Ubuntu
firefox package

  1. Bug #872744
  2. Comment #3

Comment 3 for bug 872744

Revision history for this message
Bryce Harrington (bryce) wrote : Re: Xorg freeze

High X CPU issues are almost always due to bugs in client programs where they make too many X requests (e.g. stuck in a loop). The fact that updating firefox resolved it for you supports this hypothesis.

Presumably a patch in the newer firefox solved it.