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Date:      Tue, 25 May 2010 12:06:40 +0200
From:      Mark Stapper <stark@mapper.nl>
To:        Garrett Cooper <yanefbsd@gmail.com>
Cc:        stable@freebsd.org, multimedia@freebsd.org
Subject:   Re: Buzzing snd_emu10kx enabled card with r206173
Message-ID:  <4BFBA130.6060506@mapper.nl>
In-Reply-To: <4BF23029.80104@mapper.nl>
References:  <u2q7d6fde3d1004051122madc6ebb4jc3248d8c68a81333@mail.gmail.com>		<x2m7d6fde3d1004051226k7a0e350bz579b899e4fedd977@mail.gmail.com>		<p2v7d6fde3d1004060339nfdbc4cb9p9ac6e232e38b4d6@mail.gmail.com>		<q2l7d6fde3d1004120729h2d32e696g4182af399580ca01@mail.gmail.com>		<4BF1891F.3040704@mapper.nl>	<AANLkTinMAEAplBOh-gK-2LS1i_XJijafF_Nbg0lwn8YG@mail.gmail.com> <4BF23029.80104@mapper.nl>

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On 18/05/2010 08:14, Mark Stapper wrote:
> On 18/05/2010 00:22, Garrett Cooper wrote:
>  =20
>> On Mon, May 17, 2010 at 11:21 AM, Mark Stapper <stark@mapper.nl> wrote=
:
>>  =20
>>    =20
>>> On 12/04/2010 16:29, Garrett Cooper wrote:
>>>    =20
>>>      =20
>>>> On Tue, Apr 6, 2010 at 3:39 AM, Garrett Cooper <yanefbsd@gmail.com> =
wrote:
>>>>
>>>>      =20
>>>>        =20
>>>>> On Mon, Apr 5, 2010 at 12:26 PM, Garrett Cooper <yanefbsd@gmail.com=
> wrote:
>>>>>
>>>>>        =20
>>>>>          =20
>>>>>> On Mon, Apr 5, 2010 at 11:22 AM, Garrett Cooper <yanefbsd@gmail.co=
m> wrote:
>>>>>>
>>>>>>          =20
>>>>>>            =20
>>>>>>> Hi,
>>>>>>>    When I first installed FreeBSD on this machine, I had a heck o=
f a
>>>>>>> time getting the soundcard's PCM channel to function properly. It=

>>>>>>> would buzz incessantly when I played any audio on it; I disabled =
the
>>>>>>> onboard snd_hda enabled audio and things magically worked, until
>>>>>>> today. After a kernel upgrade and a few warm boots, I'm back to w=
here
>>>>>>> I started from -- the PCM channel buzzes whenever I play audio;
>>>>>>> line-in works perfectly fine however. I'm not seeing anything out=
 of
>>>>>>> the ordinary in commits over the past couple of weeks for the pcm=

>>>>>>> pieces (the last successful kernel I used was 2~3 weeks old).
>>>>>>>    Are there any device_printf's I should add or a debug procedur=
e
>>>>>>> that you recommend I do to triage the situation?
>>>>>>> Thanks,
>>>>>>> -Garrett
>>>>>>>
>>>>>>> # uname -a
>>>>>>> FreeBSD bayonetta.local 9.0-CURRENT FreeBSD 9.0-CURRENT #1 r20617=
3M:
>>>>>>> Sun Apr  4 19:54:22 PDT 2010
>>>>>>> root@bayonetta.local:/usr/obj/usr/src/sys/BAYONETTA  amd64
>>>>>>> # pciconf -lv | grep -A 4 emu
>>>>>>> emu10kx0@pci0:8:0:0:    class=3D0x040100 card=3D0x10211102 chip=3D=
0x00081102
>>>>>>> rev=3D0x00 hdr=3D0x00
>>>>>>>    vendor     =3D 'Creative Technology LTD.'
>>>>>>>    device     =3D 'sound blaster Audigy 2 (ca0108)'
>>>>>>>    class      =3D multimedia
>>>>>>>    subclass   =3D audio
>>>>>>> # dmesg | grep 'irq 16'
>>>>>>> uhci0: <Intel 82801JI (ICH10) USB controller USB-D> port 0xa800-0=
xa81f
>>>>>>> irq 16 at device 26.0 on pci0
>>>>>>> pcib7: <ACPI PCI-PCI bridge> irq 16 at device 28.1 on pci0
>>>>>>> emu10kx0: <Creative Audigy 4 [SB0610]> port 0xec00-0xec3f irq 16 =
at
>>>>>>> device 0.0 on pci8
>>>>>>> # dmesg | grep 'pcm'
>>>>>>> pcm0: <EMU10Kx DSP front PCM interface> on emu10kx0
>>>>>>> pcm0: <SigmaTel STAC9750/51 AC97 Codec>
>>>>>>> pcm1: <EMU10Kx DSP rear PCM interface> on emu10kx0
>>>>>>> pcm2: <EMU10Kx DSP center PCM interface> on emu10kx0
>>>>>>> pcm3: <EMU10Kx DSP subwoofer PCM interface> on emu10kx0
>>>>>>> pcm4: <EMU10Kx DSP side PCM interface> on emu10kx0
>>>>>>>
>>>>>>>            =20
>>>>>>>              =20
>>>>>> Some more information:
>>>>>>
>>>>>> 1. snd_emu10kx and sound are both modules loaded on boot, along wi=
th
>>>>>> if_re, linux, and nvidia.
>>>>>> 2. Disabling nvidia -> no change.
>>>>>> 3. Disabling acpi -> unbootable system because many drivers can't =
map
>>>>>> interrupts without it (can't test unless I isolate the drivers and=

