unable to find Ubuntu display drivers for VIA onboard

Can you give the output of:

sudo lshw -C display

Thanks

Hi Marco, thanks for your help.
The output reads:
*-display UNCLAIMED
        description: VGA compatible controller
        product: KM400/KN400/P4M800 [S3 UniChrome]
        vendor: VIA Technologies
        physical id: 0
        bus info: pci@0000:01:00.0
        version: 01
        width: 32 bits
        clock: 66MHz
        capabilities: pm agp agp-3.0 bus_master cap_list
        configuration: latency=32 mingnt=2
        resources: memory:f0000000-f3ffffff(prefetchable) memory:f4000000-f4ffffff memory:f5000000-f500ffff(prefetchable)
Regards Glen

Error message on startup reads:
LOW GRAPHICS MODE
(EE) Chrome(0): No valid modes found
(EE) Screen(s) found, but none have a usable configuration.

Thanks and apologies to actionparsnip, I got the names mixed.

Monitor is the likely culprit, it is an Effinet Systems EFL 1501X (lcd screen).
I am unable to find drivers so far, only old versions and then, as a newcomer to Ubuntu, I am unsure of the methods needed to try changes.
It is confusing that the system only runs in low graphics mode, but is able to display a high quality image as desktop background.

Thise things need an xorg.conf file to be nice, if you sniff around online you will find sample files.You will need

gksudo gedit /etc/X11/xorg.conf

To get write access to the file.