Tell us which kernel version you use ( 2.4. or 2.6 ) and provide the output of ( lspci ; lspci -n ) | grep -e Ethernet -e 0200 | sort to this bugreport
Linux kernel: 2.6.12.5 eris:/home/stefan# ( lspci ; lspci -n ) | grep -e Ethernet -e 0200 | sort 0000:02:09.0 0200: 1282:9102 (rev 31)0000:02:09.0 Ethernet controller: Davicom Semiconductor, Inc. 21x4x DEC-Tulip compatible 10/100 Ethernet (rev 31)
That's already after booting with dmfe in /etc/modules if that makes any difference.
Stefan