Public bug reported:

Binary package hint: xorg

I have a rather old machine running a MythTV backend using a WinTV NOVA
T USB2 (93000 Rev B8A2) and it seems that randomly the system will lock
up completely.  I have done my best to work out if the freeze occurs
when recording or performing some function of the mythtv-backend but
based on the logs it seems that it can occur during a recording, during
a database update or when there is no activity at all.

I do have BOINC installed and running but disabling that so it does not
run at startup didn't seem to stop the problem; as the freeze occurs
randomly every few days I had to wait about a week but the system did
lock up without BOINC running at all.  My next fiddle was to change the
priority of the mythtvbackend process to be -3; this seemed to reduce
the frequency of the freeze occurring but it may have been psychological
as the occurance rate is so drawn out anyway.

One thing which triggered a freeze was using the ubuntu-bug program,
before the report that I am using to make this bug entry the system
froze while ubuntu-bug was off collecting information about the problem.
Again the mythtvbackend was running so I cannot discount this just being
coincidence.

Another symptom, which may just be how the thing works, is that the NOVA
T USB2 strays in "warm" mode during the crash and if I use the PC's
reset button to restart the system.  When the system comes up like this
the NOVA T is unresponsive and the red light on the from of it remains
lit.  If I power down the machine or pull the USB cord out from the NOVA
T then plug it back in after several seconds while the bios boot splash
screen is going then the red LED extinguishes and the device works fine
once Ubuntu has booted.

This is all a little scattered and probably unhelpful but I have tried
to hunt down answers to this problem myself and have run out of ideas
what to do next.  Please do let me know if there are any further
diagnostics that may be helpful.

lsb_release -rd
Description:    Ubuntu 10.04.1 LTS
Release:        10.04

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xorg 1:7.5+5ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-28.55-generic 2.6.32.27+drm33.12
Uname: Linux 2.6.32-28-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
CheckboxSubmission: 5d0602330b5d44cd5ded7b4846756bb0
CheckboxSystem: daed2f3d6643b4a84b4520a2427f8c2b
Date: Sat Feb  5 08:45:59 2011
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-28-generic 
root=UUID=f8cbb2f7-5b7c-46db-94bc-1802d312a175 ro quiet splash
ProcEnviron:
 LANG=en_GB.utf8
 SHELL=/bin/bash
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
dmi.bios.date: 08/16/2004
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 6.00 PG
dmi.board.name: MS-6570E
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO., LTD
dmi.chassis.type: 3
dmi.modalias: 
dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd08/16/2004:svn:pn:pvr:rvnMICRO-STARINTERNATIONALCO.,LTD:rnMS-6570E:rvr:cvn:ct3:cvr:
system:
 distro:             Ubuntu
 codename:           lucid
 architecture:       i686
 kernel:             2.6.32-28-generic

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug freeze i386 lucid

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https://bugs.launchpad.net/bugs/713551

Title:
  Xorg freeze; system locks and accepts no input, keyboard lights go out
  when key is touched

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