*** This bug is a duplicate of bug 1743279 ***
    https://bugs.launchpad.net/bugs/1743279
Public bug reported:

 Ubuntu release
================

Description:    Ubuntu 16.04.3 LTS
Release:        16.04

 Package versions
==================

linux-firmware:
  Installed: 1.157.14
  Candidate: 1.157.14
  Version table:
 *** 1.157.14 500
        500 http://mirror.atlantic.net/ubuntu xenial-updates/main amd64 Packages
        500 http://mirror.atlantic.net/ubuntu xenial-updates/main i386 Packages
        500 http://mirror.atlantic.net/ubuntu xenial-security/main amd64 
Packages
        500 http://mirror.atlantic.net/ubuntu xenial-security/main i386 Packages
        100 /var/lib/dpkg/status
     1.157 500
        500 http://mirror.atlantic.net/ubuntu xenial/main amd64 Packages
        500 http://mirror.atlantic.net/ubuntu xenial/main i386 Packages

linux-image-generic-hwe-16.04:
  Installed: 4.13.0.26.46
  Candidate: 4.13.0.26.46
  Version table:
 *** 4.13.0.26.46 500
        500 http://mirror.atlantic.net/ubuntu xenial-updates/main amd64 Packages
        500 http://mirror.atlantic.net/ubuntu xenial-security/main amd64 
Packages
        100 /var/lib/dpkg/status

 What I expected to happen
===========================

WiFi card (QCA6174 802.11ac Wireless Network Adapter) works properly, as
it did with kernel series 4.10.

 What happened instead
=======================

Since upgrade to 4.13 series, WiFi card loses connection to access point
(can't even ping access point) while Ubuntu still believes it's properly
connected. It needs to be disconnected and reconnected to access point
to regain a real connection.

 Solution
==========

>From https://askubuntu.com/a/978143/616451:

The solution is simple: install updated firmware from firmware
repository provided by Qualcomm.

Detailed steps:

1. Download https://github.com/kvalo/ath10k-
firmware/blob/master/QCA6174/hw3.0/board-2.bin and overwrite
/lib/firmware/ath10k/QCA6174/hw3.0/board-2.bin with the downloaded file.

2. Download https://github.com/kvalo/ath10k-
firmware/blob/master/QCA6174/hw3.0/4.4.1/firmware-6.bin_WLAN.RM.4.4.1-00065-QCARMSWP-1
and overwrite /lib/firmware/ath10k/QCA6174/hw3.0/firmware-6.bin.

3. Restart

 Related bug report
====================

Also from https://askubuntu.com/a/978143/616451:

I had the same issue and found a Debian bug report that also has a
solution. See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=879184

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-firmware 1.157.14 [modified: 
lib/firmware/ath10k/QCA6174/hw3.0/board-2.bin 
lib/firmware/ath10k/QCA6174/hw3.0/board.bin 
lib/firmware/ath10k/QCA6174/hw3.0/firmware-6.bin]
ProcVersionSignature: Ubuntu 4.13.0-26.29~16.04.2-generic 4.13.13
Uname: Linux 4.13.0-26-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Jan 15 14:32:58 2018
Dependencies:
 
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-xenial-amd64-20160624-2
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-11-01 (440 days ago)
InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 
20160624-10:47
JournalErrors:
 Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] 
failed with exit code 1: Hint: You are currently not seeing messages from other 
users and the system.
       Users in the 'systemd-journal' group can see all messages. Pass -q to
       turn off this notice.
 No journal files were opened due to insufficient permissions.
PackageArchitecture: all
SourcePackage: linux-firmware
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux-firmware (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

** This bug has been marked a duplicate of bug 1743279
   QCA6174 stops working on newer kernels after second group rekeying

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https://bugs.launchpad.net/bugs/1743446

Title:
  Kernel 4.13.0-26-generic requires updated QCA6174 firmware

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