Some more details: This started to happen after upgrading to 12.04. It worked fine in 11.10.
I'm using a Dell Precision M4600 laptop. $ lsb_release -rd Description: Ubuntu 12.04 LTS Release: 12.04 $ uname -a Linux jodel 3.2.0-24-generic-pae #37-Ubuntu SMP Wed Apr 25 10:47:59 UTC 2012 i686 i686 i386 GNU/Linux $ cat /proc/cmdline BOOT_IMAGE=/vmlinuz-3.2.0-24-generic-pae root=UUID=1ca1cfd0-972c-4001-b544-c3c388e4250f ro rootflags=subvol=@ quiet splash vt.handoff=7 My bet is that this is some misconfiguration throwing a spanner into the works before the hibernate/suspend actually happens. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/983879 Title: Failed to hibernate session not authorized Acer Aspire 5750-9668 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/983879/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs