Comment 7 for bug 744619

This is still an issue for me on 15.04. I have to alt-f1, log in and kill gnome-screensaver. Then I need to save everything and reboot because every few seconds the screen will turn black after doing this.

I don't use ecryptfs, I don't have several copies of gnome-screensaver running when this happens, and it's not a hibernation issue with me because it happens from a simple screensaver lock timeout - my music remains playing in the background.

It occurs about once per 30 or so screensaver locks, and usually Chrome is the only major thing I have open when my screen locks.