Yes, sounds like this might be a feature rather than a bug. Tapping Shift repeatedly has special meaning :)
Scott, please check if you have Sticky Keys enabled: https://help.gnome.org/users/gnome-help/stable/a11y-stickykeys.html.en ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1730478 Title: using shift key to wake up display causes invalid password To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1730478/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs