First.. sorry about the english, not my native language.
I have two sound cards. Onboard intel and HDMI NVidia vga/audio card.
KDE multimedia settings shows HDMI as default device. In this setting my speakers (connected to onboard) still works but, no sound from front panel (where i connect my headphones). Multimedia settings allow me to switch from hdmi to "default built in device" (on board). While using default built in device i am able to choose between line (my speakers) or headphones (frontal panel). problem is, nothing of this survives a reboot. And when i plug the headphones i have to manually select them. So.. how to make de changes in KDE gui survive a reboot and have simultaneous output to line and front panel.

I haven't played with sound enough on 14.2 yet, but have you tried pavucontrol? It's pulseaudio's native volume controller, and I believe it allows you to set the primary audio device (and it should survive reboots).

1 members found this post helpful.

Use pavucontrol ?

I agree! It is what I use. I load it up and dragged it onto my panel for easy access.

I had similar problems with KMix when I connected my speakers, smart tv, and headphones. With KMix I was unable to configure as I needed. pavucontrol fixed everything quickly.

sorry the delay. pavucontrol only shows hdmi device (onboard sound not listed on the dropdown menu). also tried paprefs to create a virtual device for simultaneous playback on all devices. so far no results. Thank you for your time.

What drop down menu are you talking about and in which tab of pavucontrol?

following another forums i removed ~/.config/pulse (leaving only the systemwide /etc/pulse/) now on pavucontrol i have both hdmi and built in audio device (output tab). but.. in the built in audio device i still have to choose between line and headphones (front panel)