Got your PM. If you could answer my PM questions here... Reread your first post.
If you tried to reset your screen brightness settings to an hour, thinking it was the screensaver timing out and blanking... and that didn't work. You were probably round-about-right. Being that is a bug with that module.
Try this. Open a terminal session <cntrl><alt><t>, and enter in this command:
If that fixes what is happening with you... To make that as a permanent work-around, open the "gedit" text editor, open the file ".profile". It will be in your "home" directory. Add a line at the end of the file and type in the same command. Save and exit. It will then do that command every time the desktop starts.
You could also just open a terminal session and say:
and it would do the same thing, but faster and no visual feedback.
echo "xset s 0 0" >> ~/.profile