On Ubuntu 9.04 Jaunty Jackalope Ethernet LAN card on Acer Aspire 1410 (aka 1810T) is recognized, but does not work out of the box. To get it to work you have to install the driver from Atheros as suggested by Homay over at Kubuntu forums
Step 1. Make sure you have the correct LAN card.
lspci -nn | grep Ethernet
Windows reports this card as Atheros AR8131 PCI-E Gigabit
01:00.0 Ethernet controller : Attansic Technology Corp. Device [1969:1063] (rev c0)
Step 2. Download the driver sources.
Go over to the Atheros driver page and download AR81Family-linux-v184.108.40.206.tar.gz
Step 3. Unpack the driver.
cd to where you saved the driver file and type:
The unpacking process may produce some errors/warnings - simply ignore them.
tar -zxf AR81Family-linux-v220.127.116.11.tar.gz
Step 4. Compile and install
That is it. Now you can either reboot the machine or type:
sudo make install
and you LAN card should work!
sudo modprobe atl1e
In case you get stuck there is a README file included with the driver.