Sound Troubleshooting Ubuntu
Open a terminal window. sudo apt-get install pavucontrol Now start pavucontrol and see how the sliders are. You start pavucontrol via the Fast Finder or via the terminal: you simply tap: pavucontrol (and press Enter). pay attention: move the sliders do not all open at once, and no more than 90 % (deformation). If this solution doesn't work
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