pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) xt_tcpudp xt_conntrack nf_conntrack_irc nf_conntrack_ftp xt_state xt_limit xt_LOG nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack iptable_filter ip_tables x_tables rfcomm bnep nls_iso8859_1 lp nvidia(POX) joydev uvcvideo hid_logitech_dj videobuf2_vmalloc videobuf2_memops videobuf2_core usbhid snd_hda_codec_hdmi hid videodev snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm ath3k arc4 btusb dell_wmi snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq ath9k bluetooth snd_seq_device sparse_keymap snd_timer ath9k_common ath9k_hw ppdev x86_pkg_temp_thermal ath snd mac80211 intel_powerclamp coretemp dell_laptop e1000e dcdbas cfg80211 kvm_intel mei_me kvm psmouse parport_pc parport mei ptp sdhci_pci pps_core sdhci wmi serio_raw mac_hid lpc_ich crct10dif_pclmul crc32_pclmul soundcore ghash_clmulni_intel dm_crypt i915 aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd i2c_algo_bit ahci drm_kms_helper libahci drm video Sep 17 21:23:46 Work kernel: [ 982.820663] CPU: 4 PID: 2823 Comm: alsa-sink-HDMI Tainted: P W OX 3.13.0-36-generic #63-Ubuntu Sep 17 21:23:46 Work kernel: [ 982.820665] Hardware name: Dell Inc. Precision M4800/0T3YTY, BIOS A06 01/02/2014 Sep 17 21:23:46 Work kernel: [ 982.820666] 0000000000000009 ffff880401ddb8d8 ffffffff8171e569 0000000000000000 Sep 17 21:23:46 Work kernel: [ 982.820668] ffff880401ddb910 ffffffff8106775d 0000000000000000 ffff88042510e800 Sep 17 21:23:46 Work kernel: [ 982.820670] ffffffffa06579c0 ffff880427d86c00 0000000000000004 ffff880401ddb920 Sep 17 21:23:46 Work kernel: [ 982.820671] Call Trace: Sep 17 21:23:46 Work kernel: [ 982.820676] [] dump_stack+0x45/0x56 Sep 17 21:23:46 Work kernel: [ 982.820679] [] warn_slowpath_common+0x7d/0xa0 Sep 17 21:23:46 Work kernel: [ 982.820681] [] warn_slowpath_null+0x1a/0x20 Sep 17 21:23:46 Work kernel: [ 982.820703] [] i915_request_power_well+0x77/0x80 [i915] Sep 17 21:23:46 Work kernel: [ 982.820707] [] hda_display_power+0x32/0x40 [snd_hda_intel] Sep 17 21:23:46 Work kernel: [ 982.820710] [] azx_runtime_resume+0x11a/0x150 [snd_hda_intel] Sep 17 21:23:46 Work kernel: [ 982.820713] [] pci_pm_runtime_resume+0x7b/0xc0 Sep 17 21:23:46 Work kernel: [ 982.820716] [] ? pci_restore_standard_config+0x40/0x40 Sep 17 21:23:46 Work kernel: [ 982.820718] [] __rpm_callback+0x36/0xc0 Sep 17 21:23:46 Work kernel: [ 982.820720] [] rpm_callback+0x24/0x80 Sep 17 21:23:46 Work kernel: [ 982.820722] [] rpm_resume+0x4de/0x6d0 Sep 17 21:23:46 Work kernel: [ 982.820724] [] __pm_runtime_resume+0x4f/0x80 Sep 17 21:23:46 Work kernel: [ 982.820727] [] azx_power_notify+0x35/0x40 [snd_hda_intel] Sep 17 21:23:46 Work kernel: [ 982.820733] [] snd_hda_power_save+0x24e/0x270 [snd_hda_codec] Sep 17 21:23:46 Work kernel: [ 982.820736] [] azx_pcm_open+0x261/0x450 [snd_hda_intel] Sep 17 21:23:46 Work kernel: [ 982.820741] [] snd_pcm_open_substream+0x59/0x110 [snd_pcm] Sep 17 21:23:46 Work kernel: [ 982.820744] [] snd_pcm_open+0xb2/0x250 [snd_pcm] Sep 17 21:23:46 Work kernel: [ 982.820747] [] ? wake_up_state+0x20/0x20 Sep 17 21:23:46 Work kernel: [ 982.820751] [] snd_pcm_playback_open+0x40/0x60 [snd_pcm] Sep 17 21:23:46 Work kernel: [ 982.820756] [] snd_open+0xb4/0x190 [snd] Sep 17 21:23:46 Work kernel: [ 982.820760] [] chrdev_open+0x9f/0x1d0 Sep 17 21:23:46 Work kernel: [ 982.820762] [] do_dentry_open+0x233/0x2e0 Sep 17 21:23:46 Work kernel: [ 982.820763] [] ? cdev_put+0x30/0x30 Sep 17 21:23:46 Work kernel: [ 982.820765] [] vfs_open+0x49/0x50 Sep 17 21:23:46 Work kernel: [ 982.820767] [] do_last+0x554/0x1200 Sep 17 21:23:46 Work kernel: [ 982.820771] [] ? apparmor_file_alloc_security+0x5b/0x180 Sep 17 21:23:46 Work kernel: [ 982.820773] [] path_openat+0xbb/0x640 Sep 17 21:23:46 Work kernel: [ 982.820777] [] ? kmem_cache_alloc_trace+0x1c6/0x1f0 Sep 17 21:23:46 Work kernel: [ 982.820779] [] do_filp_open+0x3a/0x90 Sep 17 21:23:46 Work kernel: [ 982.820781] [] ? __alloc_fd+0xa7/0x130 Sep 17 21:23:46 Work kernel: [ 982.820783] [] do_sys_open+0x129/0x280 Sep 17 21:23:46 Work kernel: [ 982.820785] [] SyS_open+0x1e/0x20 Sep 17 21:23:46 Work kernel: [ 982.820788] [] system_call_fastpath+0x1a/0x1f Sep 17 21:23:46 Work kernel: [ 982.820789] ---[ end trace 0c8355f729ce11e2 ]--- Sep 17 21:23:52 Work kernel: [ 988.850538] ------------[ cut here ]------------ Sep 17 21:23:52 Work kernel: [ 988.850615] WARNING: CPU: 2 PID: 197 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_pm.c:5873 i915_release_power_well+0x5a/0x60 [i915]() Sep 17 21:23:52 Work kernel: [ 988.850619] Modules linked in: pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) xt_tcpudp xt_conntrack nf_conntrack_irc nf_conntrack_ftp xt_state xt_limit xt_LOG nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack iptable_filter ip_tables x_tables rfcomm bnep nls_iso8859_1 lp nvidia(POX) joydev uvcvideo hid_logitech_dj videobuf2_vmalloc videobuf2_memops videobuf2_core usbhid snd_hda_codec_hdmi hid videodev snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm ath3k arc4 btusb dell_wmi snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq ath9k bluetooth snd_seq_device sparse_keymap snd_timer ath9k_common ath9k_hw ppdev x86_pkg_temp_thermal ath snd mac80211 intel_powerclamp coretemp dell_laptop e1000e dcdbas cfg80211 kvm_intel mei_me kvm psmouse parport_pc parport mei ptp sdhci_pci pps_core sdhci wmi serio_raw mac_hid lpc_ich crct10dif_pclmul crc32_pclmul soundcore ghash_clmulni_intel dm_crypt i915 aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd i2c_algo_bit ahci drm_kms_helper libahci drm video Sep 17 21:23:52 Work kernel: [ 988.850729] CPU: 2 PID: 197 Comm: kworker/u16:3 Tainted: P W OX 3.13.0-36-generic #63-Ubuntu Sep 17 21:23:52 Work kernel: [ 988.850733] Hardware name: Dell Inc. Precision M4800/0T3YTY, BIOS A06 01/02/2014 Sep 17 21:23:52 Work kernel: [ 988.850752] Workqueue: hd-audio0 hda_power_work [snd_hda_codec] Sep 17 21:23:52 Work kernel: [ 988.850756] 0000000000000009 ffff880424e5bc00 ffffffff8171e569 0000000000000000 Sep 17 21:23:52 Work kernel: [ 988.850768] ffff880424e5bc38 ffffffff8106775d 0000000000000000 ffffffffa06579c0 Sep 17 21:23:52 Work kernel: [ 988.850777] ffffffff813a81d0 0000000000000000 ffff880427ddd098 ffff880424e5bc48 Sep 17 21:23:52 Work kernel: [ 988.850787] Call Trace: Sep 17 21:23:52 Work kernel: [ 988.850799] [] dump_stack+0x45/0x56 Sep 17 21:23:52 Work kernel: [ 988.850809] [] warn_slowpath_common+0x7d/0xa0 Sep 17 21:23:52 Work kernel: [ 988.850824] [] ? pci_legacy_suspend_late+0xf0/0xf0 Sep 17 21:23:52 Work kernel: [ 988.850832] [] warn_slowpath_null+0x1a/0x20 Sep 17 21:23:52 Work kernel: [ 988.850874] [] i915_release_power_well+0x5a/0x60 [i915] Sep 17 21:23:52 Work kernel: [ 988.850887] [] hda_display_power+0x28/0x40 [snd_hda_intel] Sep 17 21:23:52 Work kernel: [ 988.850899] [] azx_runtime_suspend+0x8f/0xb0 [snd_hda_intel] Sep 17 21:23:52 Work kernel: [ 988.850909] [] pci_pm_runtime_suspend+0x61/0x140 Sep 17 21:23:52 Work kernel: [ 988.850918] [] ? pci_legacy_suspend_late+0xf0/0xf0 Sep 17 21:23:52 Work kernel: [ 988.850928] [] __rpm_callback+0x36/0xc0 Sep 17 21:23:52 Work kernel: [ 988.850939] [] ? azx_get_response+0xfb/0x320 [snd_hda_intel] Sep 17 21:23:52 Work kernel: [ 988.850947] [] rpm_callback+0x24/0x80 Sep 17 21:23:52 Work kernel: [ 988.850954] [] rpm_suspend+0x126/0x6e0 Sep 17 21:23:52 Work kernel: [ 988.850965] [] ? __wake_up+0x44/0x50 Sep 17 21:23:52 Work kernel: [ 988.850972] [] rpm_idle+0xd6/0x2b0 Sep 17 21:23:52 Work kernel: [ 988.850980] [] __pm_runtime_idle+0x5d/0x80 Sep 17 21:23:52 Work kernel: [ 988.850991] [] azx_power_notify+0x2d/0x40 [snd_hda_intel] Sep 17 21:23:52 Work kernel: [ 988.851008] [] hda_power_work+0x9e/0xa0 [snd_hda_codec] Sep 17 21:23:52 Work kernel: [ 988.851017] [] process_one_work+0x182/0x450 Sep 17 21:23:52 Work kernel: [ 988.851027] [] worker_thread+0x121/0x410 Sep 17 21:23:52 Work kernel: [ 988.851035] [] ? rescuer_thread+0x430/0x430 Sep 17 21:23:52 Work kernel: [ 988.851043] [] kthread+0xd2/0xf0 Sep 17 21:23:52 Work kernel: [ 988.851051] [] ? kthread_create_on_node+0x1c0/0x1c0 Sep 17 21:23:52 Work kernel: [ 988.851058] [] ret_from_fork+0x7c/0xb0 Sep 17 21:23:52 Work kernel: [ 988.851065] [] ? kthread_create_on_node+0x1c0/0x1c0 Sep 17 21:23:52 Work kernel: [ 988.851069] ---[ end trace 0c8355f729ce11e3 ]--- Sep 17 21:24:57 Work kernel: [ 1053.770862] ------------[ cut here ]------------ Sep 17 21:24:57 Work kernel: [ 1053.770901] WARNING: CPU: 4 PID: 2823 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_pm.c:5856 