Re: Annoying whitenoise sound coming from snd_hda enabled chipset

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.

-- 
Alexander Motin