SonWon: can you include the output of: cat /proc/swaps
and does hibernate work for you if you do: sudo pmi action hibernate from a Terminal. Does the same command succeed any better if you do if from a terminal (Ctrl-Alt-F1). ** Changed in: linux-source-2.6.15 (Ubuntu) Sourcepackagename: linux-source-2.6.15 => acpi-support ** Changed in: gdm (Ubuntu) Status: Unconfirmed => Rejected ** Changed in: acpi-support (Ubuntu) Status: Unconfirmed => Needs Info -- GDM Choices Cause Sleep and Hibernate Failure https://launchpad.net/bugs/43114 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs