Experienced the same issue on an older radeon card (radeon 8500) following an automated update of xserver-xorg-video-radeon (update manager suggestion). Solved the issue by adding some sections to the auto-configured xorg.conf. Notably changing to the older "XAA" AccelMethod appears to fix the issue:
Section "Device" Identifier "Radeon 8500" Driver "ati" BusID "PCI:1:0:0" Option "XAANoOffscreenPixmaps" Option "AccelMethod" "XAA" Option "EnablePageFlip" "true" Option "TripleBuffer" "true" EndSection Section "Monitor" Identifier "Configured Monitor" EndSection Section "Screen" Identifier "Default Screen" Monitor "Configured Monitor" Device "Radeon 8500" EndSection -- font corruption with xserver-xorg-video-ati driver https://bugs.launchpad.net/bugs/475428 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp