I'm running Ubuntu on a 9950x3d and 5090 and it is not slow. Games in Steam with Proton are buttery smooth.
One hiccup was I had to disable variable refresh rate because moving the cursor didn't "count" as a reason to update the screen, so moving the cursor on its own (rather than e.g. moving a window) looked choppy.
But a choppy mouse cursor isn't "slow".
Tip: if you have a performance problem, run Claude Code (or an AI agent of your choice) and ask it to investigate.
I'm running Ubuntu on a 9950x3d and 5090 and it is not slow. Games in Steam with Proton are buttery smooth.
One hiccup was I had to disable variable refresh rate because moving the cursor didn't "count" as a reason to update the screen, so moving the cursor on its own (rather than e.g. moving a window) looked choppy.
But a choppy mouse cursor isn't "slow".
Tip: if you have a performance problem, run Claude Code (or an AI agent of your choice) and ask it to investigate.