For nvidia you can add the following to xorg.conf and still use beryl, should help a lot:
Section "ServerFlags" Option "AIGLX" "off" EndSection Note that only nvidia users can do that unless you don't want to use compiz or beryl anymore. -- Very hi CPU usage when refreshing a window. radeon driver https://launchpad.net/bugs/73473 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs