Ok, google.com/linux didn't give me an answer, and I'm at a loss for what to do next.

I'm running slackware-current on a dual-celeron, Abit BP-6. It boots up great with 2.6.5. Here is output from lspci:
root@muse:~# lspci
00:00.0 Host bridge: Intel Corp. 440BX/ZX/DX - 82443BX/ZX/DX Host bridge (rev 03)
00:01.0 PCI bridge: Intel Corp. 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge (rev 03)
00:07.0 ISA bridge: Intel Corp. 82371AB/EB/MB PIIX4 ISA (rev 02)
00:07.1 IDE interface: Intel Corp. 82371AB/EB/MB PIIX4 IDE (rev 01)
00:07.2 USB Controller: Intel Corp. 82371AB/EB/MB PIIX4 USB (rev 01)
00:07.3 Bridge: Intel Corp. 82371AB/EB/MB PIIX4 ACPI (rev 02)
00:0b.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 08)
00:0b.1 Input device controller: Creative Labs SB Live! MIDI/Game Port (rev 08)
00:0d.0 Ethernet controller: Intel Corp. 82540EM Gigabit Ethernet Controller (rev 02)
00:0f.0 Multimedia video controller: Internext Compression Inc iTVC16 (CX23416) MPEG-2 Encoder (rev 01)
00:13.0 Unknown mass storage controller: Triones Technologies, Inc. HPT366/368/370/370A/372 (rev 01)
00:13.1 Unknown mass storage controller: Triones Technologies, Inc. HPT366/368/370/370A/372 (rev 01)
01:00.0 VGA compatible controller: nVidia Corporation NV17 [GeForce4 MX 440-SE] (rev a3)
root@muse:~#

It is the Multimedia video controller that is the problem. It is a Hauppauge WinTV PVR 250 Model 980 (which is supposed to work in Linux with the bttv driver). However, here the snippit from dmesg that highlights the problem:
Linux video capture interface: v1.00
bttv: driver version 0.9.12 loaded
bttv: using 8 buffers with 2080k (520 pages) each for capture
bttv: Host bridge needs ETBF enabled.

What is ETBF? I've look in the BIOS and can't find anything, I've looked through the kernel code, but I didn't see anything too helpfull (I think that the pci_pci_problems function in drivers/pci/quirks.c is flagging the drivers/media/video/bttv-cards.c for the error, but that's all I can find). Anyone have any ideas?