Exact same problem here on Asus laptop UL50Ag-A2 with AR8131/8132 NIC, trying 10.04-alternate iso pxe network install.
I tried compiling the AR81 Family linux drivers 1.0.1.9 from Atheros (see http://bugs.launchpad.net/ubuntu/+source/linux-ubuntu-modules-2.6.24/+bug/341183) and putting them on a removable USB drive. But when the graphical net installer looks on the USB drive, either the drivers either didn't compile properly or the installer just doesn't see them.
Exact same problem here on Asus laptop UL50Ag-A2 with AR8131/8132 NIC, trying 10.04-alternate iso pxe network install.
I tried compiling the AR81 Family linux drivers 1.0.1.9 from Atheros (see http:// bugs.launchpad. net/ubuntu/ +source/ linux-ubuntu- modules- 2.6.24/ +bug/341183) and putting them on a removable USB drive. But when the graphical net installer looks on the USB drive, either the drivers either didn't compile properly or the installer just doesn't see them.