misc/174876: AAfter uprading to 9-STABLE from 9.0-RELEASE plugging headphones or external speakers into the mic/audio jack doesn't cause audio to switch (Lenovo X220)

[Joseph Mingrone]

>Number:         174876
>Category:       misc
>Synopsis:       AAfter uprading to 9-STABLE from 9.0-RELEASE plugging headphones or external speakers into the mic/audio jack doesn't cause audio to switch (Lenovo X220)
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jan 01 04:00:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     Joseph Mingrone
>Release:        9-STABLE
>Organization:
>Environment:
FreeBSD phe.ath.cx 9.1-PRERELEASE FreeBSD 9.1-PRERELEASE #3 r244906: Mon Dec 31 16:28:46 AST 2012     root at phe.ath.cx:/usr/obj/usr/src
/sys/PHE  amd64 (still says 9.1-PRELEASE, but I grabbed base/stable/9)
>Description:
With 9.0-RELEASE and hw.snd.default_auto=1 in /etc/sysctl.conf audio switched like this:

- play sound through internal speakers
- plug in headphones or external speakers and sound now plays only through the headphones or external speakers

After upgrading to 9-STABLE:

- play sound through internal speakers (works)
- plug in headphones or speakers and no sound from internal speakers or headphone or external speakers

I can force the switch by togling hw.snd.default_unit to 0 for internal speakers and 1 for headphones or external speakers.
>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: