Error: X11

[dennisangemi]

• xeus-octave version: 3.0.5
• Operating System: WSL on Windows11

Description

I've tried to plot data but the kernel died

fatal: caught signal Segmentation fault -- stopping myself...

and from terminal I got:

GLFW Error: X11: The DISPLAY environment variable is missing (65544)
Cannot initialize GLFW
Run with XEUS 3.0.5

Could you help me? Thanks!

[rapgenic]

This is due to xeus-octave needing X11 to run. I think you have two possibilities here:

1. Install xvfb-run (virtual X11 implementation) and use it to run jupyter:

   $ sudo apt update
   $ sudo apt install xvfb
   $ xvfb-run jupyter lab  # or xvfb-run [whatever command you're using]

2. Enable X11 in WSL, see https://learn.microsoft.com/en-us/windows/wsl/tutorials/gui-apps for example. This is in my opinion the "cleaner" route, but I have never tried it as I don't use WSL.

[dennisangemi]

Grazie Giulio!

I followed https://learn.microsoft.com/en-us/windows/wsl/tutorials/gui-apps#install-x11-apps

sudo apt install x11-apps -y

but nothing changed.

So I tried

Install xvfb-run (virtual X11 implementation) and use it to run jupyter:

$ sudo apt update
$ sudo apt install xvfb
$ xvfb-run jupyter lab  # or xvfb-run [whatever command you're using]

and now:

• ✅ the kernel doesn't die
• ✅ I no longer get any X11 errors
• ❌ I can't see the plot :|

Thanks again for your time ;)

Addendum:

• I noticed that if I run (for example) plot(x,y) when notebook is "Not trusted" and then I switch to "Trusted", the plot magically appears... This procedure works only one time lol
• From File > Print preview I can see all the plots correctly ;)