Network issues in 2.6

[Carlos Fernandez Sanz]

I upgraded from 2.4.22 to 2.6.5 (to test HPT374' support, which BTW, works
fine).

However, I'm having serious network issues now. The NIC is a 3com 3c905B.
ifconfig shows this:

eth0      Link encap:Ethernet  HWaddr 00:01:03:27:81:75
          inet addr:192.168.20.1  Bcast:192.168.20.255  Mask:255.255.255.0
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:11241 errors:0 dropped:0 overruns:0 frame:0
          TX packets:9739 errors:0 dropped:0 overruns:0 carrier:9732
          collisions:0 txqueuelen:1000
          RX bytes:2994485 (2.8 Mb)  TX bytes:835146 (815.5 Kb)
          Interrupt:9 Base address:0xd800

Note that for TX packets, the carrier number is almost the same as the total
packets.... booting in 2.4.22, there are zero problems.  The only difference
in the ifconfig, other than that, is that in 2.4.22, I have "RUNNING" in the
options (but I didn't find how to force that).

I read the docs and tried forcing full_duplex, etc, with no success.
BTW, that NIC is connected to a 10/100 switch, nothing fancy.

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