Subject: kern/21322: cmpci mixer broken
To: None <>
From: None <>
List: netbsd-bugs
Date: 04/26/2003 10:46:13
>Number:         21322
>Category:       kern
>Synopsis:       cmpci mixer broken
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Apr 25 22:47:00 UTC 2003
>Originator:     Gregory McGarry
>Release:        NetBSD 1.6R
System: NetBSD 1.6R
Architecture: i686

cmpci0 at pci0 dev 11 function 0: vendor 0x13f6 product 0x0111 (rev. 0x10)
cmpci0: interrupting at irq 10
audio1 at cmpci0: full duplex, mmap, independent
opl at cmpci0 not configured
mpu at cmpci0 not configured


It seems that if you access cmpci through the /dev/audio interface,
it resets the mixer settings to default values.  By my understanding,
which matches other sound drivers, only the recording/playing parameters
should be reset, not the mixer settings.

Try using /dev/audio and wonder why the microphone keeps muting
itself.  If you use /dev/sound, it works!


Unfortunately, it cannot be repeated using audiorecord.  Probably because
it fiddles with the monitor gain, which probably progagates down into the
cmpci driver and fixes the mixer.  I can supply code on demand.