Comment 2 for bug 780628

I've had this problem a couple times on my Toshiba A505-S6960, running a clean install of Ubuntu 11.04 64-bit alongside Windows 7. For me it doesn't occur very often when I leave it in screensaver for a while, but when it does happen I find that I cannot log back in and have to hold in my power button for a reboot. Very frustrating if you happened to have a lot of unsaved work open at the time it locks you out.