As this is a confirmed bug in hal, and could not have been caused by ACPI (as far as I know) I am rejecting this bug. Thanks for reporting it.
** Changed in: acpi-support (Ubuntu) Status: Unconfirmed => Rejected -- Logout screen appears twice [Feisty] https://launchpad.net/bugs/81227 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs