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I recently switched to Ubuntu 19.10 and started using that shiny On-demand mode from NVidia for Prime (Optimus laptops). I am using mostly default ubuntu settings.
I experience intense micro-stutters and a constant input lag, how should I go about fixing this issue ?
Steam is started using the following command : __NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia steam
Magix
Posted 2019-10-26T19:07:04.793
Reputation: 143
0
Changing my CPU Power Governor to Performance did the trick. It is on power-saving mode by default, which slowly scales up the power but scales it down quickly. I hope this can help others !
Magix
Posted 2019-10-26T19:07:04.793
Reputation: 143
-1
Which version of the Nvidia drivers are you using?
Based on https://askubuntu.com/q/1186234/925753, the default Nvidia driver in 19.10, the 430 series doesn't support the on-demand mode. You have to update to nvidia-driver-435. Assuming your nvidia driver doesn't work, you're gaming on the Intel GPU, which could be responsible for the micro stutters input lag.
Syfer Polski
Posted 2019-10-26T19:07:04.793
Reputation: 308
I am using nvidia-driver-435. dGPU support has been verified through multiple methods (command-line, in steam, and FPS difference). I have yet to try using v440 – Magix – 2019-11-09T16:13:02.157
I've done some testing and I get flashing on some textures on certain arenas in Rocket League, but I don't get any noticeable input lag except for a few seconds after switching to an Nvidia powered full screen application. You might be onto a performance bottleneck – Syfer Polski – 2019-11-11T00:23:29.297
Maybe. I just switched my CPU governor to performance, I'll reboot and test again. Drivers v440 didn't help. – Magix – 2019-11-14T14:10:22.217