apport information

** Tags added: reproducible ubuntu

** Description changed:

  Since sna acceleration of the intel display driver is enabled by default, I 
see two types of display distortions from time to time:
  i) windows have some times stippled borders,
  ii) xfce4-terminal shows distortions, when switching windows with alt+tab 
(view attachment).
  To reproduce it, open two terminals run some commands to fill them with text 
and switch between them via alt+tab a few times.
  
  I've found following workarounds to prevent this from happening:
  - switch to uxa via xorg.conf
  or
  - disable compositing in xfwm4
  - replace xfwm4 with another wm (tested with mutter, metacity)
  
  Details:
  Mobile 4 Series Chipset Integrated Graphics Controller (rev 7)
  xserver-xorg-video- intel: 2.21.6-0ubuntu4
  xfwm4: 4.10.0-4ubuntu1
  xfce4-terminal: 0.6.1-0ubuntu2
  --- 
  ApportVersion: 2.12.7-0ubuntu3
  Architecture: amd64
  CasperVersion: 1.336ubuntu1
  CurrentDesktop: XFCE
  DistroRelease: Ubuntu 14.04
  LiveMediaBuild: Xubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140107)
  MarkForUpload: True
  Package: xserver-xorg-video-intel 2:2.99.907-0ubuntu1
  PackageArchitecture: amd64
  ProcVersionSignature: Ubuntu 3.12.0-7.15-generic 3.12.4
  Tags:  trusty
  Uname: Linux 3.12.0-7-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
+ --- 
+ ApportVersion: 2.13.1-0ubuntu1
+ Architecture: amd64
+ CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
+ CompositorRunning: None
+ CurrentDesktop: XFCE
+ DistUpgraded: Fresh install
+ DistroCodename: trusty
+ DistroRelease: Ubuntu 14.04
+ DistroVariant: ubuntu
+ ExtraDebuggingInterest: Yes
+ GraphicsCard:
+  Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller 
[8086:2a42] (rev 07) (prog-if 00 [VGA controller])
+    Subsystem: Lenovo Device [17aa:2112]
+    Subsystem: Lenovo Device [17aa:2112]
+ InstallationDate: Installed on 2014-01-11 (0 days ago)
+ InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140107)
+ MachineType: LENOVO 2767WSD
+ Package: xserver-xorg-video-intel 2:2.99.907-0ubuntu1
+ PackageArchitecture: amd64
+ PccardctlIdent:
+  Socket 0:
+    no product info available
+ PccardctlStatus:
+  Socket 0:
+    no card
+ ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-1-generic 
root=UUID=aaef342f-8a39-4660-b8fd-c1fe9349d82a ro quiet splash
+ ProcVersionSignature: Ubuntu 3.13.0-1.16-generic 3.13.0-rc7
+ Tags:  trusty ubuntu reproducible
+ Uname: Linux 3.13.0-1-generic x86_64
+ UpgradeStatus: No upgrade log present (probably fresh install)
+ UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
+ dmi.bios.date: 10/17/2012
+ dmi.bios.vendor: LENOVO
+ dmi.bios.version: 7UET94WW (3.24 )
+ dmi.board.name: 2767WSD
+ 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:bvr7UET94WW(3.24):bd10/17/2012:svnLENOVO:pn2767WSD:pvrThinkPadT400:rvnLENOVO:rn2767WSD:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
+ dmi.product.name: 2767WSD
+ dmi.product.version: ThinkPad T400
+ dmi.sys.vendor: LENOVO
+ version.compiz: compiz N/A
+ version.ia32-libs: ia32-libs N/A
+ version.libdrm2: libdrm2 2.4.50-1
+ version.libgl1-mesa-dri: libgl1-mesa-dri 10.0.1-1ubuntu2
+ version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
+ version.libgl1-mesa-glx: libgl1-mesa-glx 10.0.1-1ubuntu2
+ version.xserver-xorg-core: xserver-xorg-core 2:1.14.5-1ubuntu2
+ version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu1
+ version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu10
+ version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.907-0ubuntu1
+ version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.10-1ubuntu1
+ xserver.bootTime: Sat Jan 11 13:41:34 2014
+ xserver.configfile: default
+ xserver.errors:
+  
+ xserver.logfile: /var/log/Xorg.0.log
+ xserver.outputs:
+  product id                               16438 
+  vendor                                     LEN
+ xserver.version: 2:1.14.5-1ubuntu2

** Attachment added: "BootDmesg.txt"
   
https://bugs.launchpad.net/bugs/1171411/+attachment/3946133/+files/BootDmesg.txt

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https://bugs.launchpad.net/bugs/1171411

Title:
  xfwm4 may show display distortions, when using compositing on intel
  with sna

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