Re: Annoying whitenoise sound coming from snd_hda enabled chipset

On Sat, Feb 21, 2009 at 2:03 PM, Alexander Motin <mav_at_freebsd.org> wrote:
> 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.

As I suggested earlier it's Line, so again I'm stuck without line-in
to my console peripherals :(.

>>    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. :(

Yes, but what about the BUGS section, etc :)?

-Garrett