Hi,
Time ago, I use RetroArch with the Vulkan graphics driver on GNU/Linux, using KMS/DRM (no X11).
However, I can’t see the SwitchRes options in Settings->Video->CRT SwitchRes
So, is Vulkan capable of setting video mode and refresh rate by itself and SwitchRes is not necessary? Is there another way of setting a custom refresh rate for a core which I can save as an override? For example, the VirtualBoy core would need a ~50Hz video mode to avoid audio skew.
Thanks!
I haven’t used switchres with vulkan, myself, but I think it leverages some xrandr stuff outside of Raspberry Pi, so I don’t think you can do it without X11.
It does not show you the options because we use Wayland, it is only compatible with Xorg. I have used them in the 3 and I have not seen difference between the video, Vulkan, GL or Glcore drivers.
How comes? It’s perfectly possible to do videomode changes on KMSDRM with drmModeSetCrtc()
In fact, SwitchRes seems to be ready to work outside stinky X11:
This is a new implementation and I think the priority is to make it work well in X11. Anyway, the portability and the Nvidia driver have a lot to do.