I have same issue here. It started after on of the updates. ps auxf | grep screen :
gdm 1375 0.0 0.2 17524 4340 ? Ss May13 0:01 /usr/bin/gnome-screensaver panther 1531 0.0 0.3 18572 6900 ? Ss May13 0:02 /usr/bin/gnome-screensaver panther 1532 0.0 0.3 18572 6872 ? Ss May13 0:11 gnome-screensaver So, I have three screensavers, one for GDM, and two for my user. Also, two instances for my user have sequential PIDs, so they were launched simultaneously. -- unlock screen -dialog comes up twice https://bugs.launchpad.net/bugs/556255 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