HP Compaq 6200 Pro MT desktop machine. I installed Ubuntu 10.04.3 LTS server edition. The installer said that it could not detect the network hardware, despite an ethernet cable being plugged in and a link light showing; I tested the cable/connection/node on another machine and it works. I completed the installation, but Ubuntu does not detect the ethernet card.
lspci shows the card, but reports
<access denied> for some of the specifications.
I booted off a CrunchBang Linux (Debian-based) live USB and it detects the network card and I get an IP address.
Rebooted into Ubuntu server -- no network connectivity on the ethernet card.
Update: Installed Debian 6.0.3 (CD1) from USB. It detected the network card during installation and configured the network. I rebooted into Debian and network was working; the machine has an IP address.