Random xorg crashes with i915

[Nikolas Hermann]

Xorg crashes randomly when opening new windows. Mostly when openening windows in thunderbird, but happens with other programs as well.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xorg 1:7.7+7ubuntu4
ProcVersionSignature: Ubuntu 4.2.0-17.21-generic 4.2.3
Uname: Linux 4.2.0-17-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: Mon Nov 9 09:03:32 2015
DistUpgraded: Fresh install
DistroCodename: wily
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 5.0.4, 4.2.0-16-generic, x86_64: installed
 virtualbox, 5.0.4, 4.2.0-17-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0102] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Fujitsu Technology Solutions Device [1734:11b9]
InstallationDate: Installed on 2015-11-03 (5 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: FUJITSU ESPRIMO E500 E85+
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-17-generic root=UUID=88b6fe84-314e-478c-a7a9-23f19bc47cee ro quiet splash vt.handoff=7
SourcePackage: xorg
UdevLog: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/02/2012
dmi.bios.vendor: FUJITSU // American Megatrends Inc.
dmi.bios.version: V4.6.4.0 R1.10.0 for D2991-A1x
dmi.board.name: D2991-A1
dmi.board.vendor: FUJITSU
dmi.board.version: S26361-D2991-A1
dmi.chassis.asset.tag: YLCS055516
dmi.chassis.type: 6
dmi.chassis.vendor: FUJITSU
dmi.modalias: dmi:bvnFUJITSU//AmericanMegatrendsInc.:bvrV4.6.4.0R1.10.0forD2991-A1x:bd04/02/2012:svnFUJITSU:pnESPRIMOE500E85+:pvr:rvnFUJITSU:rnD2991-A1:rvrS26361-D2991-A1:cvnFUJITSU:ct6:cvr:
dmi.product.name: ESPRIMO E500 E85+
dmi.sys.vendor: FUJITSU
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: Mon Nov 9 09:01:24 2015
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Power Button KEYBOARD, id 7
 input Logitech USB Laser Mouse MOUSE, id 8
 input HID 046a:0023 KEYBOARD, id 9
 input HID 046a:0023 KEYBOARD, id 10
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.17.2-1ubuntu9