The frame rate is capped at the display refresh rate with the Wayland SDL backend
Xonotic master is capped at the display refresh rate and ignores cl_maxfps values above this refresh rate with the Wayland SDL backend (SDL_VIDEODRIVER=wayland ./xonotic-linux-sdl.sh).
This happens on both Plasma and Gnome Wayland sessions.
With the X11 SDL backend (SDL_VIDEODRIVER=x11 ./xonotic-linux-sdl.sh), everything works as expected and the FPS can be higher than the screen refresh rate.
There are no issues on Xonotic 0.8.6 with the div0-stable branch. The FPS are uncapped, whether it runs on the Wayland or X11 SDL backend.
I'm not 100% sure this is a DarkPlaces issue, feel free to close the issue and ask me to open it somewhere else if necessary :)
Edited by Spike29