Hmm, I couldn't figure out how to start a console on the live-CD, it seems as those are not enabled. And thus, I was not able to change X settings on the fly and test new ones. But back on the amd64 installation, I tried out beryl again and noticed that indeed it was not with default settings that it worked. I then removed Beryl, rebooted and checked that yes, _this_ is the setting that is required for compiz/beryl to work on at least Radeon X800: Option "XAANoOffscreenPixmaps" under the Device section in xorg.conf. Not even the often mentioned AddARGBGLXVisuals is needed. I still get random pauses, usually when switching windows, when using compiz, but at least it works so it's demoable.
However, when I booted from the Fedora's Live-CD again, I found no mention of such setting in their xorg.conf, only Device "radeon" and nothing more in the Device section. I wonder if they have patched the 6.6.3 xserver-xorg-video-ati driver somehow that Ubuntu's driver is not? ** Changed in: xserver-xorg-video-ati (Ubuntu) Sourcepackagename: xserver-xorg-video-ati => xorg ** Changed in: compiz (Ubuntu) Sourcepackagename: compiz => xserver-xorg-video-ati -- [feisty] desktop effects problem (ATI) https://launchpad.net/bugs/90184 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
