Public bug reported:
I am using Ubuntu 12.04 x86_64 on a Dell Latitude E6520 with Intel Sandy
Bridge CPU/GPU (no additional GPU).
The issue was not present on 11.10 and it started appearing only a few days ago
on 12.04.
So, until a few days ago, Ubuntu 12.04 was fine as well.
The computer freezes (Unity GUI) for a few seconds, no reaction to any
keyboard input, the cursor still moves, but no reaction on any mouse
buttons. Most of the time, the system recovers and continues to work as
before, sometimes it did freeze completely and required a "hard reboot"
(power off and on again).
If the system recovers, the following dmesg entries can be observed:
[..]
[ 4351.356564] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU
hung
[ 4351.356573] [drm] capturing error event; look for more information in
/debug/dri/0/i915_error_state
[ 4351.365648] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[ 4357.514587] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU
hung
[ 4357.514815] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[ 4647.526356] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU
hung
[ 4647.526600] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[ 4673.674039] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU
hung
[ 4673.674289] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[..]
Also, in case the system recovers, apport (GUI) pops up multiple times,
but never opens a browser window to actually file the bug. Using apport-
cli did work.
Regards, Linus
-8<-----------
$ lsb_release -rd
Description: Ubuntu 12.04.2 LTS
Release: 12.04
-8<-----------
$ uname -a
Linux rhenium 3.5.0-26-generic #42~precise1-Ubuntu SMP Mon Mar 11 22:17:58 UTC
2013 x86_64 x86_64 x86_64 GNU/Linux
-8<-----------
$ apt-cache policy xserver-xorg-video-intel-lts-quantal
xserver-xorg-video-intel-lts-quantal:
Installed: 2:2.20.9-0ubuntu2~precise2
Candidate: 2:2.20.9-0ubuntu2~precise2
Version table:
*** 2:2.20.9-0ubuntu2~precise2 0
500 http://de.archive.ubuntu.com/ubuntu/ precise-updates/main amd64
Packages
100 /var/lib/dpkg/status
-8<-----------
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xserver-xorg-video-intel-lts-quantal 2:2.20.9-0ubuntu2~precise2
ProcVersionSignature: Ubuntu 3.5.0-26.42~precise1-generic 3.5.7.6
Uname: Linux 3.5.0-26-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: amd64
Date: Wed Mar 27 20:45:37 2013
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64
(20130214)
MarkForUpload: True
SourcePackage: xserver-xorg-video-intel-lts-quantal
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: xserver-xorg-video-intel-lts-quantal (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug precise running-unity
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-intel-lts-quantal in Ubuntu.
https://bugs.launchpad.net/bugs/1161088
Title:
Computer freezes shortly (GUI) and sometimes freezes completely
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel-lts-quantal/+bug/1161088/+subscriptions
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