Camera or its microphone doesn't work

[Artiom Neganov]

Given:
Microsoft LifeCam VX-2000 USB camera
Worked without any issues on Kubuntu 14.04
Works without any issues on Kubuntu 16.04 in vokoscreen and Audacity, it is displayed in `pavucontrol` on the Input Devices tab and the bar is animated.

Problem:
The camera doesn't work in the current Skype Beta 5.4, in Google Chrome, in Firefox. If a websites requests permissions to access microphone, in Firefox appears a popup with devices and there I can select the cam, but after that no sound really comes through and the LED on the cam is OFF.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.22
ProcVersionSignature: Ubuntu 4.10.0-32.36~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-32-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: KDE
Date: Sat Aug 26 03:33:16 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2017-08-21 (4 days ago)
InstallationMedia: Kubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: dist-upgrade
UpgradeStatus: No upgrade log present (probably fresh install)

[Artiom Neganov (aneganov)]

I've uninstalled 16.04 because I've realized that LTS is just a silly sticker meaning nothing practical: people from IRC (#kde) couldn't provide any help because they're basically don't use such an old Plasma desktop which is shipped with 16.04 - it is about two years old.

So I've installed 17.04 and re-tried all my attempts and still no any success: camera doesn't work in the system, in Skype for example. This is a bad thing to my mind because it worked previously on 14.04 but now it doesn't work neither in 16.04 or 17.04.