I don't know if my problem is related specifically to the Realtek AC256 codec. In any case, it seems FreeBSD folk fixed a while back the same issue: no headphone output through some patches related to this codec on some Dell models.
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219350 https://github.com/trueos/trueos/pull/279 https://reviews.freebsd.org/D19017 ** Bug watch added: bugs.freebsd.org/bugzilla/ #219350 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219350 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1850702 Title: [Samsung Notebook 7 Pro, Realtek ALC256, headphone jack] Headphone sound is faint and distorted (but works fine in Windows) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1850702/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
