I can reproduce the problem on two computers, both running fully-updated
24.04 beta.
For me, the bug appears if all of these circumstances are met:
- /org/gnome/desktop/interface/gtk-theme is Ambiance or Radiance
- one of the windows is focused
- the Desktop Icons NG (DING) extension is enabled in extensions-manager
The first two matches earlier observations here, the third one looks
like new information.
As you toggle the DING extension, this vertical 1px wide bar quickly
rushes to/from the right edge of the screen. It suggests that it's not
that the background isn't drawn properly, it's rather that DING
explicitly draws this line on top of it (and shows a brief animation
when getting enabled/disabled).
This also aligns with the observation that a window needs to be focused
-- probably if focus is taken away from windows by clicking on the
background then DING receives the focus, and apparently it's DING's
unfocused state combined with Ambi/Radi themes that results in this
glitch.
I'm almost certain that this is a bug either in DING or in the Ambi/Radi
themes.
It's probably not related to the graphics card. One of these computers
has an NVidia (nouveau driver), the other one has ATI Radeon. Scaling is
probably unrelated, too. The glitch is seen on both Xorg and Wayland.
** Tags added: noble
** Also affects: light-themes (Ubuntu)
Importance: Undecided
Status: New
** Also affects: gnome-shell-extension-desktop-icons-ng (Ubuntu)
Importance: Undecided
Status: New
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Packages, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/1986450
Title:
Visual artifact 1px vertical white line right side of the wallpaper
Status in gnome-shell package in Ubuntu:
New
Status in gnome-shell-extension-desktop-icons-ng package in Ubuntu:
New
Status in light-themes package in Ubuntu:
New
Bug description:
After manually upgrading from 20.04 LTS to 22.04.1 LTS I find that
there is a 1px wide vertical white line on the desktop that appears
whenever an application has focus. It is on the right side of the
monitor, covering the background wallpaper but not the menu.
Workaround: in Displays, change scale to something else than 100% and then
change back to 100%. That white vertical line will stay at the former 100%
window size location until the Settings window is closed. It disappears when
the Settings is closed.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
DisplayManager: gdm3
DistroRelease: Ubuntu 22.04
InstallationDate: Installed on 2018-04-27 (1570 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
Package: gnome-shell 42.2-0ubuntu0.2
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 5.15.0-46.49-generic 5.15.39
RelatedPackageVersions: mutter-common 42.2-0ubuntu1
Tags: wayland-session jammy
Uname: Linux 5.15.0-46-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo www-data
_MarkForUpload: True
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