Input level keeps changing even when there's no Mic attached

Bug #1746141 reported by David Chen on 2018-01-30
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
alsa-driver (Ubuntu)
Undecided
Unassigned

Bug Description

Summary:
On a device without build-in microphone, plug-unplug headset, on gnome-control-center sound setting input tab, input level keeps going up and down even without mic/headset attached.

Steps to reproduce:
1. Fresh install Ubuntu 17.10.1 image
2. Boot up the device
3. Plug a headset(with mic) in the GHS jack
4. Open Sound settings(gnome-control-center)
5. Switch to "Input" tab, adjust the input volume amplifier to 100%, and then notice that input level will start to float
6. Leave sound setting UI as open, unplug the headset => Problem: input volume amplifier is still editable and input level keeps floating.

Expected behavior:
Ideally, when headset is unplugged, the input volume amplifier should become in-editable and input level shouldn't keep floating.

Actual behavior:
Input level keeps moving.

David Chen (david.chen) on 2018-01-30
Changed in alsa-driver (Ubuntu):
status: New → Confirmed
description: updated
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