[CentOS] Headphones volume control not working in CentOS 7

Sun Jul 30 20:55:31 UTC 2017
John R Pierce <pierce at hogranch.com>

On 7/30/2017 1:37 PM, Bernard Lheureux wrote:
> On 29/07/2017 02:15, Fred Smith wrote:
> Anybody have the same problem that I have with JACK plugged headphones 
> (analogic) ?
> The volume controls on the cable of the headphones do not work on 
> CentOS 7 on my Lenovo Thinkpad T530...
> How could I solve this ? 

volume controls on analog headphones are purely analog, the computer 
doesn't even know its there, its just an attenuator on the analog signal.

john r pierce, recycling bits in santa cruz