Comment 2 for bug 1299719

I'm able to get the double lock screen issue simply by forcing a lock using CTRL+ALT+L (and in my case it runs a script that does the following):

#!/bin/bash
sleep 0.5
xset dpms force off
gnome-screensaver-command -l

Then when I come back to the computer (potentially after the normal idle time, I'm not certain) and unlock with my password, the desktop appears and 5-10 seconds later, the computer locks again automatically. Simply, if the computer isn't idle, it shouldn't lock (and unlocking should be enough to make it no longer idle).