I had the exact same issue on a Lenovo Thinkpad 13 (Intel core i5 6200 with skylake graphics) with Linux Mint 18 (based on 16.04 xenial) running ubuntu kernel 4.4.0-21. Upgrading to kernel 4.4.31 from http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.31/ fixed it.
I had the exact same issue on a Lenovo Thinkpad 13 (Intel core i5 6200 with skylake graphics) with Linux Mint 18 (based on 16.04 xenial) running ubuntu kernel 4.4.0-21. Upgrading to kernel 4.4.31 from http:// kernel. ubuntu. com/~kernel- ppa/mainline/ v4.4.31/ fixed it.