Does this problem exist with vanilla upstream kernels ? Try installing these 2:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13.11.6-trusty/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.16.2-utopic/
Does this problem exist with vanilla upstream kernels ? Try installing these 2:
http:// kernel. ubuntu. com/~kernel- ppa/mainline/ v3.13.11. 6-trusty/ kernel. ubuntu. com/~kernel- ppa/mainline/ v3.16.2- utopic/
http://