I have bee doing some homework and see that a number of Linux distributions have problems with the DEC 21041 chip set. It seems that the tulip driver needs to be loaded, but it may be version specific. Knoppix 5.1 finds the card, but can't configure it so that it will actually work. See below.
Booted with this string:
knoppix acpi=off noapic nolapic pnpbios=off pci=bios
knoppix@Knoppix:~$ ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:C0:F0:23:9F:AC
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:5 errors:0 dropped:0 overruns:0 frame:0
TX packets:3 errors:0 dropped:55 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1820 (1.7 KiB) TX bytes:1522 (1.4 KiB)
Interrupt:11 Base address:0x2c00
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:29 errors:0 dropped:0 overruns:0 frame:0
TX packets:29 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2209 (2.1 KiB) TX bytes:2209 (2.1 KiB)
I did a lsmod and see that the tulip driver is there, but zero use. What is the best way to get this card (Kingston KNE40BT) to work, or just get two new cards?
Thanks,
Dave

OEM Genuine 86WH 69KF2 Battery For Dell XPS 15 9500 Precision 5550 M59JH M15 M17
$45.49
OEM 68Wh 3HWPP Battery For Dell Latitude 5401 5501 5410 5510 E5411 E5511
$28.99
Genuine OEM 63Wh 7FMXV Battery For Dell Latitude 5320 7320 7420 7520 4M1JN TN2GY
$32.99
OEM Genuine 95WH PKWVM C903V Battery 7550 For Dell Precision CR72X 17C06 447VR
$37.40
OEM Genuine 42Wh WDX0R For DELL Inspiron WDXOR Battery 15 5567 5568 13 5368 7368
$22.99
OEM 68Wh 3HWPP Battery For Dell Latitude 5401 5411 15 5501 5511 Precision 3541
$35.78
Lot of 5 Dell OEM 65W 7.4mm 19.5V 3.34A AC Adapters Mixed Models B Grade
$39.99
OEM 74WH 357F9 Battery For Dell Inspiron 15 7559 i7559 7557 i7557 5577 7567 5576
$26.99
OEM 97Wh NYFJH Battery For Dell Precision 7530 7540 7730 7740 P74F P34E Series
$30.99
Genuine OEM 52Wh DXGH8 Battery For Dell XPS 13 9370 9380 7390 Series H754V NEW
$32.99