Hello! I installed CachyOS Handheld Edition on my Steam Deck 2 days ago and I immediately noticed that, in contrast to Nobara, the “Decoding Latency” statistic is very high (>= 200ms), causing a severely degraded performance.
Input does not seem to be affected; when connecting to the same host, at the same time, my laptop shows that the mouse cursor movement from my Steam Deck appears immediately.
It really does appear to only be a hardware decoding issue.
its currently on 24.2.2-4. I’ll try updating.
edit: curiously, the GUI package manager didnt pick up updates. i had to run pacman -Syuu to get updates. I’ll test again after updating and a reboot.
Still happens after update. It starts at 88ms, drops to 17ms for a bit, then increases to 173ms and beyond even during active gameplay. By the time I finished typing this message, it climbed to 177 and is steadily rising.
Then it dropped to 95ms. Then to 81. Then 71. Then 64.
You get the idea. This is way higher and more instable than I get in the exact same setup, but using software acceleration gives me a decoding latency of 11-12 ms, either idle or during gameplay.
Using hardware decoding with h.264 gives an initial latency of 24 (twice as much as software) and the same increasing latency symptom. Let me know if you need more information.
I have not yet, I will ask around to check if there’s a known reason why this would cause this. That’s the first install I’ve seen this problem on, so I assumed it was a CachyOS-specific issue.
I was able to do some more testing today and it seems to only happen when running moonlight inside the Steam Big Picture session. Running it from the desktop gives me a decoding time of 0.51ms.
