A simple removal of psmouse before the reboot seems to fix this problem. Thanks to HP support!
Edit /etc/init.d/halt & /etc/init.d/reboot and add a /sbin/modprobe -r psmouse on top. Diff: --- reboot.orig 2006-12-06 17:56:57.000000000 +0100 +++ reboot 2006-12-06 17:58:28.000000000 +0100 @@ -12,6 +12,8 @@ PATH=/usr/sbin:/usr/bin:/sbin:/bin +/sbin/modprobe -r psmouse + . /lib/lsb/init-functions do_stop () { --- halt.orig 2006-12-06 17:58:35.000000000 +0100 +++ halt 2006-12-06 17:58:50.000000000 +0100 @@ -14,6 +14,8 @@ PATH=/usr/sbin:/usr/bin:/sbin:/bin [ -f /etc/default/halt ] && . /etc/default/halt +/sbin/modprobe -r psmouse + . /lib/lsb/init-functions do_stop () { ** Changed in: Ubuntu Status: Confirmed => Fix Committed -- Clean shutdown prevents BIOS from accepting keystrokes https://launchpad.net/bugs/67293 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs