I had the same problem under 12.10 where my Atheros AR8161 wouldn't even show up under the network options. The device does show up in 13.04 as the name "Wired connection 1" When I try to connect to this device, though, it just times out. Under 12.10, I installed the compact-wireless alx driver and everything was fixed. But I am unable to install it in 13.04. Here are a few console outputs for you--if you need more information, please ask--thank you.
brett@brett-pc:~$ lspci | grep Ethernet 03:00.0 Ethernet controller: Qualcomm Atheros AR8161 Gigabit Ethernet (rev 08)
brett@brett-pc:~$ ifconfig eth0 Link encap:Ethernet HWaddr c8:60:00:9a:11:0e inet6 addr: fe80::ca60:ff:fe9a:110e/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:148 errors:0 dropped:0 overruns:0 frame:0 TX packets:177 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:13354 (13.3 KB) TX bytes:38207 (38.2 KB) Interrupt:16 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:7073 errors:0 dropped:0 overruns:0 frame:0 TX packets:7073 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:582967 (582.9 KB) TX bytes:582967 (582.9 KB)
Edit: Here's the link to my last thread when I was having troubles with 12.10. Maybe this'll spark some interest in this thread."