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[fsando <1213022@xxxxxxxxxxxxxxxxxx>]

Correction: 
Machine is Lenovo W520 with Nvidia/Intel graphics 
(not T520, don't know why I mistyped that)

I am in the closing stages of a large project with a serious deadline. I
will not be able to reinstall things until the end of September. I'm
really sorry. In this case it would entail switching from Kubuntu to
Ubuntu, redo my whole dev-setup and work with it for a several days to
make sure the issue was gone.

I can however test the kernels, and when my project is over I will be
happy to participate in more extensive testing - also future bugs.

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https://bugs.launchpad.net/bugs/1213022

Title:
  Detected a hung GPU, disabling acceleration.

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Kubuntu 13.04
  Thinkpad T520
  Bios: automatic (i.e. detect support for descrete graphics, though does not seem to detect anything)

  $uname -a
  Linux fk1304 3.8.0-27-generic #40-Ubuntu SMP Tue Jul 9 00:17:05 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

  Screen will regularly (typically 1-3 times a day) freeze for a few
  moments, then the acceleration is disabled.

  I have seen this happen in different situations:
  When switching between folders in dolphin
  When scrolling in FF
  When switching between desktops (I use kwin set up with a 9 desktops grid, no Compiz)
  When running a java app and a vmware virtual machine

  I have not found a certain way to make this happen, though it seems to
  be related to spikes of heavy activity.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: xorg 1:7.7+1ubuntu4
  ProcVersionSignature: Ubuntu 3.8.0-27.40-generic 3.8.13.4
  Uname: Linux 3.8.0-27-generic x86_64
  ApportVersion: 2.9.2-0ubuntu8.3
  Architecture: amd64
  Date: Fri Aug 16 12:32:17 2013
  InstallationDate: Installed on 2013-04-24 (113 days ago)
  InstallationMedia: Kubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130402.1)
  MarkForUpload: True
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)

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