almost 1 and half year was working perfect. From February 2016, updates started broken/failed. last 15 days, every day user screen freezing. No mouse, no keyboard. I am using Live-USB and running below codes. sudo add-apt-repository ppa:yannubuntu/boot-repairsudo apt-get updatesudo apt-get install -y boot-repair && boot-repair After these commands I can reboot one time only. When I shutdown or restart laptop, it starts again same process. Best Regards, Serdar On Fri, Apr 8, 2016 at 2:06 AM, Timo Aaltonen