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 ? > On Sat, Jul 29, 2017 at 12:28:40AM +0200, Bernard Lheureux wrote: >> Hi all, >> >> I hope someone could enlighten me... >> How could I resolve the fact that the volume controls of all the >> headphones I try on CentOS 7 are not working, they are OK on CentOS >> 6 but impossible to make them work on my Thinkpad Laptop with an >> iPhone headphones or a Marshal Monitor plugged with a jack >> connector... >> Those 2 headphones work correctly in CentOS 6... >> What could I do to get the same behavior on CentOS 7 and this damned >> Gnome 3 ? >> Thanks for your help... > On Centos-7, some apps use PulseAudioVolumeControl (pavucontrol) > instead of the one that defaults to the top panel. (I am running > Mate, not Gnome--yuck--so YMMV). > > I wish there was a way to control all from a single place, but AFAICF > there isn't. for some things I use the one on the top panel (which is > Mate Volume Control) and for others I gotta start up pavucontrol. > it's a nuisance. > > My USB phones seem to be controlled by the pavu control, while the > speakers tend to be controlled by the mate volume control. and I can't > get my old analog (1/8 inch plug) headphones to work at all anymore, > no matter what control I use or how I poke at it, all the sound comes > from the speakers (which are plugged into the line out [green} jack > on the rear of the computer, while the headphones are plugged into the > green jack on the front.) > > digressing a little... A few years ago my systems all supported > auto-switching between speakers and headphones when the phone plug > was inserted, but the only one I have now that does that is my netbook. > the current desk-side system and its last couple of predecessors now > do not do that. Go figure. > -- (°- Bernard Lheureux //\ Linux System Administrator v_/_ MailTo:bernard at lheureux.be