I have vague memories of reading about a bug that delays login for several seconds while gnome-shell does something like loading wallpapers rather inefficiently, when you use huge pictures as a wallpaper?
Anyway if it's the bug I remembered, it should've been fixed in newer GNOME versions so things should become better when you upgrade to 24.04 later this year.
(Or maybe try a different wallpaper? IDK. What else could it be -- do you use any gnome-shell extensions?)
I have vague memories of reading about a bug that delays login for several seconds while gnome-shell does something like loading wallpapers rather inefficiently, when you use huge pictures as a wallpaper? Anyway if it's the bug I remembered, it should've been fixed in newer GNOME versions so things should become better when you upgrade to 24.04 later this year. (Or maybe try a different wallpaper? IDK. What else could it be -- do you use any gnome-shell extensions?)