20% of volume is like 0%

[Edson Passos]

There is no sound on my laptop when volume is set to 20% or less.
Also, when I set it to 100%, its output is lower than on Windows.
The problem occurs when using a headphone as well.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18
Uname: Linux 4.15.0-36-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/pcmC0D0p: roinujnosde 1600 F...m pulseaudio
 /dev/snd/controlC0: roinujnosde 1600 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Thu Oct 25 13:33:21 2018
InstallationDate: Installed on 2018-10-09 (15 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: Áudio interno - HDA Intel PCH
Symptom_Jack: Speaker, Internal
Symptom_PulseAudioLog: out 25 08:30:58 edson-ideapad dbus-daemon[782]: [system] Activating via systemd: service name='org.freedesktop.RealtimeKit1' unit='rtkit-daemon.service' requested by ':1.27' (uid=121 pid=1007 comm="/usr/bin/pulseaudio --daemonize=no " label="unconfined")
Symptom_Type: Volume slider, or mixer problems
Title: [80YH, Realtek Generic, Speaker, Internal] volume slider problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/24/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: 4WCN39WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: Cairo 5A
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40679 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo ideapad 320-15IKB
dmi.modalias: dmi:bvnLENOVO:bvr4WCN39WW:bd02/24/2018:svnLENOVO:pn80YH:pvrLenovoideapad320-15IKB:rvnLENOVO:rnCairo5A:rvrSDK0J40679WIN:cvnLENOVO:ct10:cvrLenovoideapad320-15IKB:
dmi.product.family: IDEAPAD
dmi.product.name: 80YH
dmi.product.version: Lenovo ideapad 320-15IKB
dmi.sys.vendor: LENOVO

[Cristian Aravena Romero (caravena)]

Did this issue start happening after an update/upgrade? Was there a
prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.19 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as
"Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.19

[Edson Passos (roinujnosde)]

"Did this issue start happening after an update/upgrade? Was there a
prior kernel version where you were not having this particular problem?"
This is the first time I install Ubuntu/Linux on my laptop.

"Would it be possible for you to test the latest upstream kernel?"
Yes, but I'm gonna backup my files first.

[Daniel van Vugt (vanvugt)]

Please try setting:

  Settings > Sound > Over-Amplification = ON

Does that fix it?

[Edson Passos (roinujnosde)]

It does not.
Still no sound on <20%.
But over 100%, it did increase the volume output without distortions.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Edson Passos (roinujnosde)]

Is there a way to edit the base volume on my end?
Currently it's 100% -> 0db.
It could be 100% -> +11db.