This looks like bug 1631715. Do you use light-locker and have the nvidia driver installed too?
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1797085 Title: have to unlock 2-3 times after waking from suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xfce4-session/+bug/1797085/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs