!DarkPlaces not starting

I’ve tried getting !DarkPlaces to run on my RasPi4B, I have installed the khronos modules from riscosports using the !boot and !system folders, and changed the GPU memory to 128MB.

But it refuses to start and a screen with the following apppears:

vchiq_lib: RISC OS: Error returned by SWI in ‘vchiq_open_service’
*failed to add service – already in use?

The GPU changed for the RPi 4 so the Khronos module doesn’t support it.

Ah fair enough, that would make sense.