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I have installed the 11.10 and everything went smoothly. The wifi card was automatically detected and connected to my wifi network, downloaded all the required files.

But after the restart, I can't use any wireless connections (only the cable), as it says that the device is not supported (or handled).

How can I fix this problem?

user@laptop ~ $ lspci | grep Network
03:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter   (PCI-Express) (rev 01)

user@laptop ~ $ uname -r

user@laptop ~ $ rfkill list
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no

user@laptop ~ $ iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:off/any  
      Mode:Managed  Access Point: Not-Associated   Tx-Power=14 dBm   
      Retry  long limit:7   RTS thr:off   Fragment thr:off
      Power Management:off

user@laptop ~ $ sudo lsmod |grep ath
ath9k                 127538  0 
mac80211              462092  1 ath9k
ath9k_common           13839  1 ath9k
ath9k_hw              312914  2 ath9k,ath9k_common
ath                    24067  2 ath9k,ath9k_hw
cfg80211              199630  3 ath9k,mac80211,ath


 In the network manager I don't see any wireless networks and the Wireless network option is grayed out.

I have installed wicd-daemon. It shows all the available wifi networks and the connection works fine.

But how can I make it to work with the Network Manager? It's tray notifications are pretty convenient.

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Well, the kernel module is loading...which is good. Where isn't it recognizing? NM? wicd? More info required. – RobotHumans Jan 29 '12 at 22:48
@aking1012 See my edit. – takeshin Jan 30 '12 at 8:18
It looks like this is relevant: It's not a solution, but the gist of it is wicd and nm talk to the kernel differently recently. – RobotHumans Jan 30 '12 at 9:08
Here's another link on ubuntuforums: ... seems like a problem with the driver – RobotHumans Jan 30 '12 at 9:13
up vote 0 down vote accepted

You should blacklist the acer_wmi kernel module as explained in this answer here. There is already a bug report for this problem for the kernel here.

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