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[Alex Valavanis <782718@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Binary package hint: xorg

After upgrading to Natty, I have noticed a problem with my graphics.
The desktop rendering becomes corrupted (see screenshot).  This seems to
happen at random after a couple of hours of use... I cannot find a
reliable way of triggering the bug.  Dragging the mouse across the
screen clears the corrupted rendering, and the desktop can be seen as
normal.  Application windows are generally not affected, although
sometimes artefacts of the corruption can be seen in areas of the window
(for example the menu bar).

I'm afraid I know very little about X, and how best to debug any
problems.  Please let me know if I can provide any extra information to
help with the debugging.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xorg 1:7.6+4ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-9.43-generic 2.6.38.4
Uname: Linux 2.6.38-9-generic x86_64
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
Date: Sat May 14 17:48:07 2011
DistUpgraded: Log time: 2011-04-28 15:13:16.608854
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 virtualbox-ose, 4.0.4, 2.6.38-8-generic, x86_64: installed 
 virtualbox-ose, 4.0.4, 2.6.38-9-generic, x86_64: installed
GraphicsCard:
 ATI Technologies Inc RV516 [Radeon X1300/X1550 Series] [1002:7187] (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:0402]
   Subsystem: Dell Device [1028:0403]
MachineType: Dell Inc. OptiPlex 755
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-9-generic root=UUID=51bb396c-38f8-4adb-b660-24026abe596b ro quiet splash nomodeset vt.handoff=7
Renderer: Software
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to natty on 2011-05-03 (11 days ago)
dmi.bios.date: 02/19/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.name: 0GM819
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA08:bd02/19/2008:svnDellInc.:pnOptiPlex755:pvr:rvnDellInc.:rn0GM819:rvr:cvnDellInc.:ct6:cvr:
dmi.product.name: OptiPlex 755
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2
version.ia32-libs: ia32-libs 20090808ubuntu13
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug corruption natty regression-update ubuntu

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https://bugs.launchpad.net/bugs/782718

Title:
  Screen corruption with ati graphics after dist-upgrade to natty