Obviously for an activity timeout, this is less of a problem (STILL a problem, mind you, since something could accidentally get laid on the mouse.), but I want to be able to have a script periodically lock the session even when not idle. This bug prevents me from forcing a lock. Reproducible: Always Steps to Reproduce: 1. Click and hold a mouse button, e.g. the left one. 2. Simultaneously press Ctrl+Alt+L (or whatever shortcut you have installed. (alternately, run: qdbus --literal org.freedesktop.ScreenSaver /ScreenSaver Lock or qdbus --literal org.freedesktop.ScreenSaver /ScreenSaver SetActive bool:True Actual Results: The locker or screensaver fails to start. If using the last command (above), the output will be "true" instead of "[]". Expected Results: The locker or screen saver should activate. Observed on Ubuntu 13.10 (KDE 4.11.5), but I'm guessing this is a more widespread issue. If there's truly no way to programmatically force a session lock, I would consider this a major bug indeed.
*** This bug has been marked as a duplicate of bug 78871 ***