On Dell Precision 5510, the following appears in dmesg when booting on battery (no AC plugged in) and then plugging in the AC (TLP is used). This problem has been reported upstream (https://bugs.freedesktop.org/show_bug.cgi?id=96214), and even a patch has been suggested (https://bugs.freedesktop.org/show_bug.cgi?id=95646) which does not work however.
There is a related launchpad bug against mainline kernel (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1586046).
This problem occurs on:
- 4.4.0-28-generic
- 4.6.3 (mainline PPA)
- 4.7rc6 (compiled from Linus' tree)
[ +15.441606] ------------[ cut here ]------------
[ +0.000032] WARNING: CPU: 3 PID: 1959 at /build/linux-BvkamA/linux-4.4.0/ubuntu/i915/intel_uncore.c:649 __unclaimed_reg_debug+0x80/0x90 [i915_bpo]()
[ +0.000001] Unclaimed register detected after reading register 0x65f10
[ +0.000001] Modules linked in: drbg ansi_cprng ctr ccm nvram msr uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media vmw_vsock_vmci_transport vsock vmw_vmci uhid rfcomm btusb btrtl bnep arc4 binfmt_misc snd_hda_codec_hdmi dell_led snd_hda_codec_realtek iwlmvm snd_hda_codec_generic nls_iso8859_1 mac80211 dell_wmi sparse_keymap dell_rbtn dell_laptop dcdbas snd_hda_intel dell_smm_hwmon snd_hda_codec mxm_wmi iwlwifi intel_rapl snd_hda_core x86_pkg_temp_thermal intel_powerclamp snd_hwdep kvm_intel rtsx_pci_ms cfg80211 memstick kvm snd_pcm irqbypass snd_seq_midi crct10dif_pclmul crc32_pclmul snd_seq_midi_event aesni_intel aes_x86_64 lrw gf128mul snd_rawmidi glue_helper ablk_helper cryptd snd_seq snd_seq_device snd_timer joydev input_leds serio_raw snd soundcore
[ +0.000038] idma64 mei_me virt_dma mei processor_thermal_device shpchp intel_lpss_pci intel_soc_dts_iosf hci_uart btbcm btqca btintel bluetooth int3403_thermal intel_lpss_acpi intel_lpss dell_smo8800 int3400_thermal wmi acpi_thermal_rel int3402_thermal acpi_pad int340x_thermal_zone acpi_als kfifo_buf mac_hid industrialio coretemp parport_pc ppdev lp parport autofs4 rtsx_pci_sdmmc i915_bpo intel_ips i2c_algo_bit drm_kms_helper syscopyarea psmouse sysfillrect sysimgblt fb_sys_fops drm nvme ahci rtsx_pci libahci i2c_hid hid pinctrl_sunrisepoint video pinctrl_intel fjes
[ +0.000016] CPU: 3 PID: 1959 Comm: tlp Not tainted 4.4.0-28-generic #47-Ubuntu
[ +0.000001] Hardware name: Dell Inc. Precision 5510/08R8KJ, BIOS 01.02.10 06/30/2016
[ +0.000001] 0000000000000086 00000000c4023a8c ffff8800283b7aa0 ffffffff813eb1a3
[ +0.000001] ffff8800283b7ae8 ffffffffc028b868 ffff8800283b7ad8 ffffffff81081102
[ +0.000001] 0000000000000000 0000000000000001 0000000000065f10 ffff8808918b0080
[ +0.000001] Call Trace:
[ +0.000004] [<ffffffff813eb1a3>] dump_stack+0x63/0x90
[ +0.000002] [<ffffffff81081102>] warn_slowpath_common+0x82/0xc0
[ +0.000001] [<ffffffff8108119c>] warn_slowpath_fmt+0x5c/0x80
[ +0.000003] [<ffffffff816f88f8>] ? pci_conf1_write+0xb8/0xf0
[ +0.000011] [<ffffffffc01fbc00>] __unclaimed_reg_debug+0x80/0x90 [i915_bpo]
[ +0.000010] [<ffffffffc0201aee>] gen9_read32+0x35e/0x390 [i915_bpo]
[ +0.000011] [<ffffffffc0207d19>] i915_audio_component_codec_wake_override+0x39/0xb0 [i915_bpo]
[ +0.000004] [<ffffffffc06199cf>] snd_hdac_set_codec_wakeup+0x3f/0xa0 [snd_hda_core]
[ +0.000001] [<ffffffffc06320c7>] azx_runtime_resume+0x187/0x1b0 [snd_hda_intel]
[ +0.000002] [<ffffffff8143adbb>] pci_pm_runtime_resume+0x7b/0xa0
[ +0.000002] [<ffffffff81558303>] __rpm_callback+0x33/0x70
[ +0.000001] [<ffffffff8143ad40>] ? pci_restore_standard_config+0x40/0x40
[ +0.000001] [<ffffffff81558364>] rpm_callback+0x24/0x80
[ +0.000001] [<ffffffff8143ad40>] ? pci_restore_standard_config+0x40/0x40
[ +0.000001] [<ffffffff81558b27>] rpm_resume+0x497/0x6a0
[ +0.000002] [<ffffffff8122dae4>] ? mntput+0x24/0x40
[ +0.000002] [<ffffffff812176ad>] ? terminate_walk+0xbd/0xd0
[ +0.000001] [<ffffffff81558971>] rpm_resume+0x2e1/0x6a0
[ +0.000001] [<ffffffff8155807e>] ? rpm_check_suspend_allowed+0x6e/0xb0
[ +0.000001] [<ffffffff815583e3>] ? rpm_idle+0x23/0x250
[ +0.000002] [<ffffffff81559673>] pm_runtime_forbid+0x43/0x60
[ +0.000004] [<ffffffffc05ef8b4>] snd_hda_set_power_save+0x54/0xc0 [snd_hda_codec]
[ +0.000001] [<ffffffffc0631e8f>] param_set_xint+0x7f/0xa0 [snd_hda_intel]
[ +0.000002] [<ffffffff8109f891>] param_attr_store+0x61/0xc0
[ +0.000001] [<ffffffff8109eeee>] module_attr_store+0x1e/0x30
[ +0.000002] [<ffffffff8128cf67>] sysfs_kf_write+0x37/0x40
[ +0.000001] [<ffffffff8128c37d>] kernfs_fop_write+0x11d/
[ +0.000002] [<ffffffff8120c918>] __vfs_write+0x18/0x40
[ +0.000001] [<ffffffff8120d2a9>] vfs_write+0xa9/0x1a0
[ +0.000001] [<ffffffff8122b6e5>] ? set_close_on_exec+0x35/0x70
[ +0.000002] [<ffffffff8120df65>] SyS_write+0x55/0xc0
[ +0.000001] [<ffffffff818276b2>] entry_SYSCALL_64_fastpath+0x16/0x71
[ +0.000001] ---[ end trace 1f4aae93fd1d0302 ]---
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-28-generic 4.4.0-28.47
ProcVersionSignature: Ubuntu 4.4.0-28.47-generic 4.4.13
Uname: Linux 4.4.0-28-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: czikus 1586 F.... pulseaudio
CurrentDesktop: KDE
Date: Fri Jul 8 19:23:48 2016
InstallationDate: Installed on 2016-06-25 (13 days ago)
InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 8087:0a2b Intel Corp.
Bus 001 Device 003: ID 0c45:6713 Microdia
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. Precision 5510
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-28-generic.efi.signed root=UUID=76e1e2fe-a1b1-4b63-9189-0d651c5ae497 ro nogpumanager noprompt pcie_aspm=force intel_iommu=igfx_off acpi_osi=Linux "acpi_osi=!Windows 2013" i915.enable_rc6=1 i915.enable_psr=0 drm.vblankoffdelay=1 i915.enable_fbc=0 elevator=noop quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.4.0-28-generic N/A
linux-backports-modules-4.4.0-28-generic N/A
linux-firmware 1.157.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/30/2016
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 01.02.10
dmi.board.name: 08R8KJ
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr01.02.10:bd06/30/2016:svnDellInc.:pnPrecision5510:pvr:rvnDellInc.:rn08R8KJ:rvrA01:cvnDellInc.:ct9:cvr:
dmi.product.name: Precision 5510
dmi.sys.vendor: Dell Inc.
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