ASRock P4VM890 Motherboard and Linux

Question

Hello allHave just installed the above motherboard as a replacement to a clapped out Gigabyte.I am using all my old hardware ...except for the AGP nVidia graphics card which is not compatible with the new MB (no AGP slot)I can only get the on board graphics card to work using VESA driver ...which is OK except for annoying flicker.Onboard graphics chip on the new motherboard is "VIA Unichrome Pro 3D/2D Graphics".Have tried to install the VIA driver with apt-get but get a broken packages message.Any tips please on getting the onboard graphics working or should I be looking at buying a PCI graphics card.My OS is Debian Sarge. Desktop is an older Intel P4 1.7Thanks in advance