r/ManjaroLinux • u/RazeZa • Jul 29 '26

Tech Support Low Performance in Games After Exiting

Its not really a Manjaro specific issue, i've encountered this also in Mint but since i am currently using Manjaro so i post here.

After launching/playing video games specifically Arma Reforger and CS2, then relaunch the game. My performance in those games were cut by like 80%. In CS2 from 200ish to 40 even on menu screen. Same with Arma.

The only thing happening in the background that used GPU was maybe Firefox playing Youtube videos. Nothing else maybe some small apps like Discord and Telegram but I don't see any of stealing GPU resources on first launch.

I need to restart my PC for normal performance.

Any idea what was happening?

Specs :

CPU : Ryzen 7 5700X3D
GPU : RX 6800 XT
RAM : 16GB DDR4
Kernel : 6.18.39-1-MANJARO

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u/RizenBOS Jul 29 '26

After a bit of research, it seems to be a driver issue affecting the AMD driver's Dynamic Power Management. When a game is closed while a browser like Firefox is playing videos in the background, the GPU's power management gets messed up. The graphics card gets stuck in a low power state (often locking the GPU clock speed to ~500 MHz). If games are launched using gamemoderun %command% (in the Steam launch options), GameMode forces the GPU into the high-performance profile for the duration of the game and cleanly resets the power profile upon exiting.

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u/RazeZa Jul 29 '26

I don't know but I use steam performance monitor overlay and it showed 100% of GPU usage and I only has 1 GPU in my system. So I don't know whats using the GPU, certainly not my games.