Hmm. Checked my junk folder and everything, but never seems to get the original mail. Oh, well.
For the public, here’s the important parts:
A few things we can try after looking at the diagnostics. The Intel drivers still look a little old, currently 126.96.36.19986 is installed and the most recent ones from Intel are 188.8.131.5218 that we can try: https://downloadmirror.intel.com/28646/a08/dch_igcc_win64_184.108.40.20618.exe
I just updated the driver, but no better.
Then for my knowledge, when the diagnostics were run, do you recall where the screen that is working was connected? To the 2K HDMI or the 4K HDMI port? And lastly for your knowledge, the HDMI 4K port is driven by the Intel graphics card in your laptop utilizing USB-C VESA Alternate Mode video output and the 2K HDMI port (and DVI port) are driven by the DisplayLink DL-6950 USB graphics chipset in the dock.
I was using the 2K port, but tested to see if the 4K port also still worked - unplugging one HDMI cable caused the other screen to come online and stay online, but then the original one wasn’t detected.
I just updated the driver, but no better. At that point I tried to do a manual cutover to the right-side (2K port) screen
I might also recommend “disconnecting” (within Windows display settings) the extended display(s) so that only the laptop screen is active. Then disconnect the dock, leave it disconnected, and reboot the system. Once it comes back, go ahead and try to extend the monitors again and see if that makes any difference. It sounds like we may be hitting a Windows issue where the display configuration has been left in a bad state. In addition, I can confirm that the DisplayLink reinstallation appears to have gone successfully as I now see DisplayLink 9.1.1462.0 is installed. So thanks for doing that!
I did as you said and found the 2k cable at the dock was loose! Once I fully seated that all was good again.
So, I’m guessing it was a combination up updates and finally finding the loose cable (apparently loosened during my troubleshooting) as a win.
Thanks for all the help!