The repl prints:

X Error: BadMatch (invalid parameter attributes)
X Error: BadValue (integer parameter out of range for operation)
X Error: BadWindow (invalid Window parameter)
X Error: BadWindow (invalid Window parameter)
X Error: BadWindow (invalid Window parameter)
X Error: BadWindow (invalid Window parameter)
X Error: BadWindow (invalid Window parameter)

(and a black window opens) thought I probably missed some libs and installed all the required ones to build JWM to no avail libxcomposite-dev libxrandr-dev libgl1-mesa-dev libxi-dev libxcursor-dev any ideas? (not a pressing issue, it is working fine in windows and I can try it there)

@U04TQR7C24D try this: https://github.com/HumbleUI/humble-starter

gives the same error

Looks like WSL is missing some X11 compatibility package. Do other GUI Linux programs run there correctly on your machine?

Or maybe it's as simple as setting DISPLAY=:0 in the env?

yeah, i suspect something like this too. xeyes and a simple java gui program works, maybe i need some opengl lib, i'll google a bit

seems to be an OpenGL issue with WSL and intel graphics drivers in Windows 10:man-shrugging:. (if somebody has the same issue: graphics config can be checked with glxinfo from package mesa-utils, this gives same error [Bad Value ...], so no humbleUI problem)

I actually had run JWM at least on WSL2 in the past. But it was non-trivial, required some WSL tweaks and some code changes

I don’t remember any details

And it was pretty bad anyways, certainly not good enough to develop Linux version full-time