Comment 5 for bug 1274822

@Alberto
1) /var/log/nvidia-prime-upstart.log -> http://paste.ubuntu.com/6875487/
2) /var/log/prime-offload.log -> thers no such log here so i posted /var/log/prime-switch.log -> http://paste.ubuntu.com/6875491/
3) /var/log/prime-supported.log -> http://paste.ubuntu.com/6875496/

4) /var/log/lightdm/lightdm.log -> http://paste.ubuntu.com/6875502/
5) /var/log/lightdm/x-0.log -> http://paste.ubuntu.com/6875503/
6) /var/log/lightdm/x-0.log.old -> http://paste.ubuntu.com/6875505/

So as i said before my booting ends with black screen. Tham if i press CTRL+ALT+F1 i can switch to console where login command shows up