As a matter of fact adding the lines : Section "Extensions" Option "Composite" "disable" EndSection
was not enough to get my hardware rendering on my Radeon X300 video card to work neatly as on Dapper ; I still experienced some slight freezing effects with for example screensaver applications. The last update of "fglrx" installed seems to definetely fix the problem. Regards -- fglrx bug https://launchpad.net/bugs/67325 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs