High system load and mouse delays - pipe A vblank wait timed out

[Albert Weichselbraun]

This issue has been observed on a Lenovo X220i laptop:

1. Booting the laptop with artful's 4.12 kernel results in a very sluggish system performance (mouse pointer delays) and a high system load.
2. /var/log/kern.log indicates a problem with the display driver (see below)
3. The system works without any issues if the zesty kernel (4.10) is used instead.

Ubuntu release: Artful Aardvark (development branch)
Kernel package version: 4.12.0.13.14

<snip>
Sep 12 20:22:45 trinity kernel: [ 155.491074] pipe A vblank wait timed out
Sep 12 20:22:45 trinity kernel: [ 155.491117] ------------[ cut here ]------------
Sep 12 20:22:45 trinity kernel: [ 155.491171] WARNING: CPU: 0 PID: 203 at /build/linux-cK2WUa/linux-4.12.0/drivers/gpu/drm/i915/intel_display.c:12636 intel_atomic_commit_tail+0x1010/0x1020 [i915]
Sep 12 20:22:45 trinity kernel: [ 155.491172] Modules linked in: nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype br_netfilter aufs xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter binfmt_misc snd_hda_codec_hdmi snd_hda_codec_conexant snd_hda_codec_generic snd_hda_intel intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec snd_hda_core snd_hwdep snd_pcm kvm_intel snd_seq_midi kvm snd_seq_midi_event irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel cryptd intel_cstate snd_rawmidi intel_rapl_perf arc4 uvcvideo videobuf2_vmalloc iwldvm videobuf2_memops videobuf2_v4l2 mac80211
Sep 12 20:22:45 trinity kernel: [ 155.491215] videobuf2_core videodev joydev input_leds media iwlwifi serio_raw cfg80211 snd_seq snd_seq_device snd_timer thinkpad_acpi nvram snd mac_hid mei_me mei soundcore lpc_ich shpchp parport_pc ppdev lp parport ip_tables x_tables autofs4 xfs libcrc32c mmc_block i915 sdhci_pci uas usb_storage sdhci i2c_algo_bit drm_kms_helper psmouse syscopyarea ahci sysfillrect libahci sysimgblt e1000e fb_sys_fops drm ptp pps_core wmi video
Sep 12 20:22:45 trinity kernel: [ 155.491251] CPU: 0 PID: 203 Comm: kworker/u16:5 Not tainted 4.12.0-13-generic #14-Ubuntu
Sep 12 20:22:45 trinity kernel: [ 155.491253] Hardware name: LENOVO 4290W1A/4290W1A, BIOS 8DET69WW (1.39 ) 07/18/2013
Sep 12 20:22:45 trinity kernel: [ 155.491292] Workqueue: events_unbound intel_atomic_commit_work [i915]
Sep 12 20:22:45 trinity kernel: [ 155.491295] task: ffff8842c14a8000 task.stack: ffffae8f0217c000
Sep 12 20:22:45 trinity kernel: [ 155.491330] RIP: 0010:intel_atomic_commit_tail+0x1010/0x1020 [i915]
Sep 12 20:22:45 trinity kernel: [ 155.491331] RSP: 0018:ffffae8f0217fd88 EFLAGS: 00010282
Sep 12 20:22:45 trinity kernel: [ 155.491333] RAX: 000000000000001c RBX: 0000000000000000 RCX: 0000000000000000
Sep 12 20:22:45 trinity kernel: [ 155.491334] RDX: 0000000000000000 RSI: ffff8842de20dcc8 RDI: ffff8842de20dcc8
Sep 12 20:22:45 trinity kernel: [ 155.491336] RBP: ffffae8f0217fe40 R08: 0000000000000001 R09: 000000000000039a
Sep 12 20:22:45 trinity kernel: [ 155.491337] R10: ffffae8f0217fd88 R11: 0000000000000000 R12: 0000000000002359
Sep 12 20:22:45 trinity kernel: [ 155.491338] R13: ffff8842c1500000 R14: ffff8842c15e6000 R15: 0000000000000001
Sep 12 20:22:45 trinity kernel: [ 155.491340] FS: 0000000000000000(0000) GS:ffff8842de200000(0000) knlGS:0000000000000000
Sep 12 20:22:45 trinity kernel: [ 155.491342] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Sep 12 20:22:45 trinity kernel: [ 155.491343] CR2: 000000c420921000 CR3: 00000003a0409000 CR4: 00000000000406f0
Sep 12 20:22:45 trinity kernel: [ 155.491345] Call Trace:
Sep 12 20:22:45 trinity kernel: [ 155.491352] ? wake_bit_function+0x60/0x60
Sep 12 20:22:45 trinity kernel: [ 155.491386] intel_atomic_commit_work+0x12/0x20 [i915]
Sep 12 20:22:45 trinity kernel: [ 155.491390] process_one_work+0x1e7/0x410
Sep 12 20:22:45 trinity kernel: [ 155.491393] worker_thread+0x4a/0x410
Sep 12 20:22:45 trinity kernel: [ 155.491396] kthread+0x125/0x140
Sep 12 20:22:45 trinity kernel: [ 155.491398] ? process_one_work+0x410/0x410
Sep 12 20:22:45 trinity kernel: [ 155.491400] ? kthread_create_on_node+0x70/0x70
Sep 12 20:22:45 trinity kernel: [ 155.491403] ret_from_fork+0x25/0x30
Sep 12 20:22:45 trinity kernel: [ 155.491405] Code: ff ff ff 48 83 c7 08 e8 af 80 3c d5 4c 8b 85 70 ff ff ff 4d 85 c0 0f 85 f3 fa ff ff 8d 73 41 48 c7 c7 a8 07 3a c0 e8 d1 fb 4a d5 <0f> ff e9 dd fa ff ff 66 0f 1f 84 00 00 00 00 00 66 66 66 66 90
Sep 12 20:22:45 trinity kernel: [ 155.491448] ---[ end trace ef3f946052a590e8 ]---
</snip>

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: linux-image-4.12.0-13-generic 4.12.0-13.14
ProcVersionSignature: Ubuntu 4.10.0-33.37-generic 4.10.17
Uname: Linux 4.10.0-33-generic x86_64
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: albert 2485 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Tue Sep 12 20:38:13 2017
HibernationDevice: RESUME=UUID=3ede1c94-a8b8-434f-b19a-97972b4462f8
InstallationDate: Installed on 2017-07-28 (45 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
MachineType: LENOVO 4290W1A
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-33-generic root=UUID=05f420af-1ded-4d59-88c3-270af2bbdb15 ro quiet splash
RelatedPackageVersions:
 linux-restricted-modules-4.10.0-33-generic N/A
 linux-backports-modules-4.10.0-33-generic N/A
 linux-firmware 1.168
SourcePackage: linux
UpgradeStatus: Upgraded to artful on 2017-09-11 (0 days ago)
dmi.bios.date: 07/18/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET69WW (1.39 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4290W1A
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr8DET69WW(1.39):bd07/18/2013:svnLENOVO:pn4290W1A:pvrThinkPadX220:rvnLENOVO:rn4290W1A:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4290W1A
dmi.product.version: ThinkPad X220
dmi.sys.vendor: LENOVO

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.13 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.13.1

[Albert Weichselbraun (albert-weichselbraun)]

The bug is still present in the latest mainline kernel (v4.13.1).

<snip>
Sep 13 01:39:09 trinity kernel: [ 541.351648] pipe A vblank wait timed out
Sep 13 01:39:09 trinity kernel: [ 541.351728] ------------[ cut here ]------------
Sep 13 01:39:09 trinity kernel: [ 541.351787] WARNING: CPU: 0 PID: 187 at /home/kernel/COD/linux/drivers/gpu/drm/i915/intel_display.c:12844 intel_atomic_commit_tail+0xf7d/0xf90 [i915]
Sep 13 01:39:09 trinity kernel: [ 541.351788] Modules linked in: dm_crypt crypto_simd glue_helper aes_x86_64 algif_skcipher af_alg xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter binfmt_misc intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel uvcvideo kvm irqbypass arc4 crct10dif_pclmul crc32_pclmul ghash_clmulni_intel cryptd videobuf2_vmalloc intel_cstate iwldvm intel_rapl_perf mac80211 videobuf2_memops videobuf2_v4l2 videobuf2_core videodev snd_hda_codec_hdmi snd_seq_midi media iwlwifi thinkpad_acpi input_leds snd_hda_codec_conexant snd_hda_codec_generic nvram serio_raw snd_seq_midi_event snd_hda_intel
Sep 13 01:39:09 trinity kernel: [ 541.351827] wmi_bmof snd_hda_codec lpc_ich cfg80211 snd_hda_core snd_hwdep snd_rawmidi snd_pcm snd_seq mei_me snd_seq_device mei snd_timer shpchp snd soundcore mac_hid parport_pc ppdev lp parport ip_tables x_tables autofs4 xfs libcrc32c mmc_block i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect uas sysimgblt fb_sys_fops usb_storage ahci sdhci_pci psmouse libahci sdhci drm e1000e ptp pps_core wmi video
Sep 13 01:39:09 trinity kernel: [ 541.351859] CPU: 0 PID: 187 Comm: kworker/u16:5 Not tainted 4.13.1-041301-generic #201709100232
Sep 13 01:39:09 trinity kernel: [ 541.351860] Hardware name: LENOVO 4290W1A/4290W1A, BIOS 8DET69WW (1.39 ) 07/18/2013
Sep 13 01:39:09 trinity kernel: [ 541.351900] Workqueue: events_unbound intel_atomic_commit_work [i915]
Sep 13 01:39:09 trinity kernel: [ 541.351902] task: ffff96ba81f78000 task.stack: ffffa4b3c23e0000
Sep 13 01:39:09 trinity kernel: [ 541.351941] RIP: 0010:intel_atomic_commit_tail+0xf7d/0xf90 [i915]
Sep 13 01:39:09 trinity kernel: [ 541.351943] RSP: 0018:ffffa4b3c23e3d88 EFLAGS: 00010282
Sep 13 01:39:09 trinity kernel: [ 541.351944] RAX: 000000000000001c RBX: 0000000000000000 RCX: 0000000000000000
Sep 13 01:39:09 trinity kernel: [ 541.351946] RDX: 0000000000000000 RSI: ffff96ba9e20dc78 RDI: ffff96ba9e20dc78
Sep 13 01:39:09 trinity kernel: [ 541.351947] RBP: ffffa4b3c23e3e40 R08: 0000000000000001 R09: 0000000000000393
Sep 13 01:39:09 trinity kernel: [ 541.351948] R10: ffffa4b3c23e3d88 R11: 0000000000000000 R12: 0000000000007d76
Sep 13 01:39:09 trinity kernel: [ 541.351949] R13: ffff96ba81528000 R14: ffff96ba8191a000 R15: 0000000000000001
Sep 13 01:39:09 trinity kernel: [ 541.351951] FS: 0000000000000000(0000) GS:ffff96ba9e200000(0000) knlGS:0000000000000000
Sep 13 01:39:09 trinity kernel: [ 541.351953] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Sep 13 01:39:09 trinity kernel: [ 541.351954] ...

[Joseph Salisbury (jsalisbury)]

This issue appears to be an upstream bug, since you tested the latest upstream kernel. Would it be possible for you to open an upstream bug report[0]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug.

Please follow the instructions on the wiki page[0]. The first step is to email the appropriate mailing list. If no response is received, then a bug may be opened on bugzilla.kernel.org.

Once this bug is reported upstream, please add the tag: 'kernel-bug-reported-upstream'.

[0] https://wiki.ubuntu.com/Bugs/Upstream/kernel

[Joseph Salisbury (jsalisbury)]

I'd like to perform a bisect to figure out what commit caused this regression. We need to identify the last kernel that did not exhibit the bug and the first kernel that did exhibit the bug.

Can you test the following kernels and report back? We are looking for the first kernel version that exhibits this bug:

4.11-rc1: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11-rc1/
4.11 final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11/
4.12-rc1: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.12-rc1/

You don't have to test every kernel, just up until the kernel that first has this bug.

Thanks in advance!

[Albert Weichselbraun (albert-weichselbraun)]

Done - the last working kernel version is 4.12.7: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.12.7/

4.12.8 is the first version that causes the reported issues.

[Albert Weichselbraun (albert-weichselbraun)]

I have added a bug report to https://bugs.freedesktop.org/show_bug.cgi?id=102711

[Joseph Salisbury (jsalisbury)]

Can you test the following kernel and see if it resolves this bug:

http://kernel.ubuntu.com/~jsalisbury/lp1716747/commit-5d99613-reverted/

To test the kernel, you need to install both the linux-image and linux-image-extra .deb packages.

[Albert Weichselbraun (albert-weichselbraun)]

Thank you for providing the test kernel. I am afraid this does not resolve the issue.

As mentioned in the upstream bug report, it turned out that the problem is triggered in the xhci-pci code and caused by an ExpressCard Renesas uPD720202 USB 3.0 controller. I was able to narrowed the issue down to commit 0e1f0ea which forces a PCI reset on that device at startup and have reported the problem to the linux usb mailing list:

https://marc.info/?t=150565318600001&r=1&w=2

It looks like the reset leaves the controller in an unstable state, triggering
 - pipe A vblank wait timed out and
 - pipe B vblank wait timed out
kernel messages.

