Hello Lehel,

Indeed, you are right. My output is different from yours, and I get what
you indicate in your previous message. However, the result is quite
similar because my headphones jack does not work at all (no plug in
detection, no sound) and the model came from the same original
manufacturer (Clevo).

Today, I applied another update to the kernel (where I think is the main
problem) and the ubuntu-drivers package (probably related, but not very
likely). After reboot, the headphones worked again. Then, I decided to
suspend and resume to check if the headphones still worked. This time, I
did not tested the simultaneous connection headphones + ext. mic.  No
luck, though. The headphones stopped working again.

I am not sure if the root cause is the same for your bug and mine, but I
am pretty sure at this point that there is a problem with the
snd_hda_codec driver at kernel level. So far, the repeating cycle is:

- I apply a new kernel update, then reboot.
- After first reboot, I have again sound through the headphones connection. 
Quality is really superb, much better than line out (not sure if due to lower 
impedance of headphones jack or because the driver was improved).
- If I suspend and resume, the headphones connection stops working again.
- After next reboots, the headphones do not work at all anymore.

My guess is that we can only patiently wait for some kernel developer to
take a look at this at some point, and deliver a solution upstream, that
can be then transferred to Ubuntu users.

For now, I will have to settle for using the line out to listen to
spotify in the library while working.

Best regards,
Felipe.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1791806

Title:
  alsa does not detech headphone output on Clevo P651RS laptop

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Even though there is a duplex S/Pdif + Headphones out output the
  following line is observed:

  [   13.617774] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC898: 
line_outs=1 (0x17/0x0/0x0/0x0/0x0) type:line
  [   13.617776] snd_hda_codec_realtek hdaudioC0D0:    speaker_outs=1 
(0x14/0x0/0x0/0x0/0x0)
  [   13.617778] snd_hda_codec_realtek hdaudioC0D0:    hp_outs=0 
(0x0/0x0/0x0/0x0/0x0)
  [   13.617779] snd_hda_codec_realtek hdaudioC0D0:    mono: mono_out=0x0
  [   13.617780] snd_hda_codec_realtek hdaudioC0D0:    dig-out=0x1e/0x0
  [   13.617781] snd_hda_codec_realtek hdaudioC0D0:    inputs:
  [   13.617782] snd_hda_codec_realtek hdaudioC0D0:      Mic=0x18
  [   13.617783] snd_hda_codec_realtek hdaudioC0D0:      Internal Mic=0x12
  [   13.632784] input: HDA Intel PCH Mic as 
/devices/pci0000:00/0000:00:1f.3/sound/card0/input19
  [   13.632851] input: HDA Intel PCH Line Out as 
/devices/pci0000:00/0000:00:1f.3/sound/card0/input20
  [   13.632905] input: HDA Intel PCH HDMI/DP,pcm=3 as 
/devices/pci0000:00/0000:00:1f.3/sound/card0/input21
  [   13.632953] input: HDA Intel PCH HDMI/DP,pcm=7 as 
/devices/pci0000:00/0000:00:1f.3/sound/card0/input22
  [   13.632989] input: HDA Intel PCH HDMI/DP,pcm=8 as 
/devices/pci0000:00/0000:00:1f.3/sound/card0/input23
  [   13.633108] input: HDA Intel PCH HDMI/DP,pcm=9 as 
/devices/pci0000:00/0000:00:1f.3/sound/card0/input24
  [   13.633291] input: HDA Intel PCH HDMI/DP,pcm=10 as 
/devices/pci0000:00/0000:00:1f.3/sound/card0/input25
  ---
  ProblemType: Bug
  ApportVersion: 2.20.9-0ubuntu7.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  lehel      1673 F.... pulseaudio
  CurrentDesktop: XFCE
  DistroRelease: Ubuntu 18.04
  HibernationDevice: RESUME=UUID=14306ed9-327a-44fd-8c4d-2eba92aa55c0
  InstallationDate: Installed on 2017-04-30 (499 days ago)
  InstallationMedia: Xubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
  MachineType: Notebook P65_67RSRP
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-34-lowlatency 
root=/dev/mapper/xubuntu--vg-root ro noquiet nosplash i915.modeset=1 acpi_osi=! 
"acpi_osi=Windows 2009"
  ProcVersionSignature: Ubuntu 4.15.0-34.37-lowlatency 4.15.18
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-34-lowlatency N/A
   linux-backports-modules-4.15.0-34-lowlatency  N/A
   linux-firmware                                1.173.1
  Tags:  bionic
  Uname: Linux 4.15.0-34-lowlatency x86_64
  UpgradeStatus: Upgraded to bionic on 2018-08-23 (18 days ago)
  UserGroups: adm bumblebee cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 09/14/2016
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1.05.04
  dmi.board.asset.tag: Tag 12345
  dmi.board.name: P65_67RSRP
  dmi.board.vendor: Notebook
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Notebook
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1.05.04:bd09/14/2016:svnNotebook:pnP65_67RSRP:pvrNotApplicable:rvnNotebook:rnP65_67RSRP:rvrNotApplicable:cvnNotebook:ct10:cvrN/A:
  dmi.product.family: Not Applicable
  dmi.product.name: P65_67RSRP
  dmi.product.version: Not Applicable
  dmi.sys.vendor: Notebook

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