Re: Annoying whitenoise sound coming from snd_hda enabled chipset

Garrett Cooper wrote:
> On Sat, Feb 21, 2009 at 10:35 AM, Benjamin Kaduk <kaduk_at_mit.edu> wrote:
>> 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
> 
>     Unfortunately I must use mix though or line-in doesn't function
> from my console peripherals. It does appear to be the culprit
> unfortunately.

Have you tried to mute other sources specifically? mix is just a sum of 
inputs, it is not an input itself. You may read driver verbose boot 
messages to find which inputs are mixed and how they controlled.

>     So I suppose I have to live with this issue until my SB Audigy
> card comes :(? This is something that should be noted in the driver
> manpage or you'll get more annoyed folks with support emails like this
> one ><...

It won't help. People never read manuals, especially long ones. :(

-- 
Alexander Motin