No microphone input in RHEL 7

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Just installed RHEL 7 and Skype. Found out the there is no microphone input.
Checked the sound settings and found out that the microphone input does not work.

The computer Dell Optiplex 755 has an integrated Intel audio card. Tried various things which did not work.
Cannot find or install sndconfig.

Any ideas?

Christian

ec
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Responses

Robert Krátký's picture Red Hat Guru 3240 points
3 November 2014 5:21 PM

Hi Christian,

Could you please provide a little more detail? Specifically:

  • You mentioned that microphone input doesn't work in sound settings. Did you mean the Input tab in the Sound window under Settings? If so, does that tab show any input device listed in the lower half of the window (Choose a device for sound input:)?

  • If there is a sound device listed, it means that the system has recognized the input device in your laptop but failed to configure it properly. That should be easy to deal with. First, make sure that the button next to Input volume: is set to ON, and that the volume is turned up. Then we can try some other things.

  • If there is no sound device listed in the Input tab, then try to run cat /proc/asound/cards in a Terminal and see if it shows anything.

When we have this information, we can continue to try and troubleshoot the problem.

JL Red Hat Newbie 7 points
13 June 2017 11:32 PM

I have the exact same problem. The content of /proc/asound/cards shows me my USB microphone but the device is not listed in the system settings list of audio devices.

If someone has a hint on what to do next it would be appreciated.

ec Newbie 10 points
3 November 2014 9:43 PM

Hi Robert,

Thank you for responding. In retrospect, I should have shared the answer to my own question, which was embarrassingly simple. I had been plugging the headphone and mike in the corresponding jacks at the back of the desktop. In this way I would get very good headphone output and extremely faint mike input. I tried all instructions I could find, but nothing worked. Eventually, I found out that there are two jacks in front of the computer, which worked immediately. Problem resolved.

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