Intel DRM GPU hang in Kubuntu 15.04

[Rohan Dhruva]

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)

[Rohan Dhruva (rohandhruva)]

Intel driver hangs every time KDE uses one of the special system effects.

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

[Rohan Dhruva (rohandhruva)]

Created attachment 115300
Error file dmesg told me attach

[Rohan Dhruva (rohandhruva)]

Filed ubuntu bug: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1447919

[Rohan Dhruva (rohandhruva)]

Filed upstream bug: https://bugs.freedesktop.org/show_bug.cgi?id=90159

[Rohan Dhruva (rohandhruva)]

Package version:

$ apt-cache policy xserver-xorg-video-intel
xserver-xorg-video-intel:
  Installed: 2:2.99.917-1~exp1ubuntu2build1
  Candidate: 2:2.99.917-1~exp1ubuntu2build1
  Version table:
 *** 2:2.99.917-1~exp1ubuntu2build1 0
        500 http://us.archive.ubuntu.com/ubuntu/ vivid/main amd64 Packages
        100 /var/lib/dpkg/status

[Mika-kuoppala (mika-kuoppala)]

The submitted batch is full of 0xffffffff

[Chris Wilson (ickle)]

And there's a small Y-tiled buffer just before the batch that is being written to.

[Rohan Dhruva (rohandhruva)]

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

[Christopher M. Penalver (penalvch)]

Rohan Dhruva, thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command, as it will automatically gather debugging information, in a terminal:
apport-collect -p xorg 1447919

Please ensure you have the package xdiagnose installed, and that you click the Yes button for attaching additional debugging information.