From my understanding, ideally you should not set two framerate limiters as they can interfere with each other.

This sounds extra convoluted though, what kind of input latency are we talking here? I have never noticed any input latency not messing around with “allow tearing” and letting the SteamOS frame/refresh rate limiter do its thing while keeping in-game Vsync set to off.

I appreciate the idea though, I might have to mess with this and test it out myself, but I feel like I’m especially sensitive to input lag and have never noticed any lag in any game I’ve played on my deck (granted I’m not playing fighting games).