Using the steps outlined by John Dong I was able to bypass gnome-screensaver version 2.20.0-0ubuntu4.2 with the -intel xorg driver so it seems not to be specific to the fglrx driver.
Using the steps outlined by John Dong I was able to bypass gnome-screensaver version 2.20.0-0ubuntu4.2 with the -intel xorg driver so it seems not to be specific to the fglrx driver.