Great! I can confirm that, after upgrading to gnome-screensaver 2.17.4-0ubuntu2 _and_ rebooting, the problem was solved for me. Thanks a lot.
-- screen does not unlock after locking https://launchpad.net/bugs/76632 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
