Sorry, this is a WONTFIX for Ubuntu 22.04 LTS. Ubuntu 22.04 LTS uses gnome-control-center 41 which doesn't support setting a theme at all, except in an Ubuntu-specific patch. If you want the Ubuntu experience, use the Ubuntu session. If you want the GNOME experience, use the GNOME session but then you won't get Ubuntu-specific behavior.
This will be fixed in Ubuntu 22.10 which will include gnome-control- center 42 (or probably 43 actually). I think the best path forward here is for GNOME Tweaks to set the dark color theme preference when setting a dark theme, probably automatically. If that is done, we can backport that bugfix to Ubuntu 22.04 LTS. ** Changed in: gnome-control-center (Ubuntu) Status: New => Fix Committed -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1971097 Title: Cannot switch between light/dark theme in the GNOME session To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1971097/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs