Ubuntu
mutter package

New windows have confused sizing when monitors are set to different scaling factors

Bug #2026255 reported by Alfredo Matas
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
mutter (Ubuntu)
New
Undecided
Unassigned

Bug Description

I have 3 monitors, two QHD monitors and the screen of the laptop attached. I'm using Gnome-shell with the extensions disabled. If a window starts maximized it only takes a portion of the screen, if a window starts unmaximized it automatically doubles the size when it loses the focus. I have attached a small video of the behavior of the middle QHD monitor.

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: gnome-shell 44.2-0ubuntu1
ProcVersionSignature: Ubuntu 6.2.0-24.24-generic 6.2.12
Uname: Linux 6.2.0-24-generic x86_64
ApportVersion: 2.26.1-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu Jul 6 09:35:26 2023
DisplayManager: gdm3
InstallationDate: Installed on 2021-06-21 (744 days ago)
InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
RelatedPackageVersions: mutter-common 44.2-0ubuntu1
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to lunar on 2023-05-12 (55 days ago)

Revision history for this message
Alfredo Matas (amatas) wrote :
Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Thanks for the bug report. Please start by uninstalling all of these extensions:

'tiling-assistant@leleat-on-github', '<email address hidden>', '<email address hidden>', '<email address hidden>', 'freon@UshakovVasilii_Github.yahoo.com'

and then log in again. Does the bug still occur?

Changed in gnome-shell (Ubuntu):
status: New → Incomplete
Revision history for this message
Alfredo Matas (amatas) wrote :

I uninstalled them, logged in again, but I still have the same issue. Thanks for your support!

~ ❯❯❯ gnome-extensions list
<email address hidden>
<email address hidden>
<email address hidden>
<email address hidden>
<email address hidden>
<email address hidden>
<email address hidden>
<email address hidden>
<email address hidden>
<email address hidden>
<email address hidden>
<email address hidden>
<email address hidden>
<email address hidden>

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

What does this command return?

  gnome-extensions list --enabled

Revision history for this message
Alfredo Matas (amatas) wrote :

> What does this command return?
>
> gnome-extensions list --enabled

This command returns empty results. I have disabled all the extensions, even those that come with Ubuntu.

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Does the problem go away if you set both monitors to the same scale?

Revision history for this message
Alfredo Matas (amatas) wrote :

> Does the problem go away if you set both monitors to the same scale?

Indeed, if I set the 3 screens at the same scale (ie 200%) the problem goes away.

Daniel van Vugt (vanvugt)
affects: gnome-shell (Ubuntu) → mutter (Ubuntu)
Changed in mutter (Ubuntu):
status: Incomplete → New
summary: - New windows have weird behavior on the desktop
+ New windows have confused sizing when monitors are set to different
+ scaling factors
tags: added: multimonitor
Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Thanks. The issue sounds like it's in mutter's constraints logic so please report it at:
https://gitlab.gnome.org/GNOME/mutter/-/issues

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