Putting simply: Option "AGPSize" "32"
as suggested by Tormod doesn't work for me. gnome-appeareance-properties refuses to switch desktop effects on. If I add: Option "BusType" "PCI" desktop effects can be enabled but gdm is unstable: the screen gets all black if I open a few firefox windows. Increasing AGPSize to 64 works but I get a kernel panic few minutes after logon if I open several windows. To have a stable system I have to put all the options below in the Device section: Section "Device" Driver "ati" Identifier "Radeon 9200" Option "BusType" "PCI" Option "AccelMethod" "EXA" Option "MigrationHeuristic" "greedy" Option "AGPSize" "64" EndSection -- (Needs KMS) Background and full screen apps don't show up when Normal Visual Effects on (Radeon 7500) https://bugs.launchpad.net/bugs/444139 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs