No signal from second video card

Question

I'm resurrecting an ancient machine, putting Arch on it and making it useful again.
The VGA output is flakey, not working at the highest resolution my monitor can support.  And I found an old PCI video card and threw it into the machine, hoping it would be better.  Trouble is, I get no signal at all from the second card.  Nothing sent to the monitor at all.
Running lspci, I see both VGA cards:
00:00.0 Host bridge: Intel Corporation 82845G/GL[Brookdale-G]/GE/PE DRAM Controller/Host-Hub Interface (rev 01)
00:02.0 VGA compatible controller: Intel Corporation 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (rev 01)
00:1d.0 USB controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 01)
00:1d.1 USB controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 01)
00:1d.2 USB controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 01)
00:1d.7 USB controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 81)
00:1f.0 ISA bridge: Intel Corporation 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801DB (ICH4) IDE Controller (rev 01)
00:1f.3 SMBus: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 01)
02:02.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
02:09.0 Multimedia audio controller: Ensoniq 5880B [AudioPCI] (rev 04)
02:0a.0 VGA compatible controller: 3Dfx Interactive, Inc. Voodoo 3 (rev 01)
The Intel Corporation 82845G is the one that partially works (for example I have to specify a resolution on the kernel boot line, otherwise the monitor says "invalid mode").
The Voodoo 3 sends nothing at all to the monitor.  No console when booting up.  I haven't found any errors in the log.  Since lspci finds the card, what else do I need to do to make it work?
Thanks for any help.  -Dave

Answer 1

Still having no luck with the video card.  But some additional info...
When I run, lspci -v, I don't see "Kernel driver in use" (which I do see for my first graphics card and most of the other devices listed).
02:0a.0 VGA compatible controller: 3Dfx Interactive, Inc. Voodoo 3 (rev 01) (prog-if 00 [VGA controller])
Subsystem: 3Dfx Interactive, Inc. Voodoo3 3000 PCI
Flags: fast devsel, IRQ 22
Memory at e2000000 (32-bit, non-prefetchable) [size=32M]
Memory at f8000000 (32-bit, prefetchable) [size=32M]
I/O ports at 2800 [size=256]
[virtual] Expansion ROM at e0110000 [disabled] [size=64K]
Capabilities: <access denied>
However, I am loading the tdfx driver.  I see these lines in dmesg...
[ 4.708446] pci 0000:02:0a.0: enabling device (0000 -> 0003)
[ 4.708487] pci 0000:02:0a.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22
[ 4.708499] pci 0000:02:0a.0: setting latency timer to 64
[ 4.708823] [drm] Initialized tdfx 1.0.0 20010216 for 0000:02:0a.0 on minor 0
Not sure how to troubleshoot this any further.