I can confirm this too on a Acer TM 8000, but with 2.6.19 kernel(2.6.20 doesn't boot on my laptop)
It doesn't occurs it I use sysrq key to emergency reboot -- bad hard disk noise on shutdown https://launchpad.net/bugs/67810 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
