Public bug reported:

wifi wi-fi wireless connection drops down flowing to kern.log:

Sep 26 19:27:13 freelsd-luck kernel: [28423.068865] ath: phy0: DMA failed to 
stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
Sep 26 19:27:13 freelsd-luck kernel: [28423.182073] ath: phy0: Chip reset failed
Sep 26 19:27:13 freelsd-luck kernel: [28423.182085] ath: phy0: Unable to reset 
channel, reset status -22
Sep 26 19:27:13 freelsd-luck kernel: [28423.258006] ath: phy0: DMA failed to 
stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
Sep 26 19:27:13 freelsd-luck kernel: [28423.371691] ath: phy0: Chip reset failed
Sep 26 19:27:13 freelsd-luck kernel: [28423.371702] ath: phy0: Unable to reset 
channel, reset status -22
Sep 26 19:27:14 freelsd-luck kernel: [28423.447861] ath: phy0: DMA failed to 
stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
Sep 26 19:27:14 freelsd-luck kernel: [28423.560914] ath: phy0: Chip reset failed
Sep 26 19:27:14 freelsd-luck kernel: [28423.560926] ath: phy0: Unable to reset 
channel, reset status -22
Sep 26 19:27:14 freelsd-luck kernel: [28423.636926] ath: phy0: DMA failed to 
stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff

Would be easier to have a opportunity to reset connection through logging out 
from DE.
I do appreciate any clarifications!

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ibus 1.5.11-1ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
Uname: Linux 4.4.0-38-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Sep 30 23:27:14 2016
ExecutablePath: /usr/bin/ibus-daemon
InstallationDate: Installed on 2016-08-30 (31 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
ProcEnviron:
 LANGUAGE=ru
 PATH=(custom, user)
 XDG_RUNTIME_DIR=<set>
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: ibus
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: ibus (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1629469

Title:
  wifi wi-fi wireless connection drops down randomly

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