Cannot find wireless networks using Ath9k WiFi cards

Hi all,

I’ve mounted a Wifi card into a Jetson Nano based on Ath9k (AR9642). I’ve installed the drivers properly. The interface is visible (wlan0), however, it cannot find any wireless network. In opposition, the recommended Wifi Card Intel 8265 finds the surrounded wireless networks. How can I configure the AR9642 to show the surrounding wireless networks? Any clue? Thanks in advanced!!

Here part of many tests I’ve tried:

cttc@cttc-desktop:~$ lsmod | grep ath9k
ath9k                 151289  0
ath9k_common           28403  1 ath9k
ath9k_hw              453422  2 ath9k,ath9k_common
ath                    23685  3 ath9k_hw,ath9k,ath9k_common
mac80211              722530  1 ath9k
cfg80211              591474  4 mac80211,ath9k,ath,ath9k_common
cttc@cttc-desktop:~$ cat /etc/modprobe.d/ath9k.conf
cat: /etc/modprobe.d/ath9k.conf: No such file or directory
cttc@cttc-desktop:~$ sudo iwlist scan
[sudo] password for cttc:
dummy0    Interface doesn't support scanning.

l4tbr0    Interface doesn't support scanning.

eth0      Interface doesn't support scanning.

wlan0     No scan results

usb0      Interface doesn't support scanning.

lo        Interface doesn't support scanning.

rndis0    Interface doesn't support scanning.

cttc@cttc-desktop:~$ sudo iwlist wlan0 scan | grep \(Channel
wlan0     Interface doesn't support scanning : Device or resource busy

cttc@cttc-desktop:~$ rfkill unblock all
cttc@cttc-desktop:~$ sudo iwlist scan
dummy0    Interface doesn't support scanning.

l4tbr0    Interface doesn't support scanning.

eth0      Interface doesn't support scanning.

wlan0     No scan results

usb0      Interface doesn't support scanning.

lo        Interface doesn't support scanning.

rndis0    Interface doesn't support scanning.

cttc@cttc-desktop:~$ iw dev
phy#0
Interface wlan0
ifindex 4
wdev 0x1
addr b0:c0:90:b7:e9:67
type managed
txpower 15.00 dBm
cttc@cttc-desktop:~$ sudo ifconfig wlan0 up
cttc@cttc-desktop:~$ sudo iwlist wlan0 scan | grep \(Channel
cttc@cttc-desktop:~$ nmcli d
DEVICE         TYPE      STATE                   CONNECTION        
eth0           ethernet  connected               Wired connection 1
l4tbr0         bridge    connected (externally)  l4tbr0            
wlan0          wifi      disconnected            --                
p2p-dev-wlan0  wifi-p2p  disconnected            --                
dummy0         dummy     unmanaged               --                
rndis0         ethernet  unmanaged               --                
usb0           ethernet  unmanaged               --                
lo             loopback  unmanaged               --                
cttc@cttc-desktop:~$ nmcli r wifi on
cttc@cttc-desktop:~$ nmcli d wifi list
IN-USE  BSSID  SSID  MODE  CHAN  RATE  SIGNAL  BARS  SECURITY

We don’t have a test on AR9642. And would suggest to get proper driver working with Linux 4.9 from vendor if it’s from mass product purpose. Otherwise I would suggest to try the supported wifi modules list in our components list https://developer.nvidia.com/embedded/dlc/jetson-nano-scl.

Thank you @alanz for the information, it was very useful. Unfortunately, none of those wireless cards has ath9 chipset. Hopefully, it will change soon.