All the systems specs can be found at the bottom.
Ubuntu 20.04 with
nvidia-driver-* is capped at 60 FPS on a 144hz screen. I’m aware this happens in a multi-screen setup with one screen being 60hz, but the problem persists even when there’s only the primary 144hz screen in use.
The problem goes away if I switch to the iGPU with
xserver-xorg-video-nouveau drivers. Everything is butter smooth, as it should be. Yet when I switch back to dGPU and
nvidia-driver-* drivers, the issue returns.
For a brief period of time, the issue went away. This happened after one of the
nvidia-*updates, though I can’t say exactly which one. For a while, everything worked as it should, but after the next update, the issue returned. I believe it was the update from
455.45that broke it again. Going back to the previous driver version (downgrading from
455.38) did not help. I have also tried purging all the
nvidiadrivers and reinstalling them and using
The mouse cursor can be rendered at 144 FPS. By default it’s also capped, but if I change the refresh rate in display settings back and forth, it temporarily becomes 144 FPS. It will reset back to 60 FPS after some time, and I’d have to change the setting back and forth again for it to resume being smooth.
xrandr --output eDP-1-1 --mode 1920x1080 --rate 144did not help.
System: Kernel: 5.4.0-58-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 Desktop: Gnome 3.36.4 Distro: Ubuntu 20.04.1 LTS (Focal Fossa) Machine: Type: Laptop System: Schenker product: XMG FUSION 15 (XFU15L19) CPU: Model: Intel Core i7-9750H Graphics: Device-1: Intel UHD Graphics 630 driver: i915 v: kernel bus ID: 00:02.0 Device-2: NVIDIA TU106M [GeForce RTX 2070 Mobile] vendor: Intel driver: nvidia v: 455.45.01 bus ID: 01:00.0 Display: server: X.Org 1.20.8 driver: modesetting,nvidia unloaded: fbdev,nouveau,vesa resolution: 1920x1080~144Hz OpenGL: renderer: GeForce RTX 2070 with Max-Q Design/PCIe/SSE2 v: 4.6.0 NVIDIA 455.45.01 direct render: Yes Info: Memory: 62.66 GiB
nvidia-bug-report.log.gz (404.6 KB)