External monitor is very slow in 4k with Wayland + Nvidia Prime

[Jorge Sivil]

When using Wayland (fractional scaling or not, I use 150% but tried with 100%), the external monitor is very slow / laggy.

In my setup, I only use the external monitor.

Laptop has prime-select set to nvidia, and the Intel one is disabled in Bios.

I found out that in X11 this issue with the external 4k monitor doesn't happen.
This lag issue doesn't haven in the native laptop monitor also, in either Wayland or X11.

In order to get to X11, I have to first Log In, then Log Out, then X11 is automatically selected (on first log in, Wayland is used, and you only have Gnome or Ubuntu options, after log out, you have more options).

Please let me know what extra information you need.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: nvidia-driver-535 535.129.03-0ubuntu0.22.04.1
ProcVersionSignature: Ubuntu 6.2.0-36.37~22.04.1-generic 6.2.16
Uname: Linux 6.2.0-36-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Nov 6 09:55:49 2023
InstallationDate: Installed on 2022-07-02 (492 days ago)
InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
SourcePackage: nvidia-graphics-drivers-535
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.