i've run into this issue after upgrading--cpu usage is high and graphics rendering is slow. after disabling the proprietary nvidia driver everything went back t

i've run into this issue after upgrading--cpu usage is high and graphics rendering is slow. after disabling the proprietary nvidia driver everything went back to normal. there's a beta nvidia driver that claims to fix some of the problems, i'm trying it now: http://ubuntuforums.org/showthread.php?t=1577997 http://ubuntuforums.org/showthread.php?t=1577997