*  Po Lu <luangruo@yahoo.com> <87ee6md3g9.fsf@yahoo.com>
Wrote on Thu, 09 Dec 2021 08:31:02 +0800
> Madhu <enometh@meer.net> writes:
>> Hello, it is meant to make (select-frame-set-input-focus) "work" on
>> wayland for the time being.  It is not a correct fix.  (x-focus-frame
>> $a t) will raise the frame when it should not be raised.
>
> That's because the GDK developers, in their infinite wisdom, think that
> windows shouldn't give the input focus to themselves without also
> presenting themselves.
>
>> The problem I believe is that the gdk/gtk apis to raise/lower windows
>> just doesn't work on wayland. Implementing frame_raise_lower_hook with, say
>>       gdk_window_raise (gtk_widget_get_window (GTK_WIDGET (FRAME_GTK_OUTER_WIDGET (f))));
>> has no effect.
>
> If it doesn't work on Wayland, at least it will work on X-Windows, or
> Broadway, or some other window system supported by GDK.
>
> I see no reason to keep it unimplemented.

FWIW this is the patch I tried, which failed