kern/119181: snd_hda needs doesn't recognise headphones on Dell XPS-1730

David Gilbert dgilbert at
Sun Dec 30 18:20:02 PST 2007

>Number:         119181
>Category:       kern
>Synopsis:       snd_hda needs doesn't recognise headphones on Dell XPS-1730
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Dec 31 02:20:01 UTC 2007
>Originator:     David Gilbert
>Release:        FreeBSD 7.0-PRERELEASE amd64
System: FreeBSD 7.0-PRERELEASE FreeBSD 7.0-PRERELEASE #1: Thu Dec 27 18:24:52 EST 2007 dgilbert at amd64

I don't believe it's significant that I'm running in amd64 mode, but the
following are the probe details for the HDA controller:

pcm0: <Intel 82801H High Definition Audio Controller> mem 0xfebfc000-0xfebfffff irq 21 at device 27.0 on pci0
pcm0: [ITHREAD]

pcm0 at pci0:0:27:0:       class=0x040300 card=0x01f71028 chip=0x284b8086 rev=0x02 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = '82801H &SUBSYS_81EC1043&REV_02\3&11583659&0&D8'
    class      = multimedia

The laptop has two headphone ports.  They're both live --- but the speakers
don't switch out when the headphones are in use.  I see a lot of commits
to hdac.c talking about other laptops that require some software to
switch to headphones.  This one does as well.
Boot Dell XPS-1730, plug in earphones, play sounds.  Sounds still come
from speakers.

I don't know how this is fixed.


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