Random crashes of X11

[Jon Schewe]

This seems to happen when opening a new window. Just when the new window is going to open my screen goes black and I see the last lines of the boot process like I switched to the first virtual terminal. I wait a second or two and then I'm back at the login screen. Xorg crash log attached. The report 1509846 seems to be very similar to the behavior of what I'm seeing. I've tried turning off the animations in compiz now and will see how it goes.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xorg 1:7.7+7ubuntu4
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.19.1-0ubuntu4
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
CurrentDesktop: Unity
Date: Sun Nov 1 07:48:09 2015
DistUpgraded: 2015-10-23 05:02:51,863 DEBUG enabling apt cron job
DistroCodename: wily
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 5.0.4, 3.19.0-31-generic, x86_64: installed
 virtualbox, 5.0.4, 4.2.0-16-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: CLEVO/KAPOK Computer Device [1558:0655]
MachineType: System76, Inc. Gazelle Professional
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic root=UUID=575ca223-36fe-4b42-b415-9a49c600d894 ro acpi_backlight=vendor acpi_os_name=Linux acpi_osi= i915.disable_power_well=0 quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to wily on 2015-10-23 (9 days ago)
dmi.bios.date: 06/13/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 4.6.5
dmi.board.asset.tag: Tag 12345
dmi.board.name: Gazelle Professional
dmi.board.vendor: System76, Inc.
dmi.board.version: gazp9
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: System76, Inc.
dmi.chassis.version: gazp9
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd06/13/2013:svnSystem76,Inc.:pnGazelleProfessional:pvrgazp9:rvnSystem76,Inc.:rnGazelleProfessional:rvrgazp9:cvnSystem76,Inc.:ct9:cvrgazp9:
dmi.product.name: Gazelle Professional
dmi.product.version: gazp9
dmi.sys.vendor: System76, Inc.
version.compiz: compiz 1:0.9.12.2+15.10.20151015-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.64-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4
version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
xserver.bootTime: Sun Nov 1 07:41:49 2015
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 933
 vendor LGD
xserver.version: 2:1.17.2-1ubuntu9

[aldebx (aldebx)]

Look like same symptoms of bug #1510970

Disable window animations in Compiz reduces the frequency of the crashes. Use compizconfig-settings-manager for this tweak (sudo apt-get install compizconfig-settings-manager)

I didn't run into this issue for several days after upgrading to kernel 4.3 from http://kernel.ubuntu.com/~kernel-ppa/mainline/
Please join me in testing this.

[Launchpad Janitor (janitor)]

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