Problem: If you install XDM as light Login Manager, cause XDM offers not reboot/shutdown without Logon Access, XDM is very grey. Solution: – create JPG with your Display-Size (1024×768) – save it at /usr/share/X11/image.jpg – edit #sudo nano /etc/X11/xdm/xsetup – add line: xsetbg -onroot -fullscreen /usr/share/X11/image.jpg – install #sudo apt-get install xloadimage ..enjoy xdm..