nV News Forums - Problems with GeForce3 on Opteron-based machine

First, the hardware and software details:

CPU: 2x AMD Opteron 240
Mobo: Accelertech Typhoon64 (aka. Arima/Rioworks HDAMB)
Mobo BIOS: 0.93
RAM: 2 GB PC2100 ECC REG
Video card: Gainward GeForce3
Other cards: SB Audigy, Leadtek Winfast TV2000 XP Deluxe

OS: SuSE 8.2 Pro Beta 9 for x86-64
Kernel: 2.4.23-pre1

The problem is that, when I'm using an updated kernel, I can't get X to start using the Nvidia-provided driver. It works just fine with the Xfree86-provided "nv" driver. The "nvidia" driver seems to work with the distro-provided 2.4.19 kernel, but not with any kernel I've built. I have tried 2.4.22 and 2.4.23-pre1.

The terminal error message X gives is "(EE) NVIDIA(0): Failed to allocate frame buffer context DMA". I'll attach /var/log/XFree86.0.log, /etc/X11/XF86Config and dmesg in case they may be of use.