In my particular case, the problem turned to be this: https://bugs.freedesktop.org/show_bug.cgi?id=30872
and is (at least in the meanwhile) fixed by adding "radeon.modeset=0" to the kernel command line. ** Bug watch added: freedesktop.org Bugzilla #30872 http://bugs.freedesktop.org/show_bug.cgi?id=30872 -- firefox is very slow in Ubuntu 10.10 https://bugs.launchpad.net/bugs/576811 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