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I have recently installed ubuntu and am having trouble with my soundcard. It is an external usb card (the laptop also has an inbuilt intel one which I am not using).

The problem is that when I change the volume any value below 100% the sound immediately mutes. I can only hear sound if the volume control is a 100%. I can change the volume level within applications, but not system wide. In alsa-mixer I can change the volume fine, but as soon as I reduce the volume using hotkeys or through the system settings it goes mute.

I assume it is a driver issue as lsusb shows my device as: Bus 002 Device 003: ID 0d8c:0006 C-Media Electronics, Inc. Storm HP-USB500 5.1 Headset though it is an external soundcard, not a headset.

Any help much appreciated.

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