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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https://bugs.launchpad.net/bugs/1986450
Title:
Visual artifact 1px vertical white line right side of the wallpaper
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