i915_request_power_well+0x77/0x80 [i915]() Sep 17 21:24:57 Work kernel: [ 1053.770903] Modules linked in: pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) xt_tcpudp xt_conntrack nf_conntrack_irc nf_conntrack_ftp xt_state xt_limit xt_LOG nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack iptable_filter ip_tables x_tables rfcomm bnep nls_iso8859_1 lp nvidia(POX) joydev uvcvideo hid_logitech_dj videobuf2_vmalloc videobuf2_memops videobuf2_core usbhid snd_hda_codec_hdmi hid videodev snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm ath3k arc4 btusb dell_wmi snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq ath9k bluetooth snd_seq_device sparse_keymap snd_timer ath9k_common ath9k_hw ppdev x86_pkg_temp_thermal ath snd mac80211 intel_powerclamp coretemp dell_laptop e1000e dcdbas cfg80211 kvm_intel mei_me kvm psmouse parport_pc parport mei ptp sdhci_pci pps_core sdhci wmi serio_raw mac_hid lpc_ich crct10dif_pclmul crc32_pclmul soundcore ghash_clmulni_intel dm_crypt i915 aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd i2c_algo_bit ahci drm_kms_helper libahci drm video Sep 17 21:24:57 Work kernel: [ 1053.770950] CPU: 4 PID: 2823 Comm: alsa-sink-HDMI Tainted: P W OX 3.13.0-36-generic #63-Ubuntu Sep 17 21:24:57 Work kernel: [ 1053.770952] Hardware name: Dell Inc. Precision M4800/0T3YTY, BIOS A06 01/02/2014 Sep 17 21:24:57 Work kernel: [ 1053.770953] 0000000000000009 ffff880401ddb8d8 ffffffff8171e569 0000000000000000 Sep 17 21:24:57 Work kernel: [ 1053.770957] ffff880401ddb910 ffffffff8106775d 0000000000000000 ffff88042510e800 Sep 17 21:24:57 Work kernel: [ 1053.770959] ffffffffa06579c0 ffff880427d86c00 0000000000000004 ffff880401ddb920 Sep 17 21:24:57 Work kernel: [ 1053.770962] Call Trace: Sep 17 21:24:57 Work kernel: [ 1053.770967] [] dump_stack+0x45/0x56 Sep 17 21:24:57 Work kernel: [ 1053.770971] [] warn_slowpath_common+0x7d/0xa0 Sep 17 21:24:57 Work kernel: [ 1053.770975] [] warn_slowpath_null+0x1a/0x20 Sep 17 21:24:57 Work kernel: [ 1053.770992] [] i915_request_power_well+0x77/0x80 [i915] Sep 17 21:24:57 Work kernel: [ 1053.770997] [] hda_display_power+0x32/0x40 [snd_hda_intel] Sep 17 21:24:57 Work kernel: [ 1053.771001] [] azx_runtime_resume+0x11a/0x150 [snd_hda_intel] Sep 17 21:24:57 Work kernel: [ 1053.771006] [] pci_pm_runtime_resume+0x7b/0xc0 Sep 17 21:24:57 Work kernel: [ 1053.771009] [] ? pci_restore_standard_config+0x40/0x40 Sep 17 21:24:57 Work kernel: [ 1053.771013] [] __rpm_callback+0x36/0xc0 Sep 17 21:24:57 Work kernel: [ 1053.771016] [] rpm_callback+0x24/0x80 Sep 17 21:24:57 Work kernel: [ 1053.771019] [] rpm_resume+0x4de/0x6d0 Sep 17 21:24:57 Work kernel: [ 1053.771022] [] __pm_runtime_resume+0x4f/0x80 Sep 17 21:24:57 Work kernel: [ 1053.771026] [] azx_power_notify+0x35/0x40 [snd_hda_intel] Sep 17 21:24:57 Work kernel: [ 1053.771034] [] snd_hda_power_save+0x24e/0x270 [snd_hda_codec] Sep 17 21:24:57 Work kernel: [ 1053.771038] [] azx_pcm_open+0x261/0x450 [snd_hda_intel] Sep 17 21:24:57 Work kernel: [ 1053.771044] [] snd_pcm_open_substream+0x59/0x110 [snd_pcm] Sep 17 21:24:57 Work kernel: [ 1053.771050] [] snd_pcm_open+0xb2/0x250 [snd_pcm] Sep 17 21:24:57 Work kernel: [ 1053.771053] [] ? wake_up_state+0x20/0x20 Sep 17 21:24:57 Work kernel: [ 1053.771058] [] snd_pcm_playback_open+0x40/0x60 [snd_pcm] Sep 17 21:24:57 Work kernel: [ 1053.771065] [] snd_open+0xb4/0x190 [snd] Sep 17 21:24:57 Work kernel: [ 1053.771069] [] chrdev_open+0x9f/0x1d0 Sep 17 21:24:57 Work kernel: [ 1053.771073] [] do_dentry_open+0x233/0x2e0 Sep 17 21:24:57 Work kernel: [ 1053.771075] [] ? cdev_put+0x30/0x30 Sep 17 21:24:57 Work kernel: [ 1053.771078] [] vfs_open+0x49/0x50 Sep 17 21:24:57 Work kernel: [ 1053.771081] [] do_last+0x554/0x1200 Sep 17 21:24:57 Work kernel: [ 1053.771085] [] ? apparmor_file_alloc_security+0x5b/0x180 Sep 17 21:24:57 Work kernel: [ 1053.771088] [] path_openat+0xbb/0x640 Sep 17 21:24:57 Work kernel: [ 1053.771094] [] ? kmem_cache_alloc_trace+0x1c6/0x1f0 Sep 17 21:24:57 Work kernel: [ 1053.771096] [] do_filp_open+0x3a/0x90 Sep 17 21:24:57 Work kernel: [ 1053.771101] [] ? __alloc_fd+0xa7/0x130 Sep 17 21:24:57 Work kernel: [ 1053.771104] [] do_sys_open+0x129/0x280 Sep 17 21:24:57 Work kernel: [ 1053.771106] [] SyS_open+0x1e/0x20 Sep 17 21:24:57 Work kernel: [ 1053.771109] [] system_call_fastpath+0x1a/0x1f Sep 17 21:24:57 Work kernel: [ 1053.771111] ---[ end trace 0c8355f729ce11e4 ]--- Sep 17 21:25:09 Work kernel: [ 1065.426812] ------------[ cut here ]------------ Sep 17 21:25:09 Work kernel: [ 1065.426894] WARNING: CPU: 2 PID: 198 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_pm.c:5873 i915_release_power_well+0x5a/0x60 [i915]() Sep 17 21:25:09 Work kernel: [ 1065.426898] Modules linked in: pci_stub vboxpci(OX) vboxnetadp(OX) vboxnetflt(OX) vboxdrv(OX) xt_tcpudp xt_conntrack nf_conntrack_irc nf_conntrack_ftp xt_state xt_limit xt_LOG nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack iptable_filter ip_tables x_tables rfcomm bnep nls_iso8859_1 lp nvidia(POX) joydev uvcvideo hid_logitech_dj videobuf2_vmalloc videobuf2_memops videobuf2_core usbhid snd_hda_codec_hdmi hid videodev snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm ath3k arc4 btusb dell_wmi snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq ath9k bluetooth snd_seq_device sparse_keymap snd_timer ath9k_common ath9k_hw ppdev x86_pkg_temp_thermal ath snd mac80211 intel_powerclamp coretemp dell_laptop e1000e dcdbas cfg80211 kvm_intel mei_me kvm psmouse parport_pc parport mei ptp sdhci_pci pps_core sdhci wmi serio_raw mac_hid lpc_ich crct10dif_pclmul crc32_pclmul soundcore ghash_clmulni_intel dm_crypt i915 aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd i2c_algo_bit ahci drm_kms_helper libahci drm video Sep 17 21:25:09 Work kernel: [ 1065.427008] CPU: 2 PID: 198 Comm: kworker/u16:4 Tainted: P W OX 3.13.0-36-generic #63-Ubuntu Sep 17 21:25:09 Work kernel: [ 1065.427012] Hardware name: Dell Inc. Precision M4800/0T3YTY, BIOS A06 01/02/2014 Sep 17 21:25:09 Work kernel: [ 1065.427031] Workqueue: hd-audio0 hda_power_work [snd_hda_codec] Sep 17 21:25:09 Work kernel: [ 1065.427035] 0000000000000009 ffff880424fcdc00 ffffffff8171e569 0000000000000000 Sep 17 21:25:09 Work kernel: [ 1065.427047] ffff880424fcdc38 ffffffff8106775d 0000000000000000 ffffffffa06579c0 Sep 17 21:25:09 Work kernel: [ 1065.427056] ffffffff813a81d0 0000000000000000 ffff880427ddd098 ffff880424fcdc48 Sep 17 21:25:09 Work kernel: [ 1065.427066] Call Trace: Sep 17 21:25:09 Work kernel: [ 1065.427078] [] dump_stack+0x45/0x56 Sep 17 21:25:09 Work kernel: [ 1065.427088] [] warn_slowpath_common+0x7d/0xa0 Sep 17 21:25:09 Work kernel: [ 1065.427103] [] ? pci_legacy_suspend_late+0xf0/0xf0 Sep 17 21:25:09 Work kernel: [ 1065.427110] [] warn_slowpath_null+0x1a/0x20 Sep 17 21:25:09 Work kernel: [ 1065.427154] [] i915_release_power_well+0x5a/0x60 [i915] Sep 17 21:25:09 Work kernel: [ 1065.427168] [] hda_display_power+0x28/0x40 [snd_hda_intel] Sep 17 21:25:09 Work kernel: [ 1065.427179] [] azx_runtime_suspend+0x8f/0xb0 [snd_hda_intel] Sep 17 21:25:09 Work kernel: [ 1065.427189] [] pci_pm_runtime_suspend+0x61/0x140 Sep 17 21:25:09 Work kernel: [ 1065.427198] [] ? pci_legacy_suspend_late+0xf0/0xf0 Sep 17 21:25:09 Work kernel: [ 1065.427208] [] __rpm_callback+0x36/0xc0 Sep 17 21:25:09 Work kernel: [ 1065.427219] [] ? azx_get_response+0xfb/0x320 [snd_hda_intel] Sep 17 21:25:09 Work kernel: [ 1065.427227] [] rpm_callback+0x24/0x80 Sep 17 21:25:09 Work kernel: [ 1065.427235] [] rpm_suspend+0x126/0x6e0 Sep 17 21:25:09 Work kernel: [ 1065.427245] [] ? __wake_up+0x44/0x50 Sep 17 21:25:09 Work kernel: [ 1065.427253] [] rpm_idle+0xd6/0x2b0 Sep 17 21:25:09 Work kernel: [ 1065.427261] [] __pm_runtime_idle+0x5d/0x80 Sep 17 21:25:09 Work kernel: [ 1065.427271] [] azx_power_notify+0x2d/0x40 [snd_hda_intel] Sep 17 21:25:09 Work kernel: [ 1065.427289] [] hda_power_work+0x9e/0xa0 [snd_hda_codec] Sep 17 21:25:09 Work kernel: [ 1065.427299] [] process_one_work+0x182/0x450 Sep 17 21:25:09 Work kernel: [ 1065.427307] [] worker_thread+0x121/0x410 Sep 17 21:25:09 Work kernel: [ 1065.427316] [] ? rescuer_thread+0x430/0x430 Sep 17 21:25:09 Work kernel: [ 1065.427323] [] kthread+0xd2/0xf0 Sep 17 21:25:09 Work kernel: [ 1065.427331] [] ? kthread_create_on_node+0x1c0/0x1c0 Sep 17 21:25:09 Work kernel: [ 1065.427338] [] ret_from_fork+0x7c/0xb0 Sep 17 21:25:09 Work kernel: [ 1065.427346] [] ? kthread_create_on_node+0x1c0/0x1c0 Sep 17 21:25:09 Work kernel: [ 1065.427350] ---[ end trace 0c8355f729ce11e5 ]---