An unknown display appears in both the GNOME display manager and NVIDIA X Server Settings

[Ivan]

A short while after this clean installation of Ubuntu 24.04 LTS, a strange unknown display appeared both in GNOME Settings and in NVIDIA X Server Settings. I noticed it because I could see my mouse cursor disappear beyond the boundaries of my monitor as if it is being extended with a second one. In GNOME Settings it is listed as an"Unknown Display", but in NVIDIA X Server Settings, it appears as a PRIME display which is confusing since I am using a desktop configuration.

Currently, setting the second mirror to be mirrored seems to "fix" the issue, but it is a recurring problem.

The issue concerns an nVidia RTX 2080ti.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: nvidia-driver-535 535.171.04-0ubuntu2
ProcVersionSignature: Ubuntu 6.8.0-31.31-generic 6.8.1
Uname: Linux 6.8.0-31-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.28.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed May 15 00:24:20 2024
InstallationDate: Installed on 2024-05-12 (2 days ago)
InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424)
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 XDG_RUNTIME_DIR=<set>
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.

[Jhonny Oliveira (jhonny-oliveira)]

I have the same problem. I tested all drivers since nvidia-driver-535, including the latest one from https://launchpad.net/~graphics-drivers/+archive/ubuntu/ppa. So, at this point I'm not even sure this is driver related. Apparently, I had no issues with the same driver(s) in previous Ubuntu versions (<=23.10).

To avoid loosing the mouse into the ghost screen, I disable it every time I login: "xrandr --auto && xrandr --output None-1-1 --off".

Please, let me know if there is any other bit information I may provide to speed the resolution of this issue.

[Jhonny Oliveira (jhonny-oliveira)]

I think this is a duplicate of #2060268.