I've just installed Kubuntu 20.04 and I'm trying to use my speakers, although the headphones jack is connected.
When I connect the headphones, I can see in pavucontrol-qt "analogue headphones" as the output device and when i change it to line-out, the sound dissapears.
But when I unplug my headphones, the output device changes automatically to line-out and sound gets out perfectly from the speakers.
Enabling "simoultaneous output" in paprefs but it doesnt work.
Changing the Mute in alsamixer
With this one, I saw that the headphones are mutted with line-out. When I unmute them, they sound, but still not the speakers.
I made the speakers sound disabling auto-Mute, but now I can't hear the headphones, although they are connected.
There is another problem: I cannot route applications between headphones and line-out, there are just two options: analog stereo internal audio and simultaneous output to analog stereo internal audio (with this one is the same problem: either speakers with disabling auto-mute, or headphones).
If it is needed:
and a bild of output devices:
In "audio interno estéreo analógico" ports are the headphones or line-out options.
Motherboard: GA970A-DS3P (Rev.2.x) Audio Realtek ALC887 codec NOTE: I'm using just Realtek audio, I don't use HDMI audio