Kernel 3.13.0-139 kills my sound

[Nic Knox]

:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: M5461 [HDA ULI M5461], device 0: ALC880 Analog [ALC880 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: M5461 [HDA ULI M5461], device 1: ALC880 Digital [ALC880 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

I suspect this will afflict many but I can be contacted via <email address hidden> for more in ifo if wanted

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-139-generic 3.13.0-139.188
ProcVersionSignature: Ubuntu 3.13.0-139.188-generic 3.13.11-ckt39
Uname: Linux 3.13.0-139-generic i686
ApportVersion: 2.14.1-0ubuntu3.27
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: nicnoks 1991 F.... pulseaudio
CurrentDesktop: Unity
Date: Mon Jan 15 11:25:03 2018
HibernationDevice: RESUME=UUID=fbf75b25-b50e-4e8d-b567-6ce2288f237d
MachineType: MSI MS-7194
ProcFB: 0 nouveaufb
ProcKernelCmdLine: root=UUID=d2f25be6-7533-497a-bb43-d68c18517978 ro quiet splash
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-139-generic N/A
 linux-backports-modules-3.13.0-139-generic N/A
 linux-firmware 1.127.24
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-08-13 (1250 days ago)
WpaSupplicantLog:

dmi.bios.date: 01/05/2006
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 080012
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: MS-7194
dmi.board.vendor: MSI
dmi.board.version: 1A
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr080012:bd01/05/2006:svnMSI:pnMS-7194:pvr1A:rvnMSI:rnMS-7194:rvr1A:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: MS-7194
dmi.product.version: 1A
dmi.sys.vendor: MSI

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Nic Knox (baknox)]

This bug is not specific to Kernel 3.13.0-139: it is present on at least 3.13.0-143 as well. For completeness hardware still as of today:
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: M5461 [HDA ULI M5461], device 0: ALC880 Analog [ALC880 Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: M5461 [HDA ULI M5461], device 1: ALC880 Digital [ALC880 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

[Nic Knox (baknox)]

Further research seems to suggest that the bug forces a reset of Sound Settings to: 'Play Sound Through - Dummy Output' which I am unable to reset as there are no other output options offered.

[Nic Knox (baknox)]

Took kernel 3.13.0-144 9/4/18. PC booted every day. No other settings altered. Sound suddenly back when boot pm 12/4/18.

[Nic Knox (baknox)]

Sound lasted for approx 2 hours [pm 12/4/18] then ceased. PC running throughout: no settings altered, no programming changes.