All OpenGL apps fail on WSLg. Dell laptop with external displays

[n1cholson]

On my Dell XPS 15 9500 laptop, I have a USB-C docking station with two displays attached. WSLg is installed and X applications work fine.
All OpenGL applications fail to run with a Bad Context error. Any idea why?

• When I run $ glxinfo -B
  name of display: :0
  X Error of failed request: BadValue (integer parameter out of range for operation)
  Major opcode of failed request: 148 (GLX)
  Minor opcode of failed request: 24 (X_GLXCreateNewContext)
  Value in failed request: 0x0
  Serial number of failed request: 58
  Current serial number in output stream: 59

• /dev/dxg does exist

• I've added the ppa and updated. Also ran $sudo apt install mesa (no effect)
  sudo add-apt-repository ppa:kisak/kisak-mesa

• I've installed the WSLg recommended drivers for both Nvidia and Intel

[n1cholson]

After three installs, each time I see the same result vis-a-vis OpenGL. I'm guessing the architecture doesn't support mixed GPU configurations. Since there are no suggestions for how to proceed, I think I'll wait for a later version of WSLg before trying it again.

[n1cholson]

Just reinstalled WSLg (for the 4th time)
Then installed the WSLg recommended Nvidia and Intel display drivers.
Then added export DISPLAY:=0 to .bashrc and then source'd it
Then ran wsl --update from an Admin power shell.
Annnnndd..... it still doesn't work:
$:$ echo $DISPLAY
:0
$:$ glxgears
Error: glXCreateContext failed
$:~$

What a shame.