dual-head

[Justin Georgeson]

Justin Georgeson wrote:
> I think it's something in my BIOS. Along with the TNT2 I obtained a PCI 
> Matrox Millennium II. With the AGP TNT2 inserted, kudzu did not notice 
> the addition of the Matrox card or the removal of the Voodoo 2 card. 
> After removing the AGP TNT2 card, however, both changes were noticed by 
> kudzu. The discrepancy comes from the fact that lspci lists all cards 
> properly, but kudzu and X don't see the PCI cards when an AGP card is 
> inserted.
> 
> I'm now trying to get dual-head configured with the Matrox and Voodoo 
> cards.
> 
> Justin Georgeson wrote:
> 
>> I have a fully updated Fedora Core 1 installation, with the 
>> 2.4.22-1.2174.nptlsmp kernel. I've been using a PCI Voodoo2 with the 
>> tdfx driver for a long time with no problems. I recently installed an 
>> AGP Riva TNT2 and loaded the nvidia proprietary driver and nvidia-glx 
>> from the livna.org repository. The TNT2 card works quite nicely. But X 
>> no longer sees the Voodoo2 card, so I can't get dual-head up and 
>> running. I tried installing Alan Cox's Voodoo driver from the 
>> fedora-test-list list, but it had the same result. The X log says this
>>
>> (WW) TDFX: No matching Device section for instance (BusID PCI:0:11:0) 
>> found
>>
>> And lspci confirms that this is the right ID
>>
>> 00:0b.0 VGA compatible controller: 3Dfx Interactive, Inc. Voodoo 3 
>> (rev 01)
>>
>> Is dual-head supported limited to combinations of PCI cards under Linux?
>>
>>
> 

OK. The Matrox wouldn't go for dual-head either. I'm starting to lean 
strongly towards BIOS, except it works in Windows on this same machine 
(dual-boot). Although I've seen plenty of cases where Windows totally 
ignored the BIOS for both suspend/hibernate in laptops and for graphics 
drivers on chipsets which use the system memory for video memory and the 
BIOS has no option to set the amount of "stolen" memory. So I guess this 
  is another case where the Windows drivers override the limitations in 
the BIOS. One correction. I've determined that my Voodoo card is a 
Voodoo 3 2000, not a Voodoo 2. And at some point the fixed font became 
no longer servable via xfs. Starting X without a FontPath line for 
/usr/X11R6/lib/X11/fonts/misc results in X not starting, with the error 
that it couldn't find the fixed font.

Anyhow I have the TNT2 and Voodoo 3 cards installed, and Linux is 
configured for single-head using the TNT2. If anyone has any ideas how 
to get around the apparent BIOS problem (this is a Tyan S1696DLU Thunder 
2 ATX motherboard) feel free to chime in.