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Date:      Sun, 05 Jan 2020 15:42:21 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 243116] Apple hardware with Realtek ALC889A no sound
Message-ID:  <bug-243116-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D243116

            Bug ID: 243116
           Summary: Apple hardware with Realtek ALC889A no sound
           Product: Base System
           Version: 12.1-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: jwb@freebsd.org

There appear to be several Mac models with this issue.  I found a workaround
using device hints here:

https://forums.freebsd.org/threads/macbook-pro-5-1-realtek-alc889a-sound-se=
tup.56061/


hint.hdaa.0.config=3D"ovref"
hint.hdaa.0.gpio_config=3D"0=3Dset"

For headphone jack autoswitch:

hint.hdaa.0.nid20.config=3D"as=3D4 seq=3D15"

Might it be possible to tweak the base to make these models work out of the
box?

I'm familiar with buildkern/buildworld in case either is necessary to test a
fix.

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