Public bug reported:

This is the exact same bug described in Bug #407040 and Bug #404433, I
need to reopen this as it was never fixed. I look as though network card
is not able to reset and is causing random disconnects and causing the
wlan interface to become unavailable, to a point where I need to restart
my netbook to get access to the interface again. DMESG output:

[  400.285672] ath: phy0: Chip reset failed
[  400.285688] ath: phy0: Unable to reset channel, reset status -22
[  400.285771] ath: phy0: Unable to set channel
[  400.288009] ath: phy0: RX failed to go idle in 10 ms RXSM=0xffffffff
[  400.288009] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff 
AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff


I am running:
Linux albert-1001PXD 4.4.0-38-generic #57-Ubuntu SMP Tue Sep 6 15:41:41 UTC 
2016 i686 i686 i686 GNU/Linux


The previous bug reports expired and I haven't found a fix online.

** Affects: ubuntu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1631803

Title:
   ath9k driver randomly disconnects and can only reconnect by reloading
  the module

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