I have a friend who owns a computer manufactured by Medion and who
sports an MSI motherboard who has a SiS chipset.  The MSI motherboard 
seems to have ben made specially for Medion since it isn't 
referenced on MSI's site.  The problems is that the integrated ethernet
doesn't work at all under Linux be it with 2.4 or 2.6 kernel.  He can't 
ping or connect to other boxes.  His ethernet works when he boots
Windows.

I include the output of lspci