Comment 15 for bug 1615734

I'm having similar issues with the workstation dock, so I figured I'd add my details as well, in case it helps with debugging.

First of all, my setup:

OS: Ubuntu Gnome 16.04 LTS
NVIDIA driver version: 375.39
BIOS version: N1EET64W (1.37)
BIOS display setting: Discrete
Video card: 01:00.0 VGA compatible controller: NVIDIA Corporation GM107GLM [Quadro M1000M] (rev a2)
Kernel version: 4.8.0-41-generic
Display manager version: gdm3 3.20.1
GNOME shell version: GNOME Shell 3.20.4

If I plug my external monitor directly into the laptop, I have no issues whatsoever. As soon as I try running with one plugged into the dock, the display just constantly switches back and forth between the laptop screen by itself and both screens. Sometimes, I can boot fine with a display plugged into the dock, but as soon as anything changes, like the displays idling or changing a display setting, it starts flickering again.

I've attached my /var/log/Xorg.0.log, which confirms this behavior.

For this log dump, I did the following:
1. Powered on the laptop in the dock, with a single monitor plugged into the dock via HDMI.
2. Everything comes up fine and both monitors are working.
3. In this case, I just locked the screen, which causes the monitors to dim and turn off.
4. As soon as that happened, the flickering started up again
5. Unplugged the monitor from the dock, so I could use the computer again

The log file shows that, for some reason, the module is constantly "Setting mode" between the two different configurations.