Changing to Confirmed, since it has happened to me in two different laptops (thus nearly excluding hardware problems) and on a stock Ubuntu 6.06 installation.
** Changed in: linux-meta (Ubuntu) Status: Unconfirmed => Confirmed -- ata_piix problem with Intel ICH7 chipset https://launchpad.net/bugs/53754 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs