system crash when attaching external display

[Rob Latham]

After upgrading to 16.04, my thinkpad x1 carbon (3rd edition) freezes and reboots when I attach an external display.

Process:
- put laptop to sleep.
- come into work the next day
- open up laptop
- plug in external display
- observe bug

Expected behavior: I can attach the external display
Observed behavior: system shows black screen on both laptop and display and after a minute or two reboots. Laptop drives external display fine after reboot.

I ssh to the laptop from another machine and monitored /var/log/syslog, /var/log/Xorg.0.log, and ~/.xsession-errors. All I see in those files before the lockup is this, from Xorg.0.log:

[ 34289.447] (II) intel(0): Enabled output DP1-8
[ 34289.448] (II) intel(0): Enabled output DP1-1
[ 34289.460] (II) intel(0): resizing framebuffer to 2560x1440
[ 34289.482] (II) intel(0): switch to mode 2560x1440@60.0 on DP1-8 using pipe 0,
(0, 0), rotation normal, reflection none

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Fri May 13 09:24:07 2016
DistUpgraded: 2016-04-21 20:51:13,846 ERROR got error from PostInstallScript ./xorg_fix_proprietary.py (g-exec-error-quark: Failed to execute child process "./xorg_fix_proprietary.py" (No such file or directory) (8))
DistroCodename: xenial
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 5.0.18, 4.2.0-30-generic, x86_64: installed
 virtualbox, 5.0.18, 4.4.0-21-generic, x86_64: installed
 virtualbox, 5.0.18, 4.4.0-22-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Broadwell-U Integrated Graphics [17aa:2227]
InstallationDate: Installed on 2015-09-10 (245 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
MachineType: LENOVO 20BS0031US
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-22-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to xenial on 2016-04-22 (21 days ago)
dmi.bios.date: 05/08/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: N14ET29W (1.07 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20BS0031US
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN14ET29W(1.07):bd05/08/2015:svnLENOVO:pn20BS0031US:pvrThinkPadX1Carbon3rd:rvnLENOVO:rn20BS0031US:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.name: 20BS0031US
dmi.product.version: ThinkPad X1 Carbon 3rd
dmi.sys.vendor: LENOVO
drirc:

version.compiz: compiz 1:0.9.12.2+16.04.20160415-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Fri May 13 09:04:56 2016
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 4669
 vendor AUO
xserver.version: 2:1.18.3-1ubuntu2

[Rob Latham (rob-terizla)]

Sometimes, my laptop does not freeze. Just now I was able to see the external display upon my second attempt, and found 8 backtraces in dmesg:

[26529.773617] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* failed
 to enable link training
[26529.776319] [drm:intel_dp_link_training_channel_equalization [i915]] *ERROR*
failed to start channel equalization
[26529.778857] [drm:intel_mst_pre_enable_dp [i915]] *ERROR* failed to allocate v
cpi
[26529.845810] ------------[ cut here ]------------
[26529.845837] WARNING: CPU: 3 PID: 1780 at /build/linux-FvcHlK/linux-4.4.0/drivers/gpu/drm/i915/intel_display.c:12740 intel_modeset_check_state+0x5b3/0x8a0 [i915]()
[26529.845838] encoder detached but still enabled on pipe A.
[26529.845839] Modules linked in: cpuid pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) drbg ansi_cprng ctr ccm rfcomm bnep binfmt_misc uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel bluetooth intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel arc4 kvm snd_hda_codec_hdmi irqbypass crct10dif_pclmul crc32_pclmul aesni_intel iwlmvm aes_x86_64 lrw gf128mul mac80211 glue_helper snd_seq_midi snd_seq_midi_event ablk_helper snd_rawmidi cryptd input_leds joydev snd_hda_codec_realtek iwlwifi serio_raw snd_hda_codec_generic thinkpad_acpi nvram cfg80211 snd_hda_intel intel_pch_thermal snd_hda_codec mei_me snd_hda_core mei lpc_ich snd_hwdep snd_pcm shpchp snd_seq snd_seq_device snd_timer snd soundcore
[26529.845870] mac_hid parport_pc ppdev lp parport autofs4 ses enclosure uas usb_storage i915 i2c_algo_bit drm_kms_helper psmouse syscopyarea sysfillrect e1000e sysimgblt ahci fb_sys_fops libahci drm ptp pps_core wmi video fjes
[26529.845882] CPU: 3 PID: 1780 Comm: Xorg Tainted: G W OE 4.4.0-22-generic #40-Ubuntu
[26529.845884] Hardware name: LENOVO 20BS0031US/20BS0031US, BIOS N14ET29W (1.07 ) 05/08/2015
[26529.845885] 0000000000000286 0000000088216a49 ffff880034c97b08 ffffffff813e9c53
[26529.845887] ffff880034c97b50 ffffffffc027ca50 ffff880034c97b40 ffffffff81080fb2
[26529.845889] ffff8802443c4318 ffff8800356b1000 ffff8802443c4348 ffff8802443c4330
[26529.845890] Call Trace:
[26529.845895] [<ffffffff813e9c53>] dump_stack+0x63/0x90
[26529.845898] [<ffffffff81080fb2>] warn_slowpath_common+0x82/0xc0
[26529.845899] [<ffffffff8108104c>] warn_slowpath_fmt+0x5c/0x80
[26529.845916] [<ffffffffc020d483>] intel_modeset_check_state+0x5b3/0x8a0 [i915]
[26529.845932] [<ffffffffc0218bcb>] intel_atomic_commit+0x4bb/0x6f0 [i915]
[26529.845947] [<ffffffffc005cc47>] drm_atomic_commit+0x37/0x60 [drm]
[26529.845954] [<ffffffffc01719f6>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper]
[26529.845964] [<ffffffffc004be02>] drm_mode_set_config_internal+0x62/0x100 [drm]
[26529.845974] [<ffffffffc0050322>] drm_mode_setcrtc+0x3d2/0x4f0 [drm]
[26529.845981] [<ffffffffc0041712>] drm_ioctl+0x152/0x540 [drm]
[26529.845984] [<ffffffff81090a76>] ? __set_current_blocked+0x36/0x60
[26529.845992] [<ffffffffc004ff50>] ? drm_mode_setplane+0x1b0/0x1b0 [drm]
[26529.845995] [<ffffffff8122026f>] do_vfs_ioctl+0x29f/0x490
[26529.845997] [<...

[Rob Latham (rob-terizla)]

I tried an upstream kernel ( 4.4.12-040412-generic #201606011712 ). Attaching after suspend/resume no longer results in a crash.

The screen frequently fails to restore on the first try. dmesg has these lines in that case:

[drm:intel_mst_disable_dp [i915]] *ERROR* failed to update payload -22
[drm] GPU HANG: ecode 8:-1:0x00000000, reason: Kicking stuck wait on blitter ring, action: continue
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

But, in an improvement from the Ubuntu kernel, I can unplug and try again with success.

[Rob Latham (rob-terizla)]

The 'bios-outdated-1.13' tag confuses me.

It's true that I am running (dmidecode says...) Vendor: LENOVO Version: N14ET29W (1.07 )

but there is no mention of display fixes in the release notes that accompany n14ur12w (1.13).

I can update my bios but wanted to understand if the tag addition was for fixing a known issue or was something I should try to see if it helps.

As a reminder, Ubuntu-15.10 handled this display fine with the same bios version.

[penalvch (penalvch)]

Rob Latham, it's always best to run the latest BIOS when debugging issues as documented in https://help.ubuntu.com/community/ReportingBugs#Hardware_bug_reports_.28linux_kernel.2C_xorg.2C_sound.2C_etc..29 . Could you please advise?

[kay (kay-diam)]

I have the same issue on Ubuntu 16.04 4.4.0-34-generic and Lenovo x260

If it was suspended with two screens, it would not wake up.

[penalvch (penalvch)]

kay (kay-diam), it will help immensely if you filed a new report with Ubuntu by ensuring you have the package xdiagnose installed, and that you click the Yes button for attaching additional debugging information running the following from a terminal:
ubuntu-bug xorg

Also, please feel free to subscribe me to it.

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

[kay (kay-diam)]

Not sure whether it's related to xorg, but not intel driver or something else.

Here is my dmesg when I just boot the laptop with the attached dock station.

[kay (kay-diam)]

I don't know why my attachments were removed, but this issue was fixed by upgrading the kernel to http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8-rc6/

[Launchpad Janitor (janitor)]

[Expired for xorg (Ubuntu) because there has been no activity for 60 days.]

[kay (kay-diam)]

Why did you close the issue? I still have to power off my laptop instead of suspending.

[kay (kay-diam)]

Have resolved the issue by installing yakkety kernel:

sudo add-apt-repository ppa:canonical-kernel-team/ppa
sudo apt update
sudo apt install linux-image-generic-lts-yakkety