Public bug reported:
This bug happens with dark mode enabled, whenever I open Settings with
Appearance pane open, or I enter Appearance pane from other panes in Settings.
Whenever I do so, the app theme for legacy GTK3 applications (those not
supporting the new GTK dark mode API) inadvertently changes to light mode. To
turn back dark mode on for legacy apps,
I have to use the toggle in Quick Settings, or click on any of the theme
circles.
Normally, the dark mode theme for legacy apps should not change whenever
Settings is opened with Appearance pane open, or Appearance pane is selected
from other panes in Settings, just like
GTK3 applications using the new dark mode API, and GTK4+libadwaita apps (which
are not affected by this bug).
A recording of the bug in action is attached along with this report.
Ubuntu release details:
Description: Ubuntu 22.10
Release: 22.10
Package details:
gnome-control-center:
Installed: 1:43.0-1ubuntu2
Candidate: 1:43.0-1ubuntu2
Version table:
*** 1:43.0-1ubuntu2 500
500 http://ae.archive.ubuntu.com/ubuntu kinetic/main amd64 Packages
100 /var/lib/dpkg/status
ProblemType: Bug
DistroRelease: Ubuntu 22.10
Package: gnome-control-center 1:43.0-1ubuntu2
ProcVersionSignature: Ubuntu 5.19.0-23.24-generic 5.19.7
Uname: Linux 5.19.0-23-generic x86_64
ApportVersion: 2.23.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sat Nov 19 17:32:30 2022
InstallationDate: Installed on 2022-09-24 (56 days ago)
InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64
(20220809.1)
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: gnome-control-center (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug kinetic third-party-packages wayland-session
** Attachment added: "Screen capture showing the bug in action. It shows two
apps: (Gufw (legacy GTK3), Software & Updates (GTK3 with new dark mode API
support), and Settings (GTK4+libadwaita)"
https://bugs.launchpad.net/bugs/1997147/+attachment/5631569/+files/Screencast%20from%202022-11-19%2017-42-54.webm
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Desktop Bugs, which is subscribed to gnome-control-center in Ubuntu.
https://bugs.launchpad.net/bugs/1997147
Title:
App theme for legacy GTK3 apps inadvertently changes to light mode
when Appearance pane in Settings is clicked/made active in Ubuntu
22.10
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https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1997147/+subscriptions
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