[Bug 1925481] [NEW] The sound input level is not adjustable

[liuning]

Public bug reported:

Context:
 Step 3 in"Ukui-control-center(Ubuntu Kylin) in Ubuntu Kylin Desktop amd64" in Hirsute Final (version 20210420).
Configuration:x86 Physical machine installation
Actual results:
In the settings of the control panel, the adjustment bar under the sound is grayed out and cannot be adjusted
Expected results:
In the settings of the control panel, the adjustment bar under the sound can be adjusted

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "图5.jpg"
   https://bugs.launchpad.net/bugs/1925481/+attachment/5490978/+files/%E5%9B%BE5.jpg

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https://bugs.launchpad.net/bugs/1925481

Title:
  The sound input level is not adjustable

Status in ubiquity package in Ubuntu:
  New

Bug description:
  Context:
   Step 3 in"Ukui-control-center(Ubuntu Kylin) in Ubuntu Kylin Desktop amd64" in Hirsute Final (version 20210420).
  Configuration:x86 Physical machine installation
  Actual results:
  In the settings of the control panel, the adjustment bar under the sound is grayed out and cannot be adjusted
  Expected results:
  In the settings of the control panel, the adjustment bar under the sound can be adjusted

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