Hardware volume keys don't work on tablet unless (detachable) keyboard is connected
I am using GNOME 3.28.2 (on wayland) on a tablet with a detachable keyboard, and the tablet has three hardware buttons on it: the power button and the volume +/- buttons. When the keyboard is detached from the tablet, the volume +/- buttons don't work, i.e. they do nothing. When the keyboard it attached, they work as expected. Weirdly, I as far as I recall, keyboardless volume +/- was working before GNOME 3.28.