Hello guys ,
I had A problem after upgrading from Kali 1.1.0a to Kali 2 .
after i rebooted the system ,
i had the black screen problem .. and couldn't see the log in screen so I Did the next
First of all ,,
i used my smartphone {GAlaxsy Note 3 N9005 }to provide internet to my laptop [it works on cm mod roms] ,, i gess you can just plugin a ethernet cable ,

1- log to recovery mod ,
PHP Code:
apt-get update 
when it's finish
PHP Code:
apt-get upgrade 
and then reboot and log normaly to kali
This method worked for me just now :3
and i hope it helps you too guys ..