Qualcomm Atheros QCA6174 802.11ac - drops out for a few seconds frequently

Bug #1663971 reported by leee
14
This bug affects 3 people
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Confirmed
Medium
Unassigned

Bug Description

Presumably this is because of firmware?

[ 104.489195] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/cal-pci-0000:02:00.0.bin failed with error -2
[ 104.490292] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/QCA6174/hw3.0/firmware-5.bin failed with error -2
[ 104.490297] ath10k_pci 0000:02:00.0: could not fetch firmware file 'ath10k/QCA6174/hw3.0/firmware-5.bin': -2

------------------------------------------------------------------------

Machine: Dell XPS 15 (9560) - released 2017 January
Install: disk completely erased
         Ubuntu 16.04.1 installed over wireless with:
           - download updates while installing ubuntu
           - install third-party hardware
           - full disk crypto+luks
         Note 1: Installation process did not realize there exists a GTX 1050
                 so we are solely using Intel integrated graphics.
         Note 2: Installation done not on Dell TB16 Dock to isolate wireless
                 problems alone first.
First Boot: update/upgrade/dist-upgrade'd after first boot and rebooted

------------------------------------------------------------------------

If there is additional information we can provide please let us know!

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-62-generic 4.4.0-62.83
ProcVersionSignature: Ubuntu 4.4.0-62.83-generic 4.4.40
Uname: Linux 4.4.0-62-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: leee 1760 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Feb 12 02:44:22 2017
HibernationDevice: RESUME=UUID=54594d9c-c63b-4990-8336-2d68892236a7
InstallationDate: Installed on 2017-02-12 (0 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 04f3:24a1 Elan Microelectronics Corp.
 Bus 001 Device 002: ID 0cf3:e301 Atheros Communications, Inc.
 Bus 001 Device 004: ID 0c45:6713 Microdia
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. XPS 15 9560
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-62-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-62-generic N/A
 linux-backports-modules-4.4.0-62-generic N/A
 linux-firmware 1.157.8
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/09/2017
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.0.3
dmi.board.name: 05FFDN
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.0.3:bd01/09/2017:svnDellInc.:pnXPS159560:pvr:rvnDellInc.:rn05FFDN:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.name: XPS 15 9560
dmi.sys.vendor: Dell Inc.

Revision history for this message
leee (leee) wrote :
Revision history for this message
Brad Figg (brad-figg) wrote : Status changed to Confirmed

This change was made by a bot.

Changed in linux (Ubuntu):
status: New → Confirmed
Revision history for this message
Joseph Salisbury (jsalisbury) wrote :

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.10 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.10-rc8

Changed in linux (Ubuntu):
importance: Undecided → Medium
status: Confirmed → Incomplete
Revision history for this message
leee (leee) wrote :

I have submitted this bug on 4.4 as recommended by a colleague, but the issue continued to persist in 4.9 and 4.10 in the same manner and dmesg emitted the same messages I point out here.

Revision history for this message
leee (leee) wrote :

An update on this bug - since moving to Ubuntu 16.04.2 (which ships with 4.8), I can no longer seem to reproduce any wireless network downages. This also applies to 4.10.

What I can't seem to understand, though, is why the kernel keeps wanting a file named `ath10k/QCA6174/hw3.0/firmware-5.bin` - if it can't find this file, then how am I no longer having network issues?

Changed in linux (Ubuntu):
status: Incomplete → Confirmed
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