this post was submitted on 26 Dec 2025
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Linux Gaming
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It couldn't be running on the igpu, could it? No, you tried entirely disabling it. Did you somehow verify that it was disabled?
What are you using to monitor system resource usage while troubleshooting? Using both mangohud and nvtop would be good.
How long have you run the game for? It's unlikely to be this, but with some games I find you have to wait a second for the shader compilation to catch up and framerates to stabilize.
Also, the latest nvidia driver should be 590, not 580, and the 1660 should be new anough not to require staying on 580.