I can confirm this, on dapper around flight6. Indeed, hibernation doesn't work:
$ lshal | grep can_suspend power_management.can_suspend_to_disk = false (bool) power_management.can_suspend_to_ram = true (bool) => Solution: Don't show the hibernate button if it's not supported. Only sleep is supported for ibooks so far. ** Changed in: gnome-panel (Ubuntu) Status: Unconfirmed => Confirmed -- Hibernate button does nothing (iBook G4) https://launchpad.net/malone/bugs/36663 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs