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I noticed that the volume control when I use xubuntu is not really working properly.

I can see, that xubuntu is recognizing that it should do something and displays a small image indicating volume up/down or mute. But, it is not affecting the sound I hear for instance while using youtube.

When I open my PulseAudio I see in Output Devices Tab two devices: Built in Audio Digital Stereo and Built-in Analog Stereo. The indication for sound volume for the first device actually does react when I press the media keys for volume up/down. But this should be the second device that should be controlled by my media keys. So the question is, how do I change the device controlled by media keys?

Also, I noticed, that under Ubuntu the media keys work fine, and it is possible to control volume with them..

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Turn off the Output you don't want. – Uri Herrera Oct 13 '12 at 22:38
Yes, how do I do that though? – Aja Oct 14 '12 at 15:42

I had the same trouble. The advice on this page fixed it for me:

In short: Settings -> Settings Editor Find the section xfce4-mixer. Set the value of property active-card to the same as the value of sound-card.

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