The issue still persists in Ubuntu 20.04. Running mate with lightdm and light-locker configured to lock-on-suspend enabled. After resuming, the desktop contents before suspend are visible for roughly 5 seconds, before the lock screen appears.
As this is absolutely unacceptable in terms of security and privacy, I'm using the following script to suspend (thanks to gethin for the pointer!): #!/bin/bash mate-screensaver-command -l systemctl suspend -- 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/1280300 Title: Desktop contents displayed on resume, before lock screen is shown To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/1280300/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
