Wireless:
The wire-less works out of the box. You only need to configure your security (WEP / WPA)
Wired:
Aspire 8920 uses an Attansic Technology Corp Atheros
 AR8121 / AR8113 PCI-E card. Unfortunatley that hasn't been included in 
the current kernels. Therefore you need to do this manually. The 
following forum has a good description (http://ubuntuforums.org/showthread.php?t=770173) In short here: 
- Install build-essential (synaptic, aptitude or apt-get)
 - download the linux driver from: http://support.asus.com/download/dow...model=P5KPL-CM or : http://www.bas-r.nl/atheros_lan_driver/ (this has the latest, needed for 2.6.24-24-generic)
 - Unpack in your Home directory ex. /home/user//LinuxDrivers/L1e_Lan/l1e-l2e-linux-v1.0.0.4/src
 - in this directory run: sudo KBUILD_NOPEDANTIC=1 make sudo KBUILD_NOPEDANTIC=1 make install
 - This will install driver in /lib/modules/2.6.24-22-generic/kernel/drivers/net/atl1e/at1le.ko
 - in this directory run: sudo insmod ./atl1e.ko