Comment 2 for bug 431456

U100 same. I have this problem both on the log in screen and after log in to desktop. I can stop the screen flickering, and make the brightness widget stop flickering then disappear, by pressing the "right click" mouse pad bar (after the desktop is fully up) and holding it for 5-10 seconds. It is then necessary to delete the new empty folder created by the right click. I've no idea why this works, but it does. Hope it works for others. :)