Ubuntu
xserver-xorg-video-intel package

  1. Bug #177492
  2. Comment #134

Comment 134 for bug 177492

Revision history for this message
Conn O Griofa (psyke83) wrote :

Following up on my previous post - the "force greedy" patch was disabled in version 2:2.3.2-2ubuntu2 of the intel driver (although only because it was causing a segmentation fault). I hope this patch doesn't get re-introduced, as my Intel 855GM seems pretty snappy using the "always" MigrationHeuristic - even scrolling with compiz enabled seems faster now.

I would suggest that during the development cycle, the migration heuristic is left untouched, as it seems the new release of the Xorg server has improved EXA performance with the default migration heuristic. I have been following the Xorg mailing list, and Xorg 1.5 (including the release candidates) use the "ExaOptimizeMigration" parameter by default, which supposedly improves EXA's "always" heuristic to match "greedy" in some cases.

If it causes slow-downs for too many users, however, then the (fixed) patch can be re-introduced later.