When I write my user and password it goes all fine until I push the enter button. The screen goes grey, blinks a few times, again grey, then freezes like that.
So I push the reset buton and when its charge the shell again I have to turn off the computer and then turn it on again. Then, yes, Debian 9 starts normally.
Also the shell looks like it is in a diferent resolution. The resolution that I use is 1600×900 and the shell is on 1024x768.