xf86VTSwitch failed after chrome crashed (but not wedged?) the GPU

[Donarsson]

I was watching a flash video, if that helps.
I experienced a slight hang and switched to tty1 to check for error messages, where I found the following two:

[47315.472858] [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring
[47315.499808] [drm:i915_set_reset_status] *ERROR* render ring hung inside bo (0x1fa3000 ctx 2) at 0x1fa31c8

As I have this happen sometimes (about once a month) without further errors or noticeable effects, I switched back to my graphical session and continued, when the screen went black for a while and then went back to login, as usual when X would be terminated.

Without logging back in, I checked the running processes and there were several user processes of graphical applications still running even though the user wasn't logged in anywhere.

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: xserver-xorg-core 2:1.14.5-1ubuntu2~saucy1
ProcVersionSignature: Ubuntu 3.11.0-15.25-generic 3.11.10
Uname: Linux 3.11.0-15-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Mon Feb 3 01:13:37 2014
DistUpgraded: Fresh install
DistroCodename: saucy
DistroVariant: ubuntu
DkmsStatus:
 vboxhost, 4.3.6, 3.11.0-14-generic, x86_64: installed
 vboxhost, 4.3.6, 3.11.0-15-generic, x86_64: installed
ExecutablePath: /usr/bin/Xorg
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Device [1297:2020]
InstallationDate: Installed on 2013-10-29 (96 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
Lsusb:
 Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 001 Device 005: ID 05ac:0304 Apple, Inc. Optical USB Mouse [Mitsumi]
 Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: A15HV01 A15HV01
MarkForUpload: True
ProcCmdline: /usr/bin/X -core -gamma 0.7 :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
ProcEnviron:

ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-15-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
Signal: 6
SourcePackage: xorg-server
StacktraceTop:
 OsAbort ()
 ?? ()
 FatalError ()
 xf86VTSwitch ()
 WakeupHandler ()
Title: Xorg crashed with SIGABRT in OsAbort()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

dmi.bios.date: 09/02/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.04.QUA
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: HURONRIVER
dmi.board.vendor: INTEL Corporation
dmi.board.version: To be filled by O.E.M.
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.04.QUA:bd09/02/2011:svnA15HV01:pnA15HV01:pvrTobefilledbyO.E.M.:rvnINTELCorporation:rnHURONRIVER:rvrTobefilledbyO.E.M.:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: A15HV01
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: A15HV01
version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.46-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.2.1-1ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.2.1-1ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.14.5-1ubuntu2~saucy1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu10
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.904-0ubuntu2.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1
xserver.bootTime: Mon Feb 3 01:14:41 2014
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 12890
 vendor SEC
xserver.version: 2:1.14.5-1ubuntu2~saucy1

[Apport retracing service (apport)]

StacktraceTop:
 OsAbort () at ../../os/utils.c:1299
 AbortServer () at ../../os/log.c:770
 FatalError (f=f@entry=0x7f685e468722 "EnterVT failed for screen %d\n") at ../../os/log.c:908
 xf86VTSwitch () at ../../../../hw/xfree86/common/xf86Events.c:537
 WakeupHandler (result=result@entry=-1, pReadmask=pReadmask@entry=0x7f685e6f0600 <LastSelectMask>) at ../../dix/dixutils.c:423

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Chris Wilson (ickle)]

The root cause here is that the VT switch away from X fails [ioctl(xf86Info.consoleFd, VT_RELDISP, 1)] and the recovery mechanism of reacquiring DRM_MASTER also fails. I have no idea why.

If you can provoke this bug, stracing X may be useful.

[Launchpad Janitor (janitor)]

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