Just wanted to add that after hibernation is working again, USB drives still do not survive hibernation. They are just remounted on resume. Consequently, hibernation should fail if they cannot be unmounted before.
-- Unmount USB devices before hibernation https://launchpad.net/bugs/40397 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
