Duplicate bug 1876530 shows it can happen on an Intel-only system too.
** Summary changed:
- [nvidia] Ubuntu 20.04 Fractional scaling crops half the screen
+ Ubuntu 20.04 Fractional scaling crops half the screen
** This bug is no longer a duplicate of bug 1870736
[nvidia] Screen scaling 125% gives 200%, and sometimes extends off screen
** Changed in: mutter (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1875285
Title:
Ubuntu 20.04 Fractional scaling crops half the screen
Status in mutter package in Ubuntu:
Confirmed
Bug description:
I'm using Ubuntu 20.04 with a NVIDIA MX250. Firstly, nvidia-prime was not
working. Even when selecting nvidia only, it was using Intel HD Graphics.
[IMAGE1]
I've forced the use of NVIDIA as the primary GPU by creating
/etc/X11/xorg.conf.d/10-nvidia-drm-outputclass.conf with: Option "PrimaryGPU"
"yes" (seen here https://wiki.archlinux.org/index.php/NVIDIA_Optimus).
[IMAGE2]
This works, now nvidia-settings show all options (before was showing only
prime options, and nothing more - even when selecting NVIDIA Only).
But now, fractional scalling crops half of the screen. The funny thing
is that when I try to printscreen, on the picture it looks fine, but
in reality is not. I had to make a photo with my cellphone. As you can
see, elements don't fit the screen (Note firefox title bar, for
example).[IMAGE3]
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-shell 3.36.1-5ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Mon Apr 27 02:49:29 2020
DisplayManager: gdm3
InstallationDate: Installed on 2020-04-27 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
RelatedPackageVersions: mutter-common 3.36.1-3ubuntu3
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)
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