It's probably bug 1874197, please still please follow the instructions
in comment #2 to be sure...
** Changed in: gnome-control-center (Ubuntu)
Status: Invalid => Incomplete
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https://bugs.launchpad.net/bugs/1874583
Title:
Setting fractional scaling beyond 125% causes segfault
Status in gnome-control-center package in Ubuntu:
Incomplete
Bug description:
Setting fractional scaling between 125% and 175% yields improper
behavior. When set to 125%, display will be scaled to 200%. Attempting
to use either 150% or 175% scaling causes gnome-control-center to
segfault. Selecting 200% scaling exhibits proper behavior.
Steps to reproduce the issue:
1. Enable the Fractional Scaling toggle under Displays in
gnome-control-center.
2a. Select 125% beside Scale, and press "Apply" at the top right. Display
should scale to 200% and the selected scale should also change to 200%.
2b. Select either 150% or 175% beside Scale and press "Apply" at the top
right. Monitor may possibly turn off for a few seconds, and
gnome-control-center will have segfaulted with scaling remaining at 100% when
it turns back on.
Release: Ubuntu 20.04 LTS
Package version: 1:3.36.1-1ubuntu5
Expected behavior: Display scaling set properly to fractional values
Exhibited behavior: Improper scaling with scale set to 125% and segmentation
faults with 150% and 175% scale
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-control-center 1:3.36.1-1ubuntu5
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: Thu Apr 23 21:17:22 2020
InstallationDate: Installed on 2020-04-23 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)
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