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[Rohan Dhruva <rohandhruva@xxxxxxxxx>]

Mika, Chris: can I do something to remediate it?

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https://bugs.launchpad.net/bugs/1447919

Title:
  Intel DRM GPU hang in Kubuntu 15.04

Status in X.org xf86-video-intel:
  Confirmed
Status in xserver-xorg-video-intel package in Ubuntu:
  New

Bug description:
  Intel driver hangs every time KDE uses one of the special system
  effects. I can reliably reproduce it by pressing "Alt-Tab", for
  example. The only fix is to reboot the computer.

  Kernel version:
  $ uname -a
  Linux darkstar 3.19.0-15-generic #15-Ubuntu SMP Thu Apr 16 23:32:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

  
  -- Logcat output --

  [   47.675521] [drm] stuck on render ring
  [   47.676178] [drm] GPU HANG: ecode 7:0:0x00000000, in kwin_x11 [1519], reason: Ring hung, action: reset
  [   47.676180] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
  [   47.676180] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
  [   47.676181] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
  [   47.676182] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
  [   47.676183] [drm] GPU crash dump saved to /sys/class/drm/card0/error
  [   47.683468] drm/i915: Resetting chip after gpu hang

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2build1
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Thu Apr 23 23:40:38 2015
  InstallationDate: Installed on 2013-10-13 (557 days ago)
  InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Beta amd64 (20130925.1)
  SourcePackage: xserver-xorg-video-intel
  UpgradeStatus: Upgraded to vivid on 2015-04-24 (0 days ago)

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