I can confirm the above problem: I use a Vaio Z1 with ATI Radeon Mobility M6 LY running Dapper with all updates. There are regular complete lockups where only reboot is possible. When I change from the ati to the vesa driver the system becomes perfectly stable.
-- system freeze after clicking task manager trash icon in "pan" newsreader https://launchpad.net/bugs/36596 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
