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I can hear rythmbox songs and Internet videos perfectly, but my screen sound icon is always greyed and muted, and I cannot use it for turn up and down sound volume...

Any advice would be of great help. Thanks in advance.

Joan
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2 Answers2

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After some investigation, I solved the question using the first answer for that question > https://askubuntu.com/questions/33089/what-user-settings-control-audio-access

Joan
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I just had this problem on Ubuntu 16.04. I used this to fix the problem:

killall pulseaudio; rm -r ~/.config/pulse/* ; rm -r ~/.pulse*; ~/.config/pulse