[HP ZBook 17 G5, Conexant Generic, Speaker, Internal] No sound from internal speaker after plug/unplug headphone

[Nara Huang]

Release: Eoan 19.10 beta

Summary: After plug and unplug headphone, the internal speaker has no sound output.
Manually clicking output device again does not recover.
Only reboot could recover from this issue.

Reproduce steps:
1. Plug headphone
2. Unplug headphone
3. Check internal speaker output

Alsa-info link:
http://alsa-project.org/db/?f=4ee15b545978fe9f9c4a8906f1a3f3d39d885093

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.3.0-16.17-generic 5.3.1
Uname: Linux 5.3.0-16-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu7
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: nara 1758 F.... pulseaudio
 /dev/snd/controlC0: nara 1758 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 4 10:14:55 2019
InstallationDate: Installed on 2019-10-02 (1 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Beta amd64 (20190926.1)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: gdm 1072 F.... pulseaudio
                      nara 1758 F.... pulseaudio
 /dev/snd/controlC0: gdm 1072 F.... pulseaudio
                      nara 1758 F.... pulseaudio
Symptom_Jack: Speaker, Internal
Symptom_Type: No sound at all
Title: [HP ZBook 17 G5, Conexant Generic, Speaker, Internal] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/04/2019
dmi.bios.vendor: HP
dmi.bios.version: Q70 Ver. 99.07.00
dmi.board.name: 842D
dmi.board.vendor: HP
dmi.board.version: KBC Version 15.37.00
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.modalias: dmi:bvnHP:bvrQ70Ver.99.07.00:bd06/04/2019:svnHP:pnHPZBook17G5:pvr:rvnHP:rn842D:rvrKBCVersion15.37.00:cvnHP:ct10:cvr:
dmi.product.family: 103C_5336AN HP ZBook 17
dmi.product.name: HP ZBook 17 G5
dmi.product.sku: 123456#ABA
dmi.sys.vendor: HP