The following setting in /etc/modprobe.d/radeon-kms.conf solved the problem for me (Thinkpad R51, Radeon RV250 [Mobility FireGL 9000]): options radeon modeset=0
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/586243 Title: Xorg freeze: "Failed to schedule IB" Radeon X1200 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/586243/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp

