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I have an Acer Aspire One AO756-Series, equipped with a wifi controller Atheros Communications Inc. AR9462

Everything worked fine on 12.04, but when I upgraded to 12.10 I experimented some issues :

  • wifi does work!
  • still, the wifi icon/menu does not react normally :
    • it is always grey, hence not indicating if connected or not,
    • It does not react to me clicking on it (disconnect, change the network, desactive wifi, etc)

So it's not a critical issue because I can change the active wifi connection through control pannel, but it is very annoying.

Do you know of an solution around this issue?

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One solution with Acer V3 571G (card AR9462) is to configure the ath9k module with options: nohwcrypt=1

sudo nano /etc/modprobe.d/ath9k.conf

The file should contain this:

options ath9k nohwcrypt=1 blink=1 btcoex_enable=1 enable_diversity=1

After saving this modified file, do

rmmod ath9k
modprobe -b ath9k
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Sometimes, spurious listings get added to /etc/network/interfaces during an upgrade. Network Manager assumes you will therefore be managing those interfaces; in your case, wireless, and not NM. Please check:

gksudo gedit /etc/network/interfaces

If there is anything more in there than this, remove it:

auto lo
iface lo inet loopback

Proofread carefully, save and close gedit. Restart NM:

sudo service network-manager restart

Now your wireless should be correctly managed by NM.

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