Public bug reported:

Binary package hint: xorg

This bug is reproducible, but I could not find out what triggers it.
Sometimes after few hours, sometimes after several days the whole system
freezes. There is no report in the logfiles. It only happens, when the X
is in use. E.g. resize, switch between windows, or even pressing buttons
in a browser. Disabling drm, glx or recompiling the kernel did not fix
the issue. When the system hangs no remote login is possible, and if
there is a sound playing, the buffered part of it is looped. The CPU
usage is probably 100%, because if I wait, then the fan starts up. Could
it be an endless loop or something? Only hard reset helps.

Dell Inspiron 8100 with ATI Radeon Mobility 7500
OS: Latest Dapper (started after upgrading from Breezy)
Using ati driver.

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

** Description changed:

  Binary package hint: xorg
  
  This bug is reproducible, but I could not find out what triggers it.
  Sometimes after few hours, sometimes after several days the whole system
  freezes. There is no report in the logfiles. It only happens, when the X
  is in use. E.g. resize, switch between windows, or even pressing buttons
  in a browser. Disabling drm, glx or recompiling the kernel did not fix
  the issue. When the system hangs no remote login is possible, and if
  there is a sound playing, the buffered part of it is looped. The CPU
  usage is probably 100%, because if I wait, then the fan starts up. Could
  it be an endless loop or something? Only hard reset helps.
  
  Dell Inspiron 8100 with ATI Radeon Mobility 7500
- OS: Latest Breezy
+ OS: Latest Dapper (started after upgrading from Breezy)
  Using ati driver.

-- 
Random system freeze at window operations
https://launchpad.net/bugs/62747

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