I am having the same issue with my dual monitor setup. After I updated to 23.04, all new files downloaded to the desktop were placed on my primary screen, forcing me to either minimize all the windows, or open up the file manager and navigate to the desktop from there.
Using dconf Editor, I see there is a gnome extension named ding that handles these operations; however, there is no option for setting the "start-corner" to a secondary monitor. You can also set this option in the regular settings in Appearance -> Position of new icons -> Top Left, Top Right..., of course, still no option for a secondary monitor.
Going to what I assume is the projects git, I find this bit in the readme:
In Ubuntu, unfortunately, it is not possible to use it directly
because the internal desktop-icons-ng extension interferes. The only
way to update to the newest one is to install the package
"gnome-session" to be able to use the standard gnome shell session,
and there install the following extensions from extensions.gnome.org:
- Desktop icons ng
- Dash to dock
- Appindicator and KstatusNotifierItem support
That will allow to have the same experience than the original Ubuntu
desktop, but with the most recent versions of the extensions.
As well, I found this post in the issues section which is six months old and I can't tell if the issue has been fixed by reading over the HISTORY.md.
So, installing the gnome-session package and following the rest of the directions found in the readme might fix it, might not. Might break something. I hope someone with more knowledge on the subject can weigh in on this.
