Volume scaling is incorrect for Logitech H600 (046d:0a29): alsamixer @ 0% where pulse volume @ 50%

Bug #1843819 reported by Jacob Godserv on 2019-09-12
This bug affects 2 people
Affects Status Importance Assigned to Milestone
pulseaudio (Ubuntu)

Bug Description

When the volume is set to around 50% in PulseAudio (using the Ubuntu Sound preferences screen but cross-checked by simply viewing with pavucontrol) the alsamixer volume is set to 0%. I can see the volume rise quickly as the volume is raised past 50% in the Sound preferences screen.

This occurs at least for the Logitech H600 USB device:
Bus 001 Device 011: ID 046d:0a29 Logitech, Inc. H600 [Wireless Headset]

The other audio devices behave "correctly" where 0% is silent and 100% is maximum volume.

This confused me because the volume was set to 50% (I'll frequently reset headset volume to 30-50% to protect my ears) and thought audio was broken at first because I wasn't getting any sound at all.

Daniel van Vugt (vanvugt) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:

apport-collect 1843819

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

Changed in pulseaudio (Ubuntu):
status: New → Incomplete
Edwin Lee (leeed2001) wrote :

I can confirm this exact same behavior. It occurred on my H600, in both Ubuntu 18.10 and 19.04. Makes for very strange volume effects, especially to those who don't know to investigate with pavucontrol and alsamixer.

Jacob Godserv (fun2program8) wrote :

apport-collect says that I'm not the reporter or that the bug is closed/resolved.

Changed in pulseaudio (Ubuntu):
status: Incomplete → New
status: New → Incomplete
Jacob Godserv (fun2program8) wrote :

Ah, I made a typo. Now it's working; however the information it wants to send contains my username which I don't want made public for privacy reasons.

Jacob Godserv (fun2program8) wrote :

Here we go. I was able to replace identifying information (that I care about). Hopefully this is what you need.

Changed in pulseaudio (Ubuntu):
status: Incomplete → New
tags: added: disco
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