kern/52912: hdafg: no sound from jack port on a laptop

[jake.slazenger%yandex.com@localhost]

>Number:         52912
>Category:       kern
>Synopsis:       hdafg: no sound from jack port on a laptop
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jan 08 06:50:00 +0000 2018
>Originator:     Jake Slazenger
>Release:        CURRENT-8.0-171230
>Organization:
>Environment:
NetBSD localhost 8.0_BETA NetBSD 8.0_BETA (RUSTY) #0: Sun Jan  7 16:30:08 MSK 2018  rusty@localhost:/usr/src/171230/src/sys/arch/amd64/compile/RUSTY amd64
>Description:
When I connect headphones to jack port on my laptop with Realtek ALC268 sound chip, sound is not switching to the headphones and continues to come out from built-in speakers.

For example, on Linux-based systems sound is automatically switches when headphones is connected.

Is it a bug, or I do something wrong and it can be switched manually?
>How-To-Repeat:
Connect headphones to jack port on a laptop with Realtek ALC268 sound chip.
>Fix: