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[Nils Sabelstrom <nilssab@xxxxxxxxx>]

Was this bug ever moved to a ubuntu bug as Christopher M suggested?
I have the same (or at least similar) problem on a Acer V5-171 with Atheros AR9462. 
I didn't know what the best practice was so I made a new bug reported and made it a duplicate for the time being.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1324353

Using 14.04 TT
workarounds that didn't work for me:
disable ipv6
add options to ath9k and reboot: nohwcrypt=1 blink=1 enable_diversity=1  btcoex_enable=1 (added one by one)

I read about changing power options to  FULL, which I didn't manage to figure out how to do in 14.04
Problems were existent in Ubuntu 13.04 as well.

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https://bugs.launchpad.net/bugs/1040943

Title:
  Wireless -very- frequent disconnects in LinuxMint13 - Atheros AR9462

Status in The Linux Mint Distribution:
  New
Status in “linux” package in Ubuntu:
  Invalid
Status in Debian GNU/Linux:
  New

Bug description:
  Wireless Connection disconnects very frequently, almost about every 15 minutes.
  In some cases (more often) the network manager indicate tha i am connected, in other cases clearly disconnects and occasionaly cannot connect (like i have disabled the wireless) an i restart the hardware (wireless card button) to start again.

  My system is Aspire One 765 with Linux Mint 13 kde.
  My wireless card is Atheros AR9462.

  - Atheros Communications Inc. AR9462 Wireless Network Adapter (rev 01)
  -iwconfig:
  wlan0     IEEE 802.11abgn  ESSID:"**********"  
            Mode:Managed  Frequency:2.437 GHz  Access Point: ************* 
            Bit Rate=54 Mb/s   Tx-Power=19 dBm   
            Retry  long limit:7   RTS thr:off   Fragment thr:off
            Power Management:on
            Link Quality=57/70  Signal level=-53 dBm  
            Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
            Tx excessive retries:20152  Invalid misc:4984   Missed beacon:0

  -inxi -N:
  Atheros AR9462 Wireless Network Adapter driver: ath9k

  I've tried as been sugested by some forum threads to run the nohwcrypt option:
  sudo modprobe -v ath9k nohwcrypt=1
  and to make a file in /etc/modprobe.d/ath9k.conf with "options ath9k nohwcrypt" 
  but... nothing.

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