Happens on 32 bit install too. It has somethign to do with Xserver/ AGP settings of xserver , Freeze doesnt happen when we use Xgl.
Its specific to do with the 8756 drivers , I used to run Dapper on TNT2 card , then it never gave a problem. Feels like working on win-95 !! -- Dapper-64 bit UI Freeze, need hard reboot to get out https://launchpad.net/bugs/51089 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs