My ThinkPad X32 experiences random lockups as well after upgrading to dapper. Apparantly, it is caused by xserver-xorg-driver-ati, because lockups no longer occur after switching to the vesa driver.
-------- Section "Device" Identifier "ATI Technologies, Inc. Radeon Mobility 9000 (M6 LY)" Driver "vesa" BusID "PCI:1:0:0" EndSection -------- I filed a bug report #55570 <https://launchpad.net/bugs/55570>. -- dapper system freeze https://launchpad.net/bugs/50687 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs