[Mir-on-Wayland] On GNOME/Wayland all windows open on first monitor

[AlanGriffiths]

With two monitors in use on GNOME/Wayland desktop run:

miral-app --wayland-host $WAYLAND_DISPLAY

Expect: a fullscreen miral-shell window appears on each output.
Actual: a fullscreen miral-shell window for each output appears the primary output.

[AlanGriffiths]

A quick look at the logs shows the fullscreen requests have different wl_outputs:

$ WAYLAND_DEBUG=client egmde --wayland-host $WAYLAND_DISPLAY 2>&1 | grep -e wl_output@13 -e wl_output@11
[2672554.762] wl_output@11.geometry(1920, 0, 520, 290, 0, "ACI", "ASUS VS247", 0)
[2672554.779] wl_output@11.mode(3, 1920, 1080, 60000)
[2672554.786] wl_output@11.scale(1)
[2672554.788] wl_output@11.done()
[2672554.791] wl_output@13.geometry(0, 0, 520, 290, 0, "ACI", "ASUS VS247", 0)
[2672554.801] wl_output@13.mode(3, 1920, 1080, 60000)
[2672554.808] wl_output@13.scale(1)
[2672554.810] wl_output@13.done()
[2672562.166]  -> wl_shell_surface@19.set_fullscreen(1, 0, wl_output@11)
[2672562.218]  -> wl_shell_surface@17.set_fullscreen(1, 0, wl_output@13)

[AlanGriffiths]

Note that it is possible to move a window between outputs (e.g. Meta+Shift+Right)

[RAOF]

It would not surprise me at all if GNOME Shell simply ignores the output parameter. It would likewise not surprise me if Shell ignored the method parameter, but it might be worth checking if this works setting the method to driver.

[AlanGriffiths]

It would not surprise me at all if GNOME Shell simply ignores the output parameter. It would likewise not surprise me if Shell ignored the method parameter, but it might be worth checking if this works setting the method to driver.

Worth a try, but doesn't help.

[AlanGriffiths]

Fixed by #2437