Re: Annoying whitenoise sound coming from snd_hda enabled chipset

On Sat, 21 Feb 2009, Alexander Motin wrote:

> Ben Kaduk wrote:
>> On Sat, Feb 21, 2009 at 8:06 AM, Alexander Motin <mav_at_freebsd.org> wrote:
>>> Garrett Cooper wrote:
>>>>    I don't know how else to describe it, but when I turn up my
>>>> speakers enough (50%+) and don't have any sound playing, I hear a
>>>> whitenoise hiss coming out of them. When I change webpages (nvidia
>>>> driver is GIANT locked) or do something else kernel intensive it stops
>>>> for a brief second, but apart from that it's an annoying trill sound
>>>> almost like a mosquito humming around me waiting to be swatted.
>>> I think it may be radio interference with disconnected microphone inputs.
>>> Try to set all unneeded mixer volumes to 0, especially mic, monitor, 
>>> speaker
>>> and mix. Inputs often have too sensitive 20-30dB pre-amplifiers. Some 
>>> codecs
>>> have them on all inputs.
>> 
>> It's hard to be sure, since I'm not sure that I could describe what I
>> hear any better than Garret did, but I think I'm seeing the same sort
>> of thing on my work desktop.  I'll try setting unneeded volumes to
>> zero the next time I'm in, and see if that helps.
>> 
>> dmesg and pciconf are available here:
>> http://stuff.mit.edu/afs/sipb.mit.edu/user/kaduk/freebsd/periphrasis/
>
> I see there some old 7.0-STABLE dmesg without any pcm. There is nothing to 
> talk about. If you wish to have good working HDA, update to recent STABLE or 
> at least take driver from there.


Oops, I had been blocking on updating from 7 to current because of
a bounce zone bug that was causing the box to panic, and I didn't
update the dmesg after I did finally upgrade.

Should be updated, now.

Sorry about that,

Ben Kaduk