1)there is no output…
2)I have installed ubuntu only,
OK, lets try it without the gksudo … does it still error if you run:
jockey-gtk
it run
And are there any NVIDIA drivers listed ?
nowhere says nvidia… only program functions and some a\other things …
Did a window open called “Additional Drivers” ?
no 
the problem:
The letters everywhere I write seem like they’re moving the time that i write… you know… but when they are written, they seem stable, but some pieces are like disappeared…
OK, now we’ve fixed the file system in your other topic … try running:
jockey-gtk
does a window open that lists NVIDIA ?
yes!
What is listed ?
NVIDIA accelerated graphics driver (version 173)
NVIDIA accelerated graphics driver (post-release updates ) (version 173-updates)
NVIDIA accelerated graphics driver (version current ) [Recommended]
NVIDIA accelerated graphics driver (post-release updates ) (version current-updates)
NVIDIA accelerated graphics driver (experimental beta)(version experimental-304)
OK, select the one called:
NVIDIA accelerated graphics driver (version current ) [Recommended]
by clicking on it to highlight it.
Then click the “Enable” button.
Wait until it’s finished (usually indicated by a green dot) and then reboot (properly) to test your graphics.
It’s important that you REBOOT … logging off/on isn’t enough
–
ok, it is being installed…
ok, i’ll restart!!
Okey dokey.
ok, i restarted and I saw a black screen. So I pushed alt+sysrq and reisub. I was waiting for some time and I saw the desktop but not the bar on the top(you know, the bar with the wireless etc).Anyway I didn’t do anything and now it turned to a black screen too.
Hmm …
what happens if you hit Ctrl+Alt+F2
do you go to a text console (white writing on a black background) asking you to log on ?
YES!!