Title says it all. This is a new issue (not sure after which update). My headphones are correctly selected as Output in the “Sound” Settings but no sound coming out.
The only solution I’ve found so far (on the internet) is to run alsactl restore but I don’t want to have to do that every time I re-plug my headphones!
Actually in my Linux world there’s always a way. I had the same problem, this worked for me:
Open your terminal and type sudo nano crontab -e nano will open. Then add at the end: @reboot alsactl restore, then save the file. Actually will not execute this command each time you re-plug your headphones, it will execute it at boot, but it worked for me, I hope it works for you.