My Notebook was affected by this bug, too. And solved it from http://ubuntuforums.org/showthread.php?t=2181558
Here is the output of... cat /sys/class/dmi/id/product_name K501UX
My Notebook was affected by this bug, too. And solved it from http:// ubuntuforums. org/showthread. php?t=2181558
Here is the output of... cat /sys/class/ dmi/id/ product_ name
K501UX