Public bug reported:

1. This bug happens everytime my computer wake up from sleep: a loud crackling 
noise can be heard from headphones but not from laptop speakers
2. It disappears after reboot and audio works perfectly both through laptop 
speakers and headphones
3. Bringing the output volume to 0 doesn't make the crackling sound disappear
4. Bringing microphone volume to 0 doesn't make the crackling sound disappear
5. This bug was not present in the previous version of Ubuntu used on this 
computer ie. 17.04.

Additionnaly, headphones contain a built-in microphone.

```lsb_release -rd
Description:    Ubuntu 17.10
Release:        17.10
```

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.13.0-17.20-generic 4.13.8
Uname: Linux 4.13.0-17-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.7-0ubuntu3.5
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/pcmC0D0p:   etienne    5390 F...m pulseaudio
 /dev/snd/controlC0:  etienne    5390 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Fri Dec 15 10:44:27 2017
InstallationDate: Installed on 2017-05-22 (206 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Black Headphone Out, Right
Symptom_Type: Underruns, dropouts, or "crackling" sound
Title: [N501VW, Realtek ALC668, Black Headphone Out, Right] Underruns, dropouts 
or crackling sound
UpgradeStatus: Upgraded to artful on 2017-11-26 (18 days ago)
dmi.bios.date: 11/28/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: N501VW.304
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: N501VW
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrN501VW.304:bd11/28/2016:svnASUSTeKCOMPUTERINC.:pnN501VW:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN501VW:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: N
dmi.product.name: N501VW
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug artful

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1738386

Title:
  [N501VW, Realtek ALC668, Black Headphone Out, Right] Underruns,
  dropouts or crackling sound

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  
  1. This bug happens everytime my computer wake up from sleep: a loud 
crackling noise can be heard from headphones but not from laptop speakers
  2. It disappears after reboot and audio works perfectly both through laptop 
speakers and headphones
  3. Bringing the output volume to 0 doesn't make the crackling sound disappear
  4. Bringing microphone volume to 0 doesn't make the crackling sound disappear
  5. This bug was not present in the previous version of Ubuntu used on this 
computer ie. 17.04.

  Additionnaly, headphones contain a built-in microphone.

  ```lsb_release -rd
  Description:  Ubuntu 17.10
  Release:      17.10
  ```

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: alsa-base 1.0.25+dfsg-0ubuntu5
  ProcVersionSignature: Ubuntu 4.13.0-17.20-generic 4.13.8
  Uname: Linux 4.13.0-17-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.7-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D0p:   etienne    5390 F...m pulseaudio
   /dev/snd/controlC0:  etienne    5390 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Dec 15 10:44:27 2017
  InstallationDate: Installed on 2017-05-22 (206 days ago)
  InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed
  Symptom_Card: Built-in Audio - HDA Intel PCH
  Symptom_Jack: Black Headphone Out, Right
  Symptom_Type: Underruns, dropouts, or "crackling" sound
  Title: [N501VW, Realtek ALC668, Black Headphone Out, Right] Underruns, 
dropouts or crackling sound
  UpgradeStatus: Upgraded to artful on 2017-11-26 (18 days ago)
  dmi.bios.date: 11/28/2016
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: N501VW.304
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: N501VW
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrN501VW.304:bd11/28/2016:svnASUSTeKCOMPUTERINC.:pnN501VW:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN501VW:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.family: N
  dmi.product.name: N501VW
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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