http://crunchbang.org – Does your " /etc/X11/default-display-manager " contain " /usr/bin/lightdm or /usr/sbin/lightdm " !run cat /etc/X11/default-display-manager .. to see what's in there there should be " /usr/bin/lightdm or /usr/sbin/lightdm .# what's your GPU in used , and the driver used fo it !# sudo lshw -C Video (HowTos)