Comment 13 for bug 117861

I have a similar problem, but in this case, the system is Ubuntu 8.04 (The Kernel is 2.6.24.16.18 and I have installed the linux-restricted-modules-2.6.24-16-generic, including the packages "linux-restricted-modules-generic" and "linux-restricted-modules-common")

Problem: When I'm trying to configure my connection (In ath0) via the Network Monitor Applet (This happens when I click the button "configure"), I receive the following message box:

(Warning Symbol) The Interface does not exist.
Check that it is correctly typed and that it is correctly supported by your system

But, in an impossible and strange case, ifconfig confirms that I HAVE THE CORRECT INTERFACE:
ath0 Link encap:Ethernet HWaddr 00:20:e0:1a:2a:ad
          inet addr:148.206.75.7 Bcast:148.206.75.255 Mask:255.255.255.0
          inet6 addr: fe80::220:e0ff:fe1a:2aad/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:1372 errors:0 dropped:0 overruns:0 frame:0
          TX packets:53 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:148105 (144.6 KB) TX bytes:5816 (5.6 KB)

This is the info from lspci -vv about AR5212:

05:04.0 Ethernet controller: Atheros Communications Inc. AR5212/AR5213 Multiprotocol MAC/baseband processor (rev 01)
 Subsystem: Actiontec Electronics Inc Unknown device 1042
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
 Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
 Latency: 168 (2500ns min, 7000ns max), Cache Line Size: 64 bytes
 Interrupt: pin A routed to IRQ 22
 Region 0: Memory at f0500000 (32-bit, non-prefetchable) [size=64K]
 Capabilities: [44] Power Management version 2
  Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
  Status: D0 PME-Enable- DSel=0 DScale=2 PME-

In other words, I'm online, but I can't download the packages from Synaptic and, obviously, I can't navigate with Firefox. I'm including the report of Hardware Testing for best info. Can someone confirm this? Thanks! (and sorry for my bad english)