The permission was incorrect. It should have been in the group "shadow" to make unix_chkpwd work. Group permissions were changed after installing isc-dhcp-server. I'm filing a bug against that package.
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-screensaver in Ubuntu. https://bugs.launchpad.net/bugs/774273 Title: unlock screen no longer works -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
