Yesterday i upgraded from Debian 10 cinnamon to the Debian 11 cinnamon and the problem is that i have black screen for at least 30 seconds after i enter user name and password. First i just added debian 11 repos to my sources.list and that way i upgraded my system but since i saw this problem i did fresh install but still problem is there. I tried different desktop enviorments and they don't have any problem like this (so i assumed it is cinnamon bug or something). I disabled NetworkManager-wait-online.service and Cinnamon Settings Daemon - xrandr from startup applications. Nothing works. Cinnamon Version: 4.8.6 Graphics Card: GeForce GTX 960 with proprietary driver (460.91.03)