On my machine reverting the mentioned commit reliably resolves the issue for kernel versions 4.12.8, 4.13.1 and 4.13.2. The same is true for removing the external ExpressCard.

[Joseph Salisbury (jsalisbury)]

I built a second test kernel. This one with commit 8466489ef5ba48272ba4fa4ea9f8f403306de4c7 reverted.

The second test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1716747/

To test the kernel, you need to install both the linux-image and linux-image-extra .deb packages and be sure you uninstalled the last test kernel.

Thanks in advance!

[Albert Weichselbraun (albert-weichselbraun)]

Thank you - now everything works perfectly well :)

[Jay Vosburgh (jvosburgh)]

Just a comment that I have observed this bug as well, on an X220 T. The test kernel from comment #11 also appears to resolve the problem (so far). I do not have any external USB controllers attached, though, so I'm not sure what the failure path was.

[Albert Weichselbraun (albert-weichselbraun)]

that's strange - could you please post the output of lspci -vt

[Jay Vosburgh (jvosburgh)]

Albert,

This is the lspci from my X220 T:

-[0000:00]-+-00.0 Intel Corporation 2nd Generation Core Processor Family DRAM Controller
           +-02.0 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller
           +-16.0 Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1
           +-19.0 Intel Corporation 82579LM Gigabit Network Connection
           +-1a.0 Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2
           +-1b.0 Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller
           +-1c.0-[01]--
           +-1c.1-[02]----00.0 Intel Corporation Centrino Advanced-N 6205 [Taylor Peak]
           +-1c.3-[03]--
           +-1c.4-[04]----00.0 Ricoh Co Ltd PCIe SDXC/MMC Host Controller
           +-1d.0 Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1
           +-1f.0 Intel Corporation QM67 Express Chipset Family LPC Controller
           +-1f.2 Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller
           \-1f.3 Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller

[krot (krot-mstu)]

Hello Joseph, I have the same error with my Ubuntu 17.10. Syslog are full of error messages. It's almost impossible to work.

[Wade Allen (wadesallen)]

Thanks so much for working on this. I am unable to install 17.10 as a result of this bug.

[Joseph Salisbury (jsalisbury)]

@Albert and Jay, are you still seeing this bug with the latest release of Artful?

@krot and @Wade, can you test the kernel posted at:
http://kernel.ubuntu.com/~jsalisbury/lp1716747/

[Laurent Boucher (34lab)]

Hello,
I think I have this bug (see syslog extract) with a lenovo t470, ubuntu 17.10, kernel 4.13.4 and 4.13.9
With 17.04 Gnome + kernel 4.13.4, I've never encountered these crash during three weeks. And since having upgraded to 17.10, two crashs in two days.
It seems to occurs when the screen is locked (maybe during sleep). When I'm away from keyboard. But not systematically. No usb peripherals are connected.
regards.

[Jay Vosburgh (jvosburgh)]

Joe,

No, I'm not seeing the issue now; running 4.13.0-16 for the last 10 days or so.

[Albert Weichselbraun (albert-weichselbraun)]

I am still seeing this issues with 4.13.0-16. Ultimately this problem (at least in my case) seems to be a PCI express power management issue (see https://www.spinics.net/lists/linux-pci/msg64778.html).

The following workarounds solve the problem on my system:
 a) remove the PCI express card from the system, or
 b) disable the PCI express power management in the Lenovo X220i's BIOS

Another option is to use a kernel that reverts commit 8466489ef5ba48272ba4fa4ea9f8f403306de4c7, although the correct solution would be to investigate and fix the power management issues which trigger this problem.

[cya (cyanamide)]

Experiencing the same problem

Specs:
Dell n411z
Ubuntu 17.10 artful
kernel 4.13.0-16.19 (also tried 4.12.0-041200.20 but problem still exists)

[Wade Allen (wadesallen)]

It seems that the PCI Express card was the culprit. When I removed my PCI Express USB 3.0 card everything worked fine.

[Jay Vosburgh (jvosburgh)]

Joe,

The issue has returned on my X220 tablet; running 4.13-0.36-generic and the fully updated 17.10 user space.

Every time it happens the laptop display freezes for about 10 or 15 seconds. A concurrent ssh session is unaffected.

[94261.464884] pipe A vblank wait timed out
[94261.464948] ------------[ cut here ]------------
[94261.465044] WARNING: CPU: 2 PID: 16697 at /build/linux-r9581B/linux-4.13.0/dr
ivers/gpu/drm/i915/intel_display.c:12848 intel_atomic_commit_tail+0xfa7/0xfb0 [i
915]
[94261.465046] Modules linked in: ccm rfcomm xt_CHECKSUM iptable_mangle ipt_MASQ
UERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 n
f_defrag_ipv4 xt_conntrack nf_conntrack libcrc32c ipt_REJECT nf_reject_ipv4 xt_t
cpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_
filter bnep binfmt_misc zfs(PO) zunicode(PO) zavl(PO) zcommon(PO) znvpair(PO) sp
l(O) intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irq
bypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc aesni_intel arc4 a
es_x86_64 crypto_simd glue_helper cryptd intel_cstate intel_rapl_perf snd_seq_mi
di snd_seq_midi_event snd_hda_codec_hdmi snd_rawmidi iwldvm mac80211 snd_hda_cod
ec_conexant snd_hda_codec_generic uvcvideo videobuf2_vmalloc videobuf2_memops vi
deobuf2_v4l2
[94261.465098] input_leds thinkpad_acpi snd_seq snd_hda_intel serio_raw wmi_bmo
f videobuf2_core btusb btrtl btbcm iwlwifi videodev btintel joydev bluetooth nvr
am media snd_hda_codec snd_seq_device snd_hda_core ecdh_generic cfg80211 lpc_ich
 snd_hwdep snd_pcm shpchp snd_timer mei_me mei snd soundcore mac_hid nfsd parpor
t_pc ppdev auth_rpcgss nfs_acl lp lockd parport grace sunrpc ip_tables x_tables
autofs4 i915 i2c_algo_bit drm_kms_helper syscopyarea e1000e sysfillrect wacom sy
simgblt ptp sdhci_pci fb_sys_fops ahci psmouse usbhid sdhci hid drm libahci pps_
core wmi video
[94261.465153] CPU: 2 PID: 16697 Comm: Xorg Tainted: P O 4.13.0-36-
generic #40-Ubuntu
[94261.465155] Hardware name: LENOVO 42992UU/42992UU, BIOS 8DET69WW (1.39 ) 07/1
8/2013
[94261.465157] task: ffff955d1d3845c0 task.stack: ffffaf29821bc000
[94261.465217] RIP: 0010:intel_atomic_commit_tail+0xfa7/0xfb0 [i915]
[94261.465219] RSP: 0018:ffffaf29821bf8a8 EFLAGS: 00010286
[94261.465221] RAX: 000000000000001c RBX: 0000000000000000 RCX: 0000000000000000
[94261.465223] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000246
[94261.465225] RBP: ffffaf29821bf960 R08: 000000000000001c R09: 6177206b6e616c62
[94261.465226] R10: ffffaf29821bf8a8 R11: 74756f2064656d69 R12: 00000000003c6b37
[94261.465228] R13: ffff955d3fa08000 R14: ffff955d3fbb9000 R15: 0000000000000001
[94261.465231] FS: 00007fa6fdfd0500(0000) GS:ffff955d5e280000(0000) knlGS:00000
00000000000
[94261.465233] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[94261.465235] CR2: 000055ccba6e9ba8 CR3: 0000000402762004 CR4: 00000000000606e0

[94261.465237] Call Trace:
[94261.465250] ? wait_woken+0x80/0x80
[94261.465303] intel_atomic_commit+0x3d5/0x490 [i915]
[94261.465331] ? drm_atomic_check_only+0x37e/0x540 [drm]
[94261.465352] drm_atomic_commit+0x51/0x60 [drm]
[94261.465367] restore_fbdev_mode+0x15e/...

[Joseph Salisbury (jsalisbury)]

@Jay, did it not exist in 4.13-0.35-generic? This bug kind of fell of the radar for a while, but it would be good to know when it came back. We can then bisect down the commit.

[Jay Vosburgh (jvosburgh)]

Joe,

I didn't try anything in between, I went from 4.13.0-16 to -36 and -36 started wigging out again so I backed down to -16. I can try some interim kernels next week when I don't need to do work on the laptop in question.

[Andy Whitcroft (apw)]

This bug was nominated against a series that is no longer supported, ie artful. The bug task representing the artful nomination is being closed as Won't Fix.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.