[bug#66295] [DOCUMENTATION] guix shell with graphical software on Xorg

[Timothee Mathieu]

Hello,

I am a guix beginner, slowly learning to use the shell command to make containers.

I tried to use the command from the documentation (https://guix.gnu.org/manual/en/html_node/Invoking-guix-shell.html)  to launch chromium with the advised command

guix shell --container --network --no-cwd ungoogled-chromium \
  --preserve='^DISPLAY$' -- chromium

but with Xorg this does not seem to work due to permission error, the error is "Authorization required, but no authorization protocol specified".

I solved the problem by sharing .Xauthority and exposing the associated environment variable, and then it works:

guix shell --container --network --no-cwd ungoogled-chromium  \
  --preserve='^DISPLAY$' --preserve='^XAUTHORITY$' --share=$HOME/.Xauthority -- chromium

I think this should be added to the documentation to help people that want to use guix shell with Xorg.

Best regards,

Timothée Mathieu