Post your xorg file from /etc/X11/ first. If the GUI is too messed up to achieve this, you should be able to use a virtual terminal.
That's a good way to start diagnosing the problem.
You say I810 is the right driver, so you have intel 8xxx onboard graphics?
your description of
all I know is that the desktop shows a fine line on top and nothing works
isn't terribly helpful. A screenshot would be nice.
The should also be an xorg log in /var/logs/ or /etc/X11 that you could look at too