[UX550VD, Realtek ALC295, Black Headphone Out, Front] No sound at all

[Mohammadreza Saed]

I just installed Ubuntu 18.04.5 LTS on Asus Zenbook UX550VD laptop. Speakers work fine, but I have no sound when I plug in headphones to the audio jack.
Ubuntu recognizes headphones as I can seen it in settings. Tried alsamixer and Unmuted everything, still no sound.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.4.0-47.51~18.04.1-generic 5.4.55
Uname: Linux 5.4.0-47-generic x86_64
NonfreeKernelModules: nvidia_modeset wl nvidia
ApportVersion: 2.20.9-0ubuntu7.17
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: mrs 1540 F.... pulseaudio
 /dev/snd/pcmC0D0p: mrs 1540 F...m pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Fri Sep 18 16:19:16 2020
InstallationDate: Installed on 2020-09-18 (0 days ago)
InstallationMedia: Ubuntu 18.04.5 LTS "Bionic Beaver" - Release amd64 (20200806.1)
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_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: gdm 1071 F.... pulseaudio
                      mrs 1540 F.... pulseaudio
 /dev/snd/pcmC0D0c: mrs 1540 F...m pulseaudio
 /dev/snd/pcmC0D0p: mrs 1540 F...m pulseaudio
Symptom_Jack: Black Headphone Out, Front
Symptom_Type: No sound at all
Title: [UX550VD, Realtek ALC295, Black Headphone Out, Front] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/05/2017
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX550VD.300
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX550VD
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.:bvrUX550VD.300:bd06/05/2017:svnASUSTeKCOMPUTERINC.:pnUX550VD:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX550VD:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: UX
dmi.product.name: UX550VD
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

[Mohammadreza Saed (mrsaed)]

Got it working by disabling Windows 10 fast startup.