Same problem on an Asus K60IJ laptop. There are numerous posts about this and many laptops affected by it. Windows had the same problem but it was fixed there by using updated Chacony drivers. There is a fix described in http://ubuntuforums.org/showthread.php?p=8925031#post8925031, but that's only a stopgap. A kernel repair is really needed.
Same problem on an Asus K60IJ laptop. There are numerous posts about this and many laptops affected by it. Windows had the same problem but it was fixed there by using updated Chacony drivers. There is a fix described in http:// ubuntuforums. org/showthread. php?p=8925031# post8925031, but that's only a stopgap. A kernel repair is really needed.