Re: Ethernet card not detected!
I meant maybe the *ethernet card* is broken. The kernel isn't even trying to load the driver; maybe the card is broken, maybe there's an IRQ conflict or something (fiddle with the BIOS to solve that) OR maybe the kernel just doesn't have driver.
What kernel are you running anyway (output of 'uname -a' welcome), which module packages are installed? Could you try manually inserting the driver with "sudo modprobe rtl8139" ?
EDIT: After doing the modprobe, please post the last bunch of lines from 'dmesg' again (not the whole thing again, please)
Ubuntu 8.10 on every machine - and some Windows too (I actually like Vista)