inspiron crashes unexpectadly few times per day in 12.04

[runner]

2013/06/24

1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> About Ubuntu
lsb_release -rd
Description: Ubuntu 12.04.2 LTS
Release: 12.04
2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center
I do not know what package is causing crash but syslogs is saying that drm (direct rendering manager) is generating errors.
3) What you expected to happen
I do not not expect any crashes.
4) What happened instead
computer crashes unexpectadly few times per day.
(5)
I sent the ubuntu-bug -w.
It was saying that this is new install of ubuntu. That is not correc. The ubuntu is here about 7 months.
(6)
 I see no files in /var/crash/

This person (see link) has very similar crashes so I would call it confirmation of a problem.
I believe that drm (direct rendering manager) is sick.

This link is a person showing same problems as I do implicating drm.
http://askubuntu.com/questions/300147/how-can-i-troubleshoot-why-ubuntu-keeps-crashing-on-my-laptop/312343#312343

My story.
I have DELL Inspiron 14z. Run Ubuntu 12.04. Gnome classic.
I have installed VMWare and other things.
Today I have uninstalled VMware tools, but I still see the errors, although so far in 6 hours the computer did not crash. That can change at any time.

Have been running 12.04 on this hw from the time I got the computer for about 7 months.
It was well behaved for most time.
Few weeks ago (May 2013?) it started to crash once a week and then started to crash more.
Some bad days crashes 3 times in one day.
I suspected heat problem and replaced fan+sink and also updated BIOS
 but the computer still crashed after those changes.
Ubuntu is updating itself every night.

My story is similar to Peter on the link above.
My computer worked fine, then few weeks ago started to crash
with either complete shutdown on frozen desktop.

At one time this was the last message in the log file before it
crashed completely.
I have two types of errors like Peter and both caused by drm (direct rendering manager).
As you can see from the gap in time this was the last error before system died.
<pre>
Jun 23 18:50:54 mycomputer bluetoothd[904]: Endpoint unregistered: sender=:1.32 path=/MediaEndpoint/A2DPSink
Jun 23 18:51:42 mycomputer kernel: [ 111.363166] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 17070000, was 17000000
//see time gap before reboot
Jun 23 18:55:31 mycomputer kernel: [ 340.123935] CPU2: Package power limit notification (total events = 229)
</pre>

But note that on that day I saw this error 6 times but the system crashed only 3 times.

I also like Peter have another error:
<pre>
Jun 23 19:21:55 mycomputer kernel: [ 36.323966] [drm] Driver supports precise vblank timestamp query.
Jun 23 19:21:55 mycomputer kernel: [ 36.324114] [drm:intel_dsm_platform_mux_info] *ERROR* MUX INFO call failed
</pre>

Both of these errors are caused by drm (direct rendering manager).

The sanitize_pm seems to be more correlated with crashes.
It occurred 6 times in one day. There were 3 crashes, 2 were dead computer,
1 was dead desktop). One of the 6 errors was the last log message before
computer died.

Thank you for listening.
If you need more info pls ask.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gnome-terminal 3.4.1.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-48.74-generic 3.2.46
Uname: Linux 3.2.0-48-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.3
Architecture: amd64
CheckboxSubmission: afe2ded547557fc4fff99d53b4a3c684
CheckboxSystem: d00f84de8a555815fa1c4660280da308
Date: Mon Jun 24 18:34:40 2013
ExecutablePath: /usr/bin/gnome-terminal
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-terminal
UpgradeStatus: No upgrade log present (probably fresh install)

[runner (runner2)]

I should learn how to spell. The title should say
inspiron crashes unexpectedly few times per day in 12.04.
If somebody can tell me how to change it I would.

[runner (runner2)]

Here is more info that I collected from the web that might be relevant.
https://bugs.freedesktop.org/show_bug.cgi?id=49811

http://ubuntu.5.x6.nabble.com/Precise-SRU-PATCH-0-1-Fix-Turbo-Mode-on-Gen6-Intel-Platforms-td5016709.html

http://lists.freedesktop.org/archives/intel-gfx/2012-July/019199.html

[Paul White (paulw2u)]

We are sorry that we do not always have the capacity to review all reported bugs in a timely manner. You reported this bug some time ago and there have been many changes in Ubuntu since that time.

Ubuntu 12.04 (precise) reached end-of-life on April 28, 2017.

Do you still see a problem related to the one that you reported in a currently supported version of Ubuntu? Please let us know if you do and in which version of Ubuntu otherwise this report can be left to expire in approximately 60 days time.

Thank you for helping make Ubuntu better.

Paul White
[Ubuntu Bug Squad]

[Paul White (paulw2u)]

Bug report won't expire due to bug watch
No reply to comment #4 after 50 days
Ubuntu 12.04 is EOL so report is no longer valid