>>>>>> enable them one by one -- something I'll try later on).
>>>>>>
>>>>>> I'm at a loss right now... my hunch is that it's potentially a bad=

>>>>>> interaction between the snd_emu10kx driver and another driver on t=
he
>>>>>> same PCI bus (which is just the ACPI and uhci drivers), but I can'=
t
>>>>>> test these claims. There are other funky things about my system th=
at
>>>>>> have changed over the past couple of kernel versions, like front U=
SB
>>>>>> ports could charge my iPhone, and now they don't... and the fact t=
hat
>>>>>> ACPI blanking via nvidia now works again... so something may have
>>>>>> changed on the backend, but I'm not 100% sure on what I should iso=
late
>>>>>> as the root cause, yet.
>>>>>>
>>>>>>          =20
>>>>>>            =20
>>>>> Grr... it's `healed' itself again. I'll watch out for potential
>>>>> catalysts to the issue in the future.
>>>>>
>>>>>        =20
>>>>>          =20
>>>>     Ok. Damn issue came back and here's what happened. Rebooted
>>>> several times with the same kernel and slight modifications, loading=

>>>> and unloading snd_emu10kx and sound, testing out snd_emu10k1, and no=

>>>> dice. The buzz was bad and it was driving me insane. Again, line-in
>>>> functioned just fine, so I didn't know what the heck was going. I wa=
s
>>>> getting desperate, so I finally broke down and booted the Gentoo Lin=
ux
>>>> livecd. PCM worked just fine. Then I got irritated enough and finall=
y
>>>> just built the module and the sound support directly into the kernel=

>>>> and everything is hunky dorey again. Does anyone have a stab in the
>>>> dark as to what's going on? Is it a potential bus or interrupt
>>>> conflict / race condition that gets alleviated when support is naile=
d
>>>> into the kernel? Or are other folks as stumped as I am, s.t. I shoul=
d
>>>> just try emailing current@ instead to see if someone maybe knows
>>>> what's going on there :(...?
>>>> Thanks,
>>>> -Garrett
>>>>      =20
>>>>        =20
>>> I have the same problem.
>>> I'll try compiling the driver in the kernel.
>>>    =20
>>>      =20
>>     FWIW I've compiled the driver into the kernel for several
>> iterations now and it works like a champ, so there's something with
>> the sound subsystem that isn't jiving properly when loading from
>> modules...
>> HTH,
>> -Garrett
>>  =20
>>    =20
> Thanks for the info.
> I've noticed that when I load the kernel module at startup (by adding i=
t
> to loader.conf) chances of it working improve.
> If I load it afterwards, the nice huff puff sounds come out of my
> speaker again.
> Compiling the new and improved kernel today.
> Thanks for your help.
> Greetz,
> Mark
>
>  =20
I compiled the emu10kx driver into the kernel.
That seemed to work, but now the hissing and buzzing is back.
I really don't know what is going on anymore..
Any thoughts?


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