Following the instructions here fixed my problem: http://ubuntu- utah.ubuntuforums.org/showthread.php?t=494673
-- Nautilus has trouble opening external volumes with power-saving feature https://bugs.launchpad.net/bugs/184511 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs