I thought I'd try to get to the bottom of this by killing gnome-screensaver, running gnome-screensaver --no-daemon --debug > screensaver.debug 2>&1 and then doing gnome-screensaver-command -a but when I did that, the screensaver worked correctly. I did some more experimentation and found that if I kill gnome-screensaver and start it again manually, then it works correctly.
If I can find out where gnome-screensaver gets started on login I could change that to enable debugging and see if that gets me any closer to an anwer. -- screensaver starts but shows only a black screen https://bugs.launchpad.net/bugs/60394 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs