[solved] Speaker and Headphone channels

[malc]

My speaker and headphone channels are one and the same.  Needless to say this causes a problem since I can't mute my speakers and listen in peace (for others) on my headphones.

Using KMIX the speaker channel controls the headphone channel as well. The headphone channel does nothing.

I have tried varies options of master channel and configuring sound through PCC selecting various options.

This occurred after I installed PCLOS2010, PCLOS2009/KDE4 was fine. So what changed and how do I fix it?

My relevant hardware specs:
Laptop - Acer aspire 7736G
Soundcard/driver :-
snd_hda_intel   : nVidia Corporation|High Definition Audio Controller (vendor:10de device:0be3 subv:1025 subd:0296) (rev: a1)
snd_hda_intel   : Intel Corporation|82801I (ICH9 Family) HD Audio Controller (vendor:8086 device:293e subv:1025 subd:0296) (rev: 03)


thanks,

Malcolm

[luikki]

did you try kmixer, settings, configure channels and drag and drop "headphone" to the list of visible channels?

[malc]

Luikki - yes that was the problem, the headphone channel in KMIX does nothing.

However - problem solved (internet trawling), a known Acer laptop issue with Alsa sound which is solved as follows:

1. PCC
     > Hardware
       > Browse and Configure Hardware
         > Soundcard
           > Select audio controller (either one)
             > Set current driver options
               > model - acer
2. Reboot

KMIX will now have "Surround" and "Front" channels where surround is the laptop speakers and front is the headphones.  Funnily enough the headphone channel no longer has a slider and so needs to be removed.

*** I have read about a number of sound issues. If you have an Acer maybe the above fix and not using the "obvious" channels is a solution.

all the best,

Malcolm