amd64/150284: No gain with Audio

[Brodey Dover]

>Number:         150284
>Category:       amd64
>Synopsis:       No gain with Audio
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-amd64
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Sep 04 17:20:04 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Brodey Dover
>Release:        FreeBSD 8.1 - RELEASE
>Organization:
>Environment:
FreeBSD pcbsd-4922 8.1-RELEASE FreeBSD 8.1-RELEASE #1: Sat Jul 17 14:19:59 PDT 2010     root at build8x64.pcbsd.org:/usr/obj/usr/pcbsd-build81/fbsd-source/8.1/sys/PCBSD  amd64

>Description:
Even with controls maxed out, there is no audio gain and the line-level volume is passed through.

drivers seem to load:
[brodey at pcbsd-4922 /usr/home/brodey]$ cat /dev/sndstat 
FreeBSD Audio Driver (newpcm: 64bit 2009061500/amd64)
Installed devices:
pcm0: <HDA Analog Devices AD1988B PCM #0 Analog> (play/rec) default
pcm1: <HDA Analog Devices AD1988B PCM #1 Analog> (play)
pcm2: <HDA Analog Devices AD1988B PCM #2 Digital> (play)

Mixer seems fine:
[brodey at pcbsd-4922 /usr/home/brodey]$ mixer
Mixer vol      is currently set to 100:100
Mixer pcm      is currently set to 100:100
Mixer speaker  is currently set to   1:1
Mixer line     is currently set to   0:0
Mixer mic      is currently set to 100:100
Mixer cd       is currently set to   0:0
Mixer mix      is currently set to   0:0
Mixer rec      is currently set to   0:0
Mixer igain    is currently set to   0:0
Mixer ogain    is currently set to 100:100
Mixer monitor  is currently set to   0:0
Recording source: mic

>How-To-Repeat:
Use FreeBSD 8.1+ 
>Fix:
None known

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