Weird Usb/sound Problem On C7

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I’m running C7, fully up to date. I’m also running the MATE desktop (from epel) though the original installation was Gnome.

a couple weeks ago my USB headset worked as both earphones and mic.

today when I plug it in I get nothing. right-clicking on the speaker icon in the upper panel I can choose “sound preferences” (as an aside, how can I figure out what program that actually is? it has no help or about option) and in the “Hardware” tab it shows several devices. One of them is the ‘Plantronics C320’ and it is listed as “Disabled”.

As far as I know I’ve done nothing to make it disabled, can anyone advise me how to UN-disable it? I can’t figure it out…

since this isn’t windoze, I’m not in the habit of rebooting every time something weird happens, but I’m wondering if that’s the practical solution for this, or not.

thanks for any advice


Oh, regarding what program it is, what appears to be the same program also exists in the menus from the top panel under System/Preferences/
Hardware/Sound. It still doesn’t identify itself, but if I right-click on it and choose add launcher to desktp, I can then right-click on it, choose Properties, and see it is “mate-volume-control”. I’ll do some searching on that name for advice, and if I turn up anything I’ll post it here.