Annoying whitenoise sound coming from snd_hda enabled chipset

[Yoshihiro Ota]

On Sat, 21 Feb 2009 13:56:35 -0800
Garrett Cooper <yanefbsd at gmail.com> 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.
>     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 ><...
> Thanks,
> -Garrett

I think I started seeing similar issues.
When I boot 8-CURRENT, it makes some low yet very silent noise, too.

In my case, with hdac or pcm device, 8-CURRENT fails to boot very requentry.
It fails to prove a device and doesn't proceed farthar than that point.
Now it only boots once in 5 or 10 reboots.

When it boots, it prints lots of following messages.

hdac0: HDA Codec #0: Conexant CX20549 (Venice)
hdac0: unable to allocate widgets!
hdac0: unable to allocate widgets!
hdac0: unable to allocate widgets!
hdac0: unable to allocate widgets!
hdac0: unable to allocate widgets!
hdac0: hdac_command_send_internal: TIMEOUT numcmd=1, sent=1, received=0
hdac0: hdac_command_send_internal: TIMEOUT numcmd=1, sent=1, received=0
hdac0: hdac_command_send_internal: TIMEOUT numcmd=1, sent=1, received=0
hdac0: hdac_command_send_internal: TIMEOUT numcmd=1, sent=1, received=0
hdac0: hdac_command_send_internal: TIMEOUT numcmd=1, sent=1, received=0

I think this started happening about a week ago or so, sometime between
13 and 16th.

Thanks,
Hiro