OK, got a freeze with vmlinuz-2.6.24-19-generic. Alt-SysRq didn't work. Reset button needed. Attached is what was logged by netconsole.
** Attachment added: "screenlog.0" http://launchpadlibrarian.net/15515793/screenlog.0 -- gutsy amd64 freeze crash lockup https://bugs.launchpad.net/bugs/157777 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs