Comment 19 for bug 363238

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In , Bugs-freedesktop-org (bugs-freedesktop-org) wrote :

a lot of people with radeon chips (including me) experienced serious performance issues after upgrading their machines to Jaunty. -> https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/363238

EXA seems to be the default, but the machines become generally very sluggish with Xorg using between 50 and 90% of CPU power. The common fix seems to be to use XAA acceleration instead.

Please take a look. Let me know if you need more information. Thank you.