I'm having this problem on a Radeon HD 7870 on 14.04. It is supposedly fixed by a glyph cache fix in xserver 1.17. Unfortunately, the xserver in the upcoming Ubuntu 15.04 "Vivid Vervet" is still based on xserver 1.16.
** Changed in: xserver-xorg-video-ati (Ubuntu) Status: New => Confirmed -- 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/1314551 Title: 1002:130f [GIgabyte G1.Sniper A88X-CF] Font corruption To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1314551/+subscriptions _______________________________________________ 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