Comment 14 for bug 1308674

FWIW: This is what I get when the problem appears:

[110652.405086] ------------[ cut here ]------------
[110652.405143] WARNING: CPU: 2 PID: 1381 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_display.c:9237 intel_modeset_check_state+0x62d/0x780 [i915]()
[110652.405146] encoder's hw state doesn't match sw tracking (expected 1, found 0)
[110652.405148] Modules linked in: xt_tcpudp xt_REDIRECT xt_hl iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables usb_storage hid_generic hid_logitech_dj ctr ccm rfcomm bnep binfmt_misc snd_hda_codec_hdmi snd_hda_codec_realtek intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm uvcvideo videobuf2_vmalloc snd_hda_intel videobuf2_memops btusb videobuf2_core arc4 snd_hda_codec joydev thinkpad_acpi serio_raw snd_hwdep videodev wacom bluetooth nvram iwldvm snd_pcm mac80211 snd_page_alloc snd_seq_midi snd_seq_midi_event iwlwifi snd_rawmidi snd_seq lpc_ich nls_iso8859_1 snd_seq_device cfg80211 snd_timer snd soundcore mei_me mac_hid mei parport_pc ppdev lp parport dm_crypt usbhid hid crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i915 psmouse ahci e1000e libahci i2c_algo_bit ptp sdhci_pci sdhci drm_kms_helper pps_core drm wmi video
[110652.405228] CPU: 2 PID: 1381 Comm: Xorg Tainted: G W 3.13.0-36-generic #63-Ubuntu
[110652.405230] Hardware name: LENOVO 3437B52/3437B52, BIOS GCET95WW (2.55 ) 08/05/2013
[110652.405233] 0000000000000009 ffff880210f73b68 ffffffff8171e569 ffff880210f73bb0
[110652.405241] ffff880210f73ba0 ffffffff8106775d ffff880210f73c20 0000000000000001
[110652.405249] ffff88020c805800 ffff88020c805af8 ffff88020c806800 ffff880210f73c00
[110652.405256] Call Trace:
[110652.405266] [<ffffffff8171e569>] dump_stack+0x45/0x56
[110652.405273] [<ffffffff8106775d>] warn_slowpath_common+0x7d/0xa0
[110652.405278] [<ffffffff810677cc>] warn_slowpath_fmt+0x4c/0x50
[110652.405312] [<ffffffffa015c4cd>] intel_modeset_check_state+0x62d/0x780 [i915]
[110652.405340] [<ffffffffa015c6b5>] intel_set_mode+0x25/0x30 [i915]
[110652.405366] [<ffffffffa015cf5b>] intel_crtc_set_config+0x7ab/0x9a0 [i915]
[110652.405396] [<ffffffffa0029ebd>] drm_mode_set_config_internal+0x5d/0xe0 [drm]
[110652.405423] [<ffffffffa002cda7>] drm_mode_setcrtc+0xf7/0x5e0 [drm]
[110652.405432] [<ffffffff8164dff9>] ? netlink_broadcast_filtered+0x129/0x3b0
[110652.405453] [<ffffffffa001dc22>] drm_ioctl+0x502/0x630 [drm]
[110652.405466] [<ffffffff811d3c9c>] ? dput+0x4c/0x180
[110652.405473] [<ffffffff811d0390>] do_vfs_ioctl+0x2e0/0x4c0
[110652.405480] [<ffffffff811bef1e>] ? ____fput+0xe/0x10
[110652.405488] [<ffffffff8108823c>] ? task_work_run+0xac/0xe0
[110652.405495] [<ffffffff811d05f1>] SyS_ioctl+0x81/0xa0
[110652.405500] [<ffffffff8172efad>] system_call_fastpath+0x1a/0x1f
[110652.405504] ---[ end trace 0da629c82eacbf79 ]---
[110652.405521] [drm:intel_pipe_config_compare] *ERROR* mismatch in has_dp_encoder (expected 1, found 0)
[110652.405524] ------------[ cut here ]------------
[110652.405551] WARNING: CPU: 2 PID: 1381 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_display.c:9310 check_crtc_state+0x255/0x340 [i915]()
[110652.405554] pipe state doesn't match!
[110652.405556] Modules linked in: xt_tcpudp xt_REDIRECT xt_hl iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables usb_storage hid_generic hid_logitech_dj ctr ccm rfcomm bnep binfmt_misc snd_hda_codec_hdmi snd_hda_codec_realtek intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm uvcvideo videobuf2_vmalloc snd_hda_intel videobuf2_memops btusb videobuf2_core arc4 snd_hda_codec joydev thinkpad_acpi serio_raw snd_hwdep videodev wacom bluetooth nvram iwldvm snd_pcm mac80211 snd_page_alloc snd_seq_midi snd_seq_midi_event iwlwifi snd_rawmidi snd_seq lpc_ich nls_iso8859_1 snd_seq_device cfg80211 snd_timer snd soundcore mei_me mac_hid mei parport_pc ppdev lp parport dm_crypt usbhid hid crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i915 psmouse ahci e1000e libahci i2c_algo_bit ptp sdhci_pci sdhci drm_kms_helper pps_core drm wmi video
[110652.405627] CPU: 2 PID: 1381 Comm: Xorg Tainted: G W 3.13.0-36-generic #63-Ubuntu
[110652.405630] Hardware name: LENOVO 3437B52/3437B52, BIOS GCET95WW (2.55 ) 08/05/2013
[110652.405632] 0000000000000009 ffff880210f738a8 ffffffff8171e569 ffff880210f738f0
[110652.405639] ffff880210f738e0 ffffffff8106775d ffff880035f046e0 ffff880210f73970
[110652.405646] ffff88020c805800 ffff880035f04000 ffff88020c805b28 ffff880210f73940
[110652.405653] Call Trace:
[110652.405660] [<ffffffff8171e569>] dump_stack+0x45/0x56
[110652.405666] [<ffffffff8106775d>] warn_slowpath_common+0x7d/0xa0
[110652.405672] [<ffffffff810677cc>] warn_slowpath_fmt+0x4c/0x50
[110652.405700] [<ffffffffa014d23b>] ? intel_pipe_config_compare+0x60b/0xae0 [i915]
[110652.405725] [<ffffffffa014ea55>] check_crtc_state+0x255/0x340 [i915]
[110652.405753] [<ffffffffa015c15b>] intel_modeset_check_state+0x2bb/0x780 [i915]
[110652.405777] [<ffffffffa015c6b5>] intel_set_mode+0x25/0x30 [i915]
[110652.405801] [<ffffffffa015cf5b>] intel_crtc_set_config+0x7ab/0x9a0 [i915]
[110652.405827] [<ffffffffa0029ebd>] drm_mode_set_config_internal+0x5d/0xe0 [drm]
[110652.405852] [<ffffffffa002cda7>] drm_mode_setcrtc+0xf7/0x5e0 [drm]
[110652.405861] [<ffffffff8164dff9>] ? netlink_broadcast_filtered+0x129/0x3b0
[110652.405881] [<ffffffffa001dc22>] drm_ioctl+0x502/0x630 [drm]
[110652.405893] [<ffffffff811d3c9c>] ? dput+0x4c/0x180
[110652.405900] [<ffffffff811d0390>] do_vfs_ioctl+0x2e0/0x4c0
[110652.405907] [<ffffffff811bef1e>] ? ____fput+0xe/0x10
[110652.405913] [<ffffffff8108823c>] ? task_work_run+0xac/0xe0
[110652.405920] [<ffffffff811d05f1>] SyS_ioctl+0x81/0xa0
[110652.405925] [<ffffffff8172efad>] system_call_fastpath+0x1a/0x1f
[110652.405929] ---[ end trace 0da629c82eacbf7a ]---
[110652.411472] ------------[ cut here ]------------
[110652.411533] WARNING: CPU: 0 PID: 1381 at /build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_dp.c:2747 intel_dp_link_down+0x1d2/0x210 [i915]()
[110652.411536] Modules linked in: xt_tcpudp xt_REDIRECT xt_hl iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables usb_storage hid_generic hid_logitech_dj ctr ccm rfcomm bnep binfmt_misc snd_hda_codec_hdmi snd_hda_codec_realtek intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm uvcvideo videobuf2_vmalloc snd_hda_intel videobuf2_memops btusb videobuf2_core arc4 snd_hda_codec joydev thinkpad_acpi serio_raw snd_hwdep videodev wacom bluetooth nvram iwldvm snd_pcm mac80211 snd_page_alloc snd_seq_midi snd_seq_midi_event iwlwifi snd_rawmidi snd_seq lpc_ich nls_iso8859_1 snd_seq_device cfg80211 snd_timer snd soundcore mei_me mac_hid mei parport_pc ppdev lp parport dm_crypt usbhid hid crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i915 psmouse ahci e1000e libahci i2c_algo_bit ptp sdhci_pci sdhci drm_kms_helper pps_core drm wmi video
[110652.411649] CPU: 0 PID: 1381 Comm: Xorg Tainted: G W 3.13.0-36-generic #63-Ubuntu
[110652.411653] Hardware name: LENOVO 3437B52/3437B52, BIOS GCET95WW (2.55 ) 08/05/2013
[110652.411657] 0000000000000009 ffff880210f73a80 ffffffff8171e569 0000000000000000
[110652.411663] ffff880210f73ab8 ffffffff8106775d ffff88020c8068c8 ffff88020c805800
[110652.411670] ffff880035f04000 0000000084580304 ffff88020c404000 ffff880210f73ac8
[110652.411676] Call Trace:
[110652.411686] [<ffffffff8171e569>] dump_stack+0x45/0x56
[110652.411694] [<ffffffff8106775d>] warn_slowpath_common+0x7d/0xa0
[110652.411700] [<ffffffff8106783a>] warn_slowpath_null+0x1a/0x20
[110652.411734] [<ffffffffa0169402>] intel_dp_link_down+0x1d2/0x210 [i915]
[110652.411767] [<ffffffffa016d770>] intel_disable_dp+0x70/0x80 [i915]
[110652.411796] [<ffffffffa015280e>] ironlake_crtc_disable+0x1ae/0x940 [i915]
[110652.411805] [<ffffffff81614274>] ? consume_skb+0x34/0x80
[110652.411834] [<ffffffffa0159459>] __intel_set_mode+0x2c9/0x9d0 [i915]
[110652.411863] [<ffffffffa015c6a6>] intel_set_mode+0x16/0x30 [i915]
[110652.411890] [<ffffffffa015cf5b>] intel_crtc_set_config+0x7ab/0x9a0 [i915]
[110652.411921] [<ffffffffa0029ebd>] drm_mode_set_config_internal+0x5d/0xe0 [drm]
[110652.411948] [<ffffffffa002cda7>] drm_mode_setcrtc+0xf7/0x5e0 [drm]
[110652.411969] [<ffffffffa001dc22>] drm_ioctl+0x502/0x630 [drm]
[110652.411982] [<ffffffff8108ea92>] ? __hrtimer_start_range_ns+0x1a2/0x3a0
[110652.411991] [<ffffffff811d0390>] do_vfs_ioctl+0x2e0/0x4c0
[110652.411998] [<ffffffff8160b2b5>] ? __sys_recvmsg+0x65/0x80
[110652.412005] [<ffffffff811d05f1>] SyS_ioctl+0x81/0xa0
[110652.412012] [<ffffffff8172efad>] system_call_fastpath+0x1a/0x1f
[110652.412016] ---[ end trace 0da629c82eacbf7b ]---
[110652.793723] thinkpad_acpi: EC reports that Thermal Table has changed
[110652.897172] thinkpad_acpi: undocked from hotplug port replicator
[110652.898134] ACPI: \_SB_.GDCK: undocking

$ sudo dmidecode -s bios-version ; sudo dmidecode -s bios-release-date
GCET95WW (2.55 )
08/05/2013