VIA/S3 Unichrome device IDs

[Philip Prindeville]

Zoltan Boszormenyi wrote:

> Hi,
>
> I installed Fedora Core 4 on a new machine that has an AsRock
> P4VM800 mainboard. Its manual says that the integrated VGA
> controller is an S3G Unichrome Pro 2D/3D device. Wow, xorg must
> surely know this device I thought, but no. It's only usable with
> the vesa driver. :-(
>
> The device's PCI ID is 1106:3344, subdevice ID is also 3344 with
> an AsRock vendor ID but I didn't make note of the numeric value
> of that. I recompiled xorg-x11 in FC4 adding the device ID
> to via_regs.h, via_driver.c. Actually I recompiled it three times
> with three different variation in via_hwdiff.c: first time I didn't
> modify this file, then I tried to get this device handled the same
> as a VT3204 than a VT3205. Neither version worked correctly,
> although all of them recognized my monitor through DDC but I couldn't
> get a stable picture. Hardware cursor appeared in every time but
> the picture ran. 16 and 24 bit colordepth worked the same. I tried
> to tweak the BIOS settings, giving 8, 16 MB to the videocard from the
> main memory but it didn't help. Can someone help me to get this device
> handled with acceleration?
>
> I also came across this page when I searched for a solution:
>
> http://www.viaarena.com/default.aspx?PageID=5&ArticleID=68&P=5
>
> It seems that very few devices are handled by the via driver
> in xorg-x11 at present.
>
> Best regards,
> Zoltán Böszörményi
>

Unless there is something funky about your particular board,
the chipset detection should be adequate.  Otherwise, find another
M/B with the same quirks as your own and override the Chipset
parameter in the Device section.

-Philip