Tyan Tiger MPX (S2466N-4M), 3com 3c966B-T and FC4

[David G. Miller]

Trying to get the subject combination to work.  The driver keeps failing 
to load with the following error as reported by dmesg:

tg3.c:v3.59 (June 8, 2006)
ACPI: PCI Interrupt 0000:00:09.0[A] -> GSI 21 (level, low) -> IRQ 193
tg3_test_dma() buffer corrupted on read back! (262177 != 1)
tg3: DMA engine test failed, aborting.

lspci -v shows this NIC as:

00:09.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5701 
Gigabit Ethernet (rev 15)
      Subsystem: 3Com Corporation 3C996B-T 1000Base-T
      Flags: 66Mhz, medium devsel, IRQ 193
      Memory at f0000000 (64-bit, non-prefetchable) [size=64K]
      [virtual] Expansion ROM at 88100000 [disabled] [size=64K]
      Capabilities: [40] PCI-X non-bridge device.
      Capabilities: [48] Power Management version 2
      Capabilities: [50] Vital Product Data
      Capabilities: [58] Message Signalled Interrupts: 64bit+ Queue=0/3 
Enable-

I just bought the 3C996B-T in an attempt to deal with a slow transmits 
with a 3com 3C2000-T in this same box.  Some Google searches indicate 
quite a bit of discussion concerning a similar issue in 2003 but nothing 
that provided either definitive resolution or a fix.  The closest was a 
suggestion to disable the "memory hole" in the BIOS (was not initially 
enabled) so I tried the other possible settings but with no improvement.

One Google hit I found was a series of performance benchmarks that 
included this same combination of NIC and motherboard but it was fairly 
old based on the benchmark only including Windows 2000 and not Windows 
XP.  This would seem to indicate that it was possible to get the subject 
combination to work at one time.  Any help or suggestions would be 
greatly appreciated.

Thanks,
Dave

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