I have same problem on notebook HP650. But only with HWE kernel and Xorg. Sometimes wakeup of system is crashed (freeze).
Generic kernel 4.4 work without problem.
upgrade to HWE by: "sudo apt-get install --install-recommends xserver-xorg-16.04"
I have same problem on notebook HP650. But only with HWE kernel and Xorg. Sometimes wakeup of system is crashed (freeze).
Generic kernel 4.4 work without problem.
upgrade to HWE by: recommends xserver-xorg-16.04"
"sudo apt-get install --install-