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. -- ---- Fred Smith -- fredex at fcshome.stoneham.ma.us ----------------------------- I can do all things through Christ who strengthens me. ------------------------------ Philippians 4:13 -------------------------------