For me this happened after a copy of files from one partition to another (with cp).
The solution was: chmod +s /sbin/unix_chkpwd The cause was: the default options of cp don't keep setuid bits, -- Password works in virtual terminal but not in Gnome screensaver https://bugs.launchpad.net/bugs/435928 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is a bug assignee. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs