Entering alsaconf I tried setting “Auto-Mute” to “Disabled”: this way sound come from speakers even if headphones are plugged… but there is still no sound from the headphones.
And yes, I checked the headphones on other devices and they are working
Thats good news. IMHO we are very fortunate to have Takashi Iwai helping us in openSUSE - and he has IMHO helped many who have raised bug reports on sound on openSUSE.