I have installed Ubuntu 13.10 on a Fujitsu-Siemens Amilo Pro V2030D but I cannot boot into it. Even before the login screen appears I get an error message which says

"The system is running in low-graphics mode

Your screen, graphics card, and input device settings
could not be detected correctly. You will need to configure these yourself."

When I click "OK" it asks me what I want to do with the options being:

1) Run in low-graphics mode for just one session (nothing happens when I click these option, the computer just hangs witht the black screen)
2) Reconfigure graphics (asks me to use either default or backed-up configuration, neither option does anything)
3) Troubleshoot error (the only thing that works here is "review the xserver log file" which I dont understand)
4) Exit to console login (works but what do I do there?)

I have searched for solutions but these apear to be advising to reinstall graphics drivers and those are for Intel/AMD. According to the site of the manufacturer Amilo Pro has the VIA VN800 intergated graphics card. How do I install that?

When I was intsalling Ubuntu everything appeared to be ok with the graphics. Cant Ubuntu just use the same setting it did during installation?