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I'm testing GNOME 3.14 on Wayland on ArchLinux and I would also like to test GTK+ on Wayland. To do so, I can set the following two env variables from terminal

export GDK_BACKEND=wayland CLUTTER_BACKEND=wayland

anf then run my app (i.e. nautilus) from terminal too. However I would like to set this session-wide so that I don't have to launch my apps from terminal. I think I cannot set them on .bashrc because they will break my standard GNOME on X session.

So where is the proper place to set those variables for GNOME on Wayland session ONLY?

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  • See unix.stackexchange.com/a/403196/23305 for setting session-wide environment variables under Gnome Wayland. In short, ~/.config/environment.d/. That said, I'm not sure there's a way to conditionally set variables. There is ${:-} and ${:+} substitution syntax that might be able help? Commented Nov 7, 2017 at 23:30

1 Answer 1

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I have found a way to do this.

Create (if necessary) a ~/.profile file and add the following:

WAY=$(ps -aux | head -n -1 | grep "/usr/bin/gnome-shell --wayland")

if [ -z "$WAY" ]; then
    echo X11
else
    export GDK_BACKEND=wayland
    export CLUTTER_BACKEND=wayland
fi

Logout and then login in your favorite session (either X or Wayland). By using looking glass you can check if your application is actually running on Wayland. See this.

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