I’ve had minimal success with the #pinephone dock on the #librem5. Sometimes the keyboard & mouse work. Less often the settings app recognizes the display, getting info about the monitor (resolutions, refresh rates, etc). I’ve never seen anything appear on the actual display.

Might be a clue? I used grim to grab settings app pics. On one, you can see the phone thinks it’s showing something, somewhere. Wasn’t expecting that. Maybe I can make this work?

Will experiment/research more later.