Hello
I tested my steam deck on a few games and the result is always the same, after about half an hour the game starts stuttering and is virtually unplayable.
When I use mouse, a gyroscope or a joystick as a mouse, the game stutters immediately after any input is sent, but when I use keyboards it stutter with a slight delay.
When nothing is pressed or when using the joystick or the gyroscope as a joystick, the frames are stable.
The problem only occurs in gaming mode using lutris. While using lutris on desktop everything works fine.
Link to lutrice log while playing Metro
https://paste.ubuntu.com/p/qX5JZWFHNX/