I have a Xinerama setup laid out with a laptop monitor and a larger external monitor. I noticed a strange behavior when xscreensaver-5.05 came out and I emerged it. It would run the screensaver on the top (external) but the desktop was exposed on the bottom. The mouse and keyboard were locked into the login, so it didn't completely leave the desktop insecure, but it was still not acceptable. I found a bug and patch via bugs.debian.org: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473681 I tested the patch in message #18. It is a clear one-liner and resolved my issue. Reproducible: Always Steps to Reproduce: 1.Xinerama flag set. 2.Two screens, a larger resolution on top and a smaller resolution on bottom. 3.xscreensaver-command -lock Actual Results: Blanked top screen. Expected Results: Blank both screens.
Applied into 5.05-r1, thanks.