Comment 19 for bug 1597267

Current xenial linux-image-4.4.0-62-generic remains broken, with dmesg WARNs on CRTC clocks and then system hangs when switching user sessions (which invokes some gnome-session xrandr setup). Lost the exact dmesg on the system hang.

Current mainline 4.8.x (4.8.17-040817-generic) continues to behave nicely, although there's occasionally some delays when docking/undocking before the xrandr configuration updates.

The 4.8 kernel is also included in the 16.04.02 HWE release, and a quick test with linux-image-4.8.0-36-generic seems to also behave reasonably well. I would tentatively consider this issue fixed in 16.04.02, although I still need to test with xserver-xorg-hwe-16.04.

Will also test with the newest mainline 4.10 release when I have the chance.