CentOS - Jan 2017 - Mate and USB headphones

Logitech H540 headphones were working fine.

Suddenly stopped.

Sound Preferences says they are disabled but gives no hints on how to 
enable them, or how they became disabled.

Tried rebooting, unplugging them, etc.

Anyone know what is going on?

This motherboard doesn't have onboard sound, this USB is my only option. 
And GNOME simply isn't usable for me, I used GNOME for years but GNOME 3 
literally gets in my way all the freaking time trying to force me to do 
things the new way that just aren't conductive to my thinking style - so 
MATE is what I use.

I have no clue how these headphones became "disabled" or how to change
them back to enabled.

On Sat, Jan 7, 2017 at 10:23 PM, Alice Wonder <alice at domblogger.net>
wrote:
> Logitech H540 headphones were working fine.
>
> Suddenly stopped.
>
>
Maybe a stupid question, but did you try your headphones on another
computer?
Is the device listed in the ouput of command "lsusb"?

-- 
Laurent.

On 01/07/2017 01:42 PM, Laurent CREPET wrote:
> On Sat, Jan 7, 2017 at 10:23 PM, Alice Wonder <alice at
domblogger.net> wrote:
>
>> Logitech H540 headphones were working fine.
>>
>> Suddenly stopped.
>>
>>
> Maybe a stupid question, but did you try your headphones on another
> computer?
> Is the device listed in the ouput of command "lsusb"?
>
I got that to work.

I had to remove the blacklist for the useless Intel HD audio on the 
video card that CentOS 7 likes to pick by default even though the video 
card doesn't have an audio out except HDMI - but with that driver 
allowed, the audio system reset and the USB headphones are no longer 
listed as disabled.

There has to be a better way and there needs to be a way to enable a 
device that is listed as disabled for unknown reasons, serious UI issue.

I don't understand why the sound control panel doesn't allow one to 
enable a device it has listed as disabled.

The disabled kernel module was for Intel HD which is NOT what the USB 
headphones uses, and it works fine with that kernel module disabled, it 
just wouldn't let me enable the headphones after whatever disabled them 
disabled them.