Comment 2 for bug 156550

I have EXACTLY the same issue on a Dell C640. I attached this snapshot in another bug report. This is also a security issue because the screensaver (shown) does not cover the whole screen, even when "locked," allowing access to files outside of the area that Ubuntu "thinks" is the full-screen area - i.e., the area delineated by the top and bottom panels in your photo, and by the screen saver in fullscreen preview mode in this photo. Some people are reporting that there is a blank window in movie players when playing videos. I also have that problem - the picture doesn't "appear" unless I drag the window OUTSIDE of the panels shown. If someone doesn't have an external monitor supporting a larger resolution, they would not even have that option. This is a serious problem and it occurred after upgrading from Feisty to Gutsy on my laptop. Interestingly, it does the same thing with both a clean install AND with running from the liveCD. I never had this screen geometry problem with Feisty.