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.
** Package changed: xserver-xorg-video-intel (Ubuntu) => firefox
(Ubuntu)
** Changed in: firefox (Ubuntu)
Status: New => Triaged
** Summary changed:
- Xorg freeze
+ Firefox causing 100% X CPU load [Lucid]
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https://bugs.launchpad.net/bugs/872744
Title:
Firefox causing 100% X CPU load [Lucid]
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