Please do not use DISPLAY env variable to detect we are in graphical session

[bigon]

Hello

Now that wayland exists and that the installer will get wayland support when switching to GTK3 it's probably interesting to not rely on the DISPLAY environment variable (which is X11 specific)

An other way should be found for this

[augiekim]

I'm not sure if this is correct, but it looks like XDG_SESSION_TYPE environment variable or loginctl show-session 2 -p Type is the only way to detect it?

[bigon]

Shouldn't you just try to initialize GTK and catch the exception if it fails?