bug#69182: home-xmodmap-service-type requires restart to work

[Nicolas Graves]

Maybe that's because x11-display take a few milliseconds to start, and
that xmodmap actually starts before x11-display is actually done
loading.

I've encountered this type of issue with emacs-server, where I used this
solution on RDE, but it's emacs/service specific :
https://lists.sr.ht/~abcdw/rde-devel/patches/48753

I can't help you more, I don't use x11 anymore, but if that's the issue,
maybe go through the x11 documentation, find if you can start it with a
pid file, and if that's the case, you can try using a background
shepherd process waiting for the pid-file instead of a foreground one.

-- 
Best regards,
Nicolas Graves