This is disconcerting. In the bug report some people have nVidia cards - ATI 
and Intel, and all with the same problem. A lot of people affected and 
apparently Ubuntu responsible  have no idea what could be the problem. I'm 
using Kubuntu 12.04 64bits and I have a nvidia card:
01:00.0 VGA compatible controller: nVidia Corporation GF108 [GeForce GT 430] 
(rev a1)

and I can not detect what is causing the freeze. The final lines of
kern.log I get are related always with "dri" and "nouveau" after the
freeze:

======
Sep 23 20:45:43 yafupc kernel: [ 5981.225699] [drm] nouveau 0000:01:00.0: 
PFIFO: unknown status 0x40000000
Sep 23 20:45:58 yafupc kernel: [ 5995.352503] [drm] nouveau 0000:01:00.0: 
PFIFO: unknown status 0x40000000
Sep 23 20:46:04 yafupc kernel: [ 6001.512805] [drm] nouveau 0000:01:00.0: 
PMFB0_SUBP0: 0x037f0040
Sep 23 20:46:04 yafupc kernel: [ 6001.512811] [drm] nouveau 0000:01:00.0: 
PMFB0_SUBP1: 0x037f0000
Sep 23 20:46:50 yafupc kernel: [ 6048.184954] [drm] nouveau 0000:01:00.0: 
PFIFO: unknown status 0x40000000
Sep 23 20:47:50 yafupc kernel: [ 6108.196017] [drm] nouveau 0000:01:00.0: 
PFIFO: unknown status 0x40000000
Sep 23 20:47:50 yafupc kernel: [ 6108.196017] [drm] nouveau 0000:01:00.0: 
PFIFO: unhandled status 0x00800000
======
Sep 24 17:41:06 yafupc kernel: [24326.885728] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 24 17:41:06 yafupc kernel: [24326.885736] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 24 17:41:06 yafupc kernel: [24326.885755] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 24 17:41:06 yafupc kernel: [24326.888564] [drm] nouveau 0000:01:00.0: 
PFIFO: read fault at 0x000d7e3000 [PAGE_NOT_PRESENT] from PGRAPH/GPC0/TEX on 
channel 0x0001799000
======
Sep 25 10:59:45 yafupc kernel: [ 7205.739725] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7205.739736] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7205.739762] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7205.856639] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7205.856651] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7205.856673] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7205.875555] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7205.875567] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7205.875590] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7205.885346] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7205.885358] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7205.885381] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7205.914156] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7205.914168] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7205.914190] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7205.935033] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7205.935046] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7205.935067] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7205.940093] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7205.940111] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7205.940135] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7205.951218] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7205.951230] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7205.951253] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7205.971454] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7205.971466] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7205.971486] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7205.981017] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7205.981030] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7205.981052] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7206.000106] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7206.000118] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7206.000139] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7206.012955] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7206.012968] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7206.012992] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7206.033133] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7206.033140] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7206.033149] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7206.041898] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7206.041906] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7206.041914] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7206.054946] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7206.054952] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7206.054961] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7206.066027] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7206.066033] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7206.066042] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7206.077169] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7206.077175] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7206.077184] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7206.088264] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7206.088270] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7206.088279] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7206.099255] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7206.099260] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7206.099270] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7206.110403] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7206.110410] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7206.110419] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7206.124644] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7206.124649] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7206.124658] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7206.136181] [drm] nouveau 0000:01:00.0: fail 
set_domain
Sep 25 10:59:45 yafupc kernel: [ 7206.136188] [drm] nouveau 0000:01:00.0: 
validate gart_list
Sep 25 10:59:45 yafupc kernel: [ 7206.136201] [drm] nouveau 0000:01:00.0: 
validate: -22
Sep 25 10:59:45 yafupc kernel: [ 7206.136583] [drm] nouveau 0000:01:00.0: 
PFIFO: read fault at 0x000d052000 [PAGE_NOT_PRESENT] from PGRAPH/GPC0/TEX on 
channel 0x0001ac0000
Sep 25 10:59:45 yafupc kernel: [ 7206.136592] [drm] nouveau 0000:01:00.0: 
PFIFO: unknown status 0x40000000
Sep 25 10:59:45 yafupc kernel: [ 7206.136617] [drm] nouveau 0000:01:00.0: 
PGRAPH: TRAP ch 3 status 0x01000000
Sep 25 10:59:51 yafupc kernel: [ 7211.439193] [drm] nouveau 0000:01:00.0: 
PGRAPH: TRAP ch 3 status 0x02000000
=====================

I've tried many versions of the Kernel (ubuntu patched and mainline) and I 
always get the freezes. I think in my case the problem most often occurs 
minutes after waking from sleep mode. But I'm not sure. Currently use X swat 
PPA repository.
In my case, only the mouse pointer moves but nothing responds. Alt + SysRq 
RSEIUB works for me.
Could it be that the problem is related to a common problem with dri on all 
cards?

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/993187

Title:
  ubuntu 12.04 completely freezes frequently.

Status in “linux” package in Ubuntu:
  Won't Fix
Status in “xserver-xorg-video-intel” package in Ubuntu:
  Won't Fix
Status in “linux” source package in Precise:
  Won't Fix
Status in “xserver-xorg-video-intel” source package in Precise:
  Won't Fix

Bug description:
  Update: 6/12/2012
  This bug is about a complete system lock-up. No other TTYs can be started. 
Mouse doesn't move. Keyboard doesn't react. The only solution is hard reset.

  Seems to happen on a variety of configurations, including nVidia, ATI
  and Intel graphics.

  If you are still able to TTY or SSH into other sessions, move the
  mouse or use the keyboard, file another bug.

  Thx. Joris V. (brains).

  Update: 5/21/2012
  Updating the kernel to 3.3.6 as suggested by Michael in #91, the system seems 
stable, no freezes yet in 5-6 hrs of using and watching videos for couple of 
hrs.

  Original description:
  I recently installed newly released ubuntu 12.04 LTS 64 bit version on my 
desktop. And it is frequently freezing, for the first few hours it ran smoothly 
and when I started watching videos it started freezing randomly.
  I have to use hard restart every time.
  Initially it was only during videos but now even during normal browsing it is 
freezing.

  I am using on board graphics and do not have any graphics card
  installed.

  Can someone please help me here, I really love the new looks of 12.04
  and it bugs me not being able to use :(

  Below is my hardware configuration:
  Processor: Intel CORE i3 processor (2nd generation)
  Board: Intel® Desktop Board DH67BL
  Ram: 4GB
  Graphics: On board
  HDD: 500 GB

  Please let me know if you need more information, or any specific logs
  I can capture (and how).

  Thanks,
  Ketan Patil

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