PROBLEM: 2.4.19 & 2.4.20 hang without oops...

My motherboard is a Supermicro P6DBE with the 440BX chipset, 2 x P3 (Katmai) at 450MHz, 512MB RAM.
The output of 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)
00:0f.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 08) 00:10.0 SCSI storage controller: Adaptec AHA-2940U2/U2W
00:12.0 PCI bridge: Hint Corp HB1-SE33 PCI-PCI Bridge (rev 13)
00:14.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 08) 01:08.0 USB Controller: NEC Corporation USB (rev 41)
01:08.1 USB Controller: NEC Corporation USB (rev 41)
01:08.2 USB Controller: NEC Corporation USB 2.0 (rev 02)
01:0b.0 FireWire (IEEE 1394): Texas Instruments TSB12LV26 IEEE-1394 Controller (Link) 02:00.0 VGA compatible controller: nVidia Corporation RIVA TNT2 Model 64 (rev 15)

Also two ISA cards:
Adaptec AHA1542C
Digiboard PC/8i

I'd be happy to help track the hang down. If not I'll have to backport the firewire changes in 2.4.19/20 to 2.4.18 since the WD firewire drive is not recognized correctly in 2.4.20.
--- Matthew Costello <[email protected]>