Input ports suddenly disabled

[butylkus]

Hello.
Have a very annoying problem: any input sound port I try to use starts muted and don't let me to unmute it.
Only reattaching make em alive. What a stupid behaviour?
Here is a screenshot with typically muted line-in that is out of control.

I can't drag control pin.

[butylkus]

A very wrong workaround I use now is:

First looking for cards:

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inxi -Fxz

It shows:

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Audio:
  Device-1: Intel 7 Series/C216 Family High Definition Audio 
  vendor: Micro-Star MSI driver: snd_hda_intel v: kernel bus ID: 00:1b.0 

So now I can manually kickstart

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pacmd set-default-source alsa_input.pci-0000_00_1b.0.analog-stereo

But it works not always.

[butylkus]

Got any useful bugfix, anyone?