drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in dpll_hw_state.wrpll (expected 0xb0210614, found 0x00000000

[Ralf Hildebrandt]

While surfing, I clicked on something,, X died, I was thrown back to a console and finally was able to log back in.
dmesg is cluttered with:

[79849.958943] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in dpll_hw_state.wrpll (expected 0xb0210614, found 0x00000000)
[79849.958944] ------------[ cut here ]------------
[79849.958962] WARNING: CPU: 0 PID: 14689 at /build/linux-1dujk3/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:12326 check_crtc_state+0x2c5/0x440 [i915]()
[79849.958963] pipe state doesn't match!
[79849.958981] Modules linked in: bnep bluetooth binfmt_misc nls_iso8859_1 intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_hdmi coretemp snd_hda_codec_realtek input_leds snd_hda_codec_generic kvm_intel snd_hda_intel kvm snd_hda_codec snd_hda_core snd_hwdep snd_pcm crct10dif_pclmul snd_seq_midi snd_seq_midi_event snd_rawmidi crc32_pclmul ghash_clmulni_intel snd_seq snd_seq_device snd_timer mei_me aesni_intel snd mei aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd soundcore serio_raw 8250_fintek fujitsu_laptop lpc_ich tpm_infineon mac_hid parport_pc ppdev lp parport autofs4 hid_generic usbhid hid i915 psmouse ahci libahci i2c_algo_bit drm_kms_helper e1000e drm ptp pps_core video
[79849.958983] CPU: 0 PID: 14689 Comm: Xorg Tainted: G W 4.2.0-11-generic #13-Ubuntu
[79849.958983] Hardware name: FUJITSU ESPRIMO E920/D3222-A1, BIOS V4.6.5.4 R1.34.0 for D3222-A1x 01/08/2015
[79849.958985] ffffffffc0232ab0 ffff88030edef538 ffffffff817b0cc5 0000000000000000
[79849.958986] ffff88030edef588 ffff88030edef578 ffffffff81076536 ffff88030edef5a8
[79849.958986] ffff88030edef610 ffff88030a600800 0000000000000001 ffff88030a600b50
[79849.958987] Call Trace:
[79849.958991] [<ffffffff817b0cc5>] dump_stack+0x45/0x57
[79849.958994] [<ffffffff81076536>] warn_slowpath_common+0x86/0xc0
[79849.958995] [<ffffffff810765b6>] warn_slowpath_fmt+0x46/0x50
[79849.959008] [<ffffffffc01c5327>] ? intel_pipe_config_compare+0xa67/0xc60 [i915]
[79849.959015] [<ffffffffc01c57e5>] check_crtc_state+0x2c5/0x440 [i915]
[79849.959024] [<ffffffffc01d92fe>] intel_modeset_check_state+0x20e/0x6b0 [i915]
[79849.959032] [<ffffffffc01da4a7>] intel_crtc_set_config+0x4c7/0x580 [i915]
[79849.959042] [<ffffffffc0033036>] drm_mode_set_config_internal+0x66/0x100 [drm]
[79849.959045] [<ffffffffc00f23b2>] restore_fbdev_mode+0xc2/0xf0 [drm_kms_helper]
[79849.959048] [<ffffffffc00f4239>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x70 [drm_kms_helper]
[79849.959050] [<ffffffffc00f42a2>] drm_fb_helper_set_par+0x22/0x40 [drm_kms_helper]
[79849.959060] [<ffffffffc01e76da>] intel_fbdev_set_par+0x1a/0x60 [i915]
[79849.959062] [<ffffffff8109e4ad>] ? ttwu_do_activate.constprop.89+0x5d/0x70
[79849.959064] [<ffffffff814262a8>] fb_set_var+0x238/0x460
[79849.959066] [<ffffffff81201da7>] ? do_sys_poll+0x127/0x5a0
[79849.959068] [<ffffffff8141ca59>] fbcon_blank+0x2e9/0x330
[79849.959070] [<ffffffff810a7e13>] ? check_preempt_wakeup+0x193/0x220
[79849.959071] [<ffffffff814ad2c3>] do_unblank_screen+0xd3/0x1a0
[79849.959073] [<ffffffff814a2adb>] vt_ioctl+0x4fb/0x12c0
[79849.959074] [<ffffffff8109f042>] ? default_wake_function+0x12/0x20
[79849.959076] [<ffffffff810b60e6>] ? autoremove_wake_function+0x16/0x40
[79849.959078] [<ffffffff8149601c>] tty_ioctl+0x3cc/0xbb0
[79849.959079] [<ffffffff810b5a88>] ? __wake_up+0x48/0x60
[79849.959080] [<ffffffff810d599d>] ? wake_nocb_leader+0x4d/0x50
[79849.959081] [<ffffffff810d5a6d>] ? __call_rcu_nocb_enqueue+0xcd/0xd0
[79849.959083] [<ffffffff81200075>] do_vfs_ioctl+0x285/0x470
[79849.959084] [<ffffffff8120ca04>] ? mntput+0x24/0x40
[79849.959085] [<ffffffff811ef040>] ? __fput+0x190/0x220
[79849.959086] [<ffffffff812002d9>] SyS_ioctl+0x79/0x90
[79849.959088] [<ffffffff817b7532>] entry_SYSCALL_64_fastpath+0x16/0x75
[79849.959089] ---[ end trace c15f693470bdbc48 ]---
[79849.959131] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in dpll_hw_state.wrpll (expected 0xb0210614, found 0x00000000)
[79849.959131] ------------[ cut here ]------------

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-11-generic 4.2.0-11.13
ProcVersionSignature: Ubuntu 4.2.0-11.13-generic 4.2.1
Uname: Linux 4.2.0-11-generic x86_64
ApportVersion: 2.19-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: hildeb 25581 F.... pulseaudio
 /dev/snd/controlC1: hildeb 25581 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Sep 30 12:04:59 2015
HibernationDevice: RESUME=UUID=d5037585-3853-4049-a410-b17d0c104ef3
InstallationDate: Installed on 2014-06-19 (467 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
IwConfig:
 eth0 no wireless extensions.

 lo no wireless extensions.
MachineType: FUJITSU ESPRIMO E920
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-11-generic.efi.signed root=UUID=e0d7cff3-bbdd-467d-b15b-fb96697320f0 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.2.0-11-generic N/A
 linux-backports-modules-4.2.0-11-generic N/A
 linux-firmware 1.148
RfKill:

SourcePackage: linux
UpgradeStatus: Upgraded to wily on 2015-09-29 (0 days ago)
dmi.bios.date: 01/08/2015
dmi.bios.vendor: FUJITSU // American Megatrends Inc.
dmi.bios.version: V4.6.5.4 R1.34.0 for D3222-A1x
dmi.board.name: D3222-A1
dmi.board.vendor: FUJITSU
dmi.board.version: S26361-D3222-A1
dmi.chassis.type: 3
dmi.chassis.vendor: FUJITSU
dmi.chassis.version: C$BK02
dmi.modalias: dmi:bvnFUJITSU//AmericanMegatrendsInc.:bvrV4.6.5.4R1.34.0forD3222-A1x:bd01/08/2015:svnFUJITSU:pnESPRIMOE920:pvr:rvnFUJITSU:rnD3222-A1:rvrS26361-D3222-A1:cvnFUJITSU:ct3:cvrC$BK02:
dmi.product.name: ESPRIMO E920
dmi.sys.vendor: FUJITSU

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Do you have a way to reproduce this bug, or was it a one time event?

[Ralf Hildebrandt (ralf-hildebrandt)]

* Joseph Salisbury <email address hidden>:
> Do you have a way to reproduce this bug, or was it a one time event?

So far it was a one time event, but I didn't update that long ago.

[Sergey Galkin (sgalkin)]

may be this help
reproduced on 4.2.1, 4.2.3 kernel but on gentoo :)

[ 5.841753] [drm:check_crtc_state] *ERROR* mismatch in dpll_hw_state.wrpll (expected 0xb0210614, found 0x00000000)
[ 5.842534] ------------[ cut here ]------------
[ 5.843242] WARNING: CPU: 2 PID: 545 at drivers/gpu/drm/i915/intel_display.c:12324 check_crtc_state+0x86d/0xf90()
[ 5.843960] pipe state doesn't match!
[ 5.844670] Modules linked in: bridge stp llc snd_usb_audio snd_usbmidi_lib snd_rawmidi snd_hda_codec_realtek snd_hda_codec_generic intel_rapl snd_hda_codec_hdmi iosf_mbi x86_pkg_temp_thermal input_leds led_class snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_timer crc32c_intel ghash_clmulni_intel aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd
[ 5.846294] CPU: 2 PID: 545 Comm: X Tainted: G W 4.2.3-gentoo #1
[ 5.847101] Hardware name: ASUS All Series/B85M-E, BIOS 0806 02/20/2014
[ 5.847905] 0000000000000000 ffffffff81a1f318 ffffffff81768b3c ffff880405363918
[ 5.848723] ffffffff8109435c ffff8800d64e3000 ffff88040a302000 ffff8800d7c20000
[ 5.849542] 0000000000000001 ffff88040a302350 ffffffff810943d5 ffffffff819f89d4
[ 5.850351] Call Trace:
[ 5.851152] [<ffffffff81768b3c>] ? dump_stack+0x40/0x50
[ 5.851951] [<ffffffff8109435c>] ? warn_slowpath_common+0x7c/0xb0
[ 5.852740] [<ffffffff810943d5>] ? warn_slowpath_fmt+0x45/0x50
[ 5.853527] [<ffffffff8149bccd>] ? check_crtc_state+0x86d/0xf90
[ 5.853529] [<ffffffff8147915a>] ? i915_get_crtc_scanoutpos+0x18a/0x230
[ 5.853531] [<ffffffff814ae976>] ? intel_modeset_check_state+0x206/0xb00
[ 5.853532] [<ffffffff814affd9>] ? intel_crtc_set_config+0x529/0x590
[ 5.853535] [<ffffffff8141b15e>] ? drm_atomic_helper_plane_set_property+0x7e/0xc0
[ 5.853537] [<ffffffff8142e009>] ? drm_mode_set_config_internal+0x59/0xf0
[ 5.853539] [<ffffffff8141cf32>] ? restore_fbdev_mode+0xb2/0xd0
[ 5.853539] [<ffffffff8141ec0b>] ? drm_fb_helper_restore_fbdev_mode_unlocked+0x1b/0x60
[ 5.853541] [<ffffffff814bea39>] ? intel_fbdev_restore_mode+0x19/0x50
[ 5.853543] [<ffffffff81422888>] ? drm_lastclose+0x28/0x140
[ 5.853544] [<ffffffff81422cac>] ? drm_release+0x30c/0x4f0
[ 5.853546] [<ffffffff8119f7c7>] ? __fput+0xc7/0x1d0
[ 5.853548] [<ffffffff810acf5f>] ? task_work_run+0x7f/0xb0
[ 5.853549] [<ffffffff8104b7fe>] ? do_notify_resume+0x4e/0x70
[ 5.853551] [<ffffffff8176f67c>] ? int_signal+0x12/0x17
[ 5.853552] ---[ end trace d1cdcf9ea2c0170b ]---

[Hanmac (hanmac)]

i also get this two different Call Traces:

Nov 12 07:19:05 hansmackowiak kernel: [ 400.988455] ------------[ cut here ]------------
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988483] WARNING: CPU: 0 PID: 1385 at /build/linux-jJX2Dm/linux-4.2.0/drivers/gpu/drm/i915/i915_gem.c:5269 i915_gem_track_fb+0x129/0x140 [i915]()
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988485] WARN_ON(!(old->frontbuffer_bits & frontbuffer_bits))
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988486] Modules linked in: drbg ansi_cprng pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) uas usb_storage binfmt_misc intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm snd_hda_codec_hdmi crct10dif_pclmul crc32_pclmul snd_hda_codec_realtek snd_hda_codec_generic ghash_clmulni_intel joydev snd_hda_intel input_leds snd_hda_codec aesni_intel snd_hda_core aes_x86_64 snd_hwdep lrw gf128mul snd_pcm glue_helper snd_seq_midi ablk_helper snd_seq_midi_event snd_rawmidi cryptd snd_seq snd_seq_device serio_raw snd_timer snd shpchp lpc_ich soundcore mei_me mei cuse 8250_fintek soc_button_array tpm_infineon mac_hid parport_pc ppdev lp parport autofs4 hid_generic usbhid hid i915 i2c_algo_bit drm_kms_helper psmouse e1000e ahci drm libahci ptp pps_core video
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988538] CPU: 0 PID: 1385 Comm: Xorg Tainted: G W OE 4.2.0-18-generic #22-Ubuntu
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988540] Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./Q87M-D2H, BIOS F7 01/17/2014
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988541] 0000000000000000 00000000db46ced3 ffff8800b522bac8 ffffffff817e8c09
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988545] 0000000000000000 ffff8800b522bb20 ffff8800b522bb08 ffffffff8107b3c6
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988548] ffff880426193d80 0000000000000010 ffff880425adc000 ffff880425adc000
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988551] Call Trace:
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988557] [<ffffffff817e8c09>] dump_stack+0x45/0x57
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988562] [<ffffffff8107b3c6>] warn_slowpath_common+0x86/0xc0
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988565] [<ffffffff8107b455>] warn_slowpath_fmt+0x55/0x70
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988581] [<ffffffffc0194ec9>] i915_gem_track_fb+0x129/0x140 [i915]
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988602] [<ffffffffc01dd367>] intel_prepare_plane_fb+0xe7/0x1a0 [i915]
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988610] [<ffffffffc0139fa9>] drm_atomic_helper_prepare_planes+0x59/0xe0 [drm_kms_helper]
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988628] [<ffffffffc00519d5>] ? drm_atomic_check_only+0x215/0x540 [drm]
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988648] [<ffffffffc01ee022>] intel_atomic_commit+0x42/0x100 [i915]
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988663] [<ffffffffc0051d37>] drm_atomic_commit+0x37/0x60 [drm]
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988669] [<ffffffffc013b617>] drm_atomic_helper_plane_set_property+0x87/0xc0 [drm_kms_helper]
Nov 12 07:19:05 hansmackowiak kernel: [ 400.988681] [<ffffffffc...

[Lito (lito-eordes)]

Same here and this error messages is repeated about 20 times. After the error my user session is logged off and login screen appears.

# uname -a
Linux lito-pc 4.2.0-19-generic #23-Ubuntu SMP Wed Nov 11 11:39:30 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

# lsb_release -a
LSB Version: core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch:core-4.1-amd64:core-4.1-noarch:cxx-3.0-amd64:cxx-3.0-noarch:cxx-3.1-amd64:cxx-3.1-noarch:cxx-3.2-amd64:cxx-3.2-noarch:cxx-4.0-amd64:cxx-4.0-noarch:cxx-4.1-amd64:cxx-4.1-noarch:desktop-3.1-amd64:desktop-3.1-noarch:desktop-3.2-amd64:desktop-3.2-noarch:desktop-4.0-amd64:desktop-4.0-noarch:desktop-4.1-amd64:desktop-4.1-noarch:graphics-2.0-amd64:graphics-2.0-noarch:graphics-3.0-amd64:graphics-3.0-noarch:graphics-3.1-amd64:graphics-3.1-noarch:graphics-3.2-amd64:graphics-3.2-noarch:graphics-4.0-amd64:graphics-4.0-noarch:graphics-4.1-amd64:graphics-4.1-noarch:languages-3.2-amd64:languages-3.2-noarch:languages-4.0-amd64:languages-4.0-noarch:languages-4.1-amd64:languages-4.1-noarch:multimedia-3.2-amd64:multimedia-3.2-noarch:multimedia-4.0-amd64:multimedia-4.0-noarch:multimedia-4.1-amd64:multimedia-4.1-noarch:printing-3.2-amd64:printing-3.2-noarch:printing-4.0-amd64:printing-4.0-noarch:printing-4.1-amd64:printing-4.1-noarch:qt4-3.1-amd64:qt4-3.1-noarch:security-4.0-amd64:security-4.0-noarch:security-4.1-amd64:security-4.1-noarch
Distributor ID: Ubuntu
Description: Ubuntu 15.10
Release: 15.10
Codename: wily

# lspci
00:00.0 Host bridge: Intel Corporation 4th Gen Core Processor DRAM Controller (rev 06)
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06)
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
00:14.0 USB controller: Intel Corporation 9 Series Chipset Family USB xHCI Controller
00:16.0 Communication controller: Intel Corporation 9 Series Chipset Family ME Interface #1
00:1a.0 USB controller: Intel Corporation 9 Series Chipset Family USB EHCI Controller #2
00:1b.0 Audio device: Intel Corporation 9 Series Chipset Family HD Audio Controller
00:1c.0 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root Port 1 (rev d0)
00:1c.2 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root Port 3 (rev d0)
00:1c.3 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root Port 4 (rev d0)
00:1d.0 USB controller: Intel Corporation 9 Series Chipset Family USB EHCI Controller #1
00:1f.0 ISA bridge: Intel Corporation 9 Series Chipset Family H97 Controller
00:1f.2 SATA controller: Intel Corporation 9 Series Chipset Family SATA Controller [AHCI Mode]
00:1f.3 SMBus: Intel Corporation 9 Series Chipset Family SMBus Controller
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)
03:00.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 41)

# dmesg

[34021.224106] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in dpll_hw_state.wrpll (expected 0xb0210614, found 0x00000000)
[...

[Lito (lito-eordes)]

Always occurs randomly when I click in some web link but not related with website visited. Occurs about one time at day. I only use Google Chrome as browser.

[Stepan Roucka (rouckas)]

I am also affected by this bug. My screen sometimes "randomly" freezes (when making a screenshot for example...) and this:

[drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in dpll_hw_state.wrpll (expected 0xb035061f, found 0x00000000)

is written in console.

It always happens when I run glxgears. The screen is frozen with exception of the mouse cursor - it moves and changes shape when I hover a hyperlink or text. The system is responding, I is just not shown on the screen (I hope I am explaining this clearly). I can switch to console with ctrl+alt+f1, then killall glxgears, then alt+f7 everything is OK again. The actions that I did when the screen was frozen (like switching window, clicking a link...) are now visible.

#uname -a
Linux kevf14 4.2.0-23-generic #28-Ubuntu SMP Sun Dec 27 17:47:31 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

#dmesg

[1122359.632664] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in dpll_hw_state.wrpll (expected 0xb035061f, found 0x00000000)
[1122359.632665] ------------[ cut here ]------------
[1122359.632674] WARNING: CPU: 0 PID: 8075 at /build/linux-AFqQDb/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:12328 check_crtc_state+0x2c5/0x440 [i915]()
[1122359.632675] pipe state doesn't match!
[1122359.632676] Modules linked in: nls_iso8859_1 pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) binfmt_misc usblp snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_intel input_leds snd_hda_codec kvm_intel snd_hda_core snd_hwdep kvm snd_pcm crct10dif_pclmul snd_seq_midi snd_seq_midi_event crc32_pclmul snd_rawmidi aesni_intel snd_seq aes_x86_64 lrw snd_seq_device gf128mul glue_helper snd_timer ablk_helper cryptd snd soundcore serio_raw mei_me lpc_ich mei shpchp 8250_fintek soc_button_array mac_hid tpm_infineon parport_pc ppdev lp parport autofs4 uas usb_storage hid_generic usbhid hid i915 i2c_algo_bit drm_kms_helper e1000e ahci psmouse drm libahci ptp pps_core video
[1122359.632695] CPU: 0 PID: 8075 Comm: Xorg Tainted: G W OE 4.2.0-23-generic #28-Ubuntu
[1122359.632696] Hardware name: Gigabyte Technology Co., Ltd. H87-D3H/H87-D3H-CF, BIOS F2 04/19/2013
[1122359.632697] 0000000000000000 0000000087e1737d ffff8803ec3e37c8 ffffffff817e94c9
[1122359.632698] 0000000000000000 ffff8803ec3e3820 ffff8803ec3e3808 ffffffff8107b3d6
[1122359.632699] ffff8803ec3e3848 ffff8803ec3e38b0 ffff88061c27d800 0000000000000001
[1122359.632701] Call Trace:
[1122359.632703] [<ffffffff817e94c9>] dump_stack+0x45/0x57
[1122359.632705] [<ffffffff8107b3d6>] warn_slowpath_common+0x86/0xc0
[1122359.632706] [<ffffffff8107b465>] warn_slowpath_fmt+0x55/0x70
[1122359.632714] [<ffffffffc01c7877>] ? intel_pipe_config_compare+0xa67/0xc60 [i915]
[1122359.632722] [<ffffffffc01c7d35>] check_crtc_state+0x2c5/0x440 [i915]
[1122359.632731] [<ffffffffc01dbb5d>] intel_modeset_check_state+0x21d/0x6d0 [i915]
[1122359.632738] [<ffffffffc01dcd17>] intel_crtc_set_config+0x4c7/0x580 [i915]
[1122359.632745] [<ffffffffc0047ef5>] ? drm_mode_create+0x25/0x60 [drm]
[1122359.632750] [<ffffffffc00414a6>] drm_mode_set_config_internal+0x66/0x100 [drm]
...

[Hanmac (hanmac)]

also interesting when i use glxgears with multiple it might only freeze on the main monitor,
specially if i move the window slowly from the second monitor to the first it might freeze while the window is visible on both monitors, but if i drag it fast to the main monitor it might freeze not.

but it 100% freeze if i want to move it outside of the main monitor.

my monitor configuration is that the second is left from the main monitor but 90% rotated.
and if i move it right out of the first monitor then it freeze.

[Martin Pecka (peci1)]

I'm also affected by this bug, when running both glxgears and Gazebo simulator (or, its graphical client using OpenGL).

Switching to a terminal (Ctrl+Alt+F1) and back unfreezes the screen for a while. The screen only looks frozen, but normally reacts to mouse and keyboard events. This only happens if the GL window is displayed on my primary display (which is handled by the intel integrated chip). The notebook has 2 video outputs and a discrete AMD graphics, and I think only one of the outputs is handled by the AMD card, so I think one of the outputs is handled by the intel card and does not get frozen.

Ubuntu 14.04.3 64bit.

I think that before upgrading from 14.04.2 to 14.04.3 this did not happen.

[penalvch (penalvch)]

Martin Pecka, it will help immensely if you filed a new report with the Ubuntu repository kernel (not mainline/upstream) via a terminal:
ubuntu-bug linux

Please feel free to subscribe me to it.

For more on why this is helpful, please see https://wiki.ubuntu.com/ReportingBugs.

[Martin Pecka (peci1)]

@penalvch: Reported: https://bugs.launchpad.net/ubuntu/+source/linux-lts-wily/+bug/1554299