For the last week I fully reinstall Ubuntu about 4 times. I fed up of this - so I cry for help!
Whatever I tried nothing work: purge and reinstall ubuntu-desktop, nvidia-drivers, xorg-xserver and so and so on.
Please, see the screenshot for more information at the moment when Ubuntu freeze (while booting)
The last actions were to add ppa:xorg-edges and install the latest packages, but unfortunately it doesn't help - result the same as before - black screen. However for now messages appear immediately after freezing.
UPDATE: I don't know how to solve it and the answer is proposed I accepted only because there is no workaround ways.
The xorg-edgers are known for potentially breaking systems. You will need to boot into one of the recover modes (the one with networking available) and remove that package:
To get into the recovery mode, hold the left shift key down at boot time so that you see the Grub menu - choose the recovery option, and choose a terminal with network capability. This does take a short while to load and become operational.