X segfaults when I toggle fullscreen mode in XBMC

[Marius Gedminas]

Steps to reproduce

1. Launch xbmc (I use version 2:12.3~git20131213.0944-frodo-0precise from http://ppa.launchpad.net/team-xbmc/ppa/ubuntu/)
2. Press \ a few times to toggle fullscreen mode

What happens: X segfaults and I'm thrown back to the login screen. (xbmc also segfaults, but I don't care as much about that. It should not be able to bring X down.)

Apport failed to attach certain unnamed log files because this is a user account with no privileges (with autologin enabled). I will attach them if you can tell me which ones are important. E.g. dmesg doesn't contain anything about the X segfault (it mentions xbmc-bin segfaulting though), while /var/log/Xorg.0.log.old has a (useless-looking) backtrace.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xserver-xorg-core 2:1.11.4-0ubuntu10.14
ProcVersionSignature: Ubuntu 3.2.0-57.87-generic 3.2.52
Uname: Linux 3.2.0-57-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.0.1-0ubuntu17.6
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: None
CurrentDmesg:
 Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
 dmesg: write failed: Broken pipe
Date: Fri Jan 10 08:28:13 2014
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, even including gdb or git bisection work if needed
GraphicsCard:
 Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:20e4]
   Subsystem: Lenovo Device [17aa:20e4]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MachineType: LENOVO 7458B19
MarkForUpload: True
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-57-generic root=UUID=de1a857a-0b15-4788-bfef-e322f9b7cd8c ro quiet splash vt.handoff=7
SourcePackage: xorg-server
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/13/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 6DET71WW (3.21 )
dmi.board.name: 7458B19
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:bvr6DET71WW(3.21):bd12/13/2011:svnLENOVO:pn7458B19:pvrThinkPadX200:rvnLENOVO:rn7458B19:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 7458B19
dmi.product.version: ThinkPad X200
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.7.12-0ubuntu3
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.46-1ubuntu0.0.0.1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.4-0ubuntu0.7
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.4-0ubuntu0.7
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.14
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1.2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4.4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build3