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My configuration is laptop (16" display with 4K resolution) with
external monitor (43", 4K) above it.
Steps to reproduce:
1. Boot Ubuntu 25.10 installation media
2. Open display settings – right click on desktop
3. Rearrange built-in display (#1) under external one (#2)
4. Confirm (optional)
5. Uncheck Fractional Scaling
6. Displays are back built-in (#1) left from external (#2)
Expected behavior:
After unchecking Fractional Scaling displays stay arranged #1 above #1.
ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: xorg (not installed)
ProcVersionSignature: Ubuntu 6.17.0-5.5-generic 6.17.0-rc7
Uname: Linux 6.17.0-5-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 25.10.2
CloudArchitecture: x86_64
CloudID: nocloud
CloudName: unknown
CloudPlatform: nocloud
CloudSubPlatform: seed-dir (/var/lib/cloud/seed/nocloud)
CurrentDesktop: ubuntu:GNOME
Date: Sun Jan 4 16:37:31 2026
LiveMediaBuild: Ubuntu 25.10 "Questing Quokka" - Release amd64 (20251007)
ProcEnviron:
LANG=C.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: mutter (Ubuntu)
Importance: Low
Status: New
** Tags: amd64 apport-bug questing wayland-session
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Display rearrangement resets after unseting Fractional Scaling
https://bugs.launchpad.net/bugs/2137424
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