Note that there are other posts about the RealTek 8139 not working, not just this one.
Has anyone gotten a RealTek 8139 ethernet working with Knoppix 3.3?
I get:
# insmod 8139too
Using /lib/modules/2.4.24-xfs/kernel/drivers/net/8139too.o
...unresolved symbol crc32_le
unresolved symbol bitreverse
And, of course, it does not work. How hard is it to recompile the Knoppix kernel? Any idea what symbols the RealTek ethernet card is looking for?
Note that there are other posts about the RealTek 8139 not working, not just this one.

Lenovo ThinkPad L13 Yoga Touch Laptop 13.3β Core i5 8GB RAM 256GB SSD Win 11 Pro
$239.99
Lenovo ThinkPad L15 Gen 3 15.6" 16GB, Thunder Black
$241.50
Lenovo ThinkPad E14 Gen 2 Laptop 14β HD Ryzen 5 16GB RAM 512GB SSD Win 11 Pro
$319.99
Lenovo ThinkPad L15 Gen 3 15.6" 16GB, Thunder Black
$241.50
Lenovo ThinkPad T14 Gen 1 14" AMD Ryzen 5 16GB 256GB SSD
$219.99
Lenovo Thinkpad T14 Gen 2i 14" 16GB 512GB, Black
$313.00
Lenovo ThinkPad E14 Gen 3 Laptop 14β FHD AMD Ryzen 5 16GB RAM 512GB SSD Win 11
$374.99
Lenovo Thinkpad T14 Gen 2 14" 16GB, Thunder Black
$387.46
Lenovo IdeaPad 1 15AMN7 15.6" 8GB 512GB, ABYSS BLUE
$190.99
Lenovo ThinkPad T495 14β Laptop AMD Ryzen 5 PRO 16GB RAM 256GB SSD Windows 11
$229.99