i810_audio support

i810_audio support

[Oleg Amiton]

Hello!

I've just tried to use this sound card (embedded on motherboard) and
got the much of crackling and noise with proper sound.
Is this problem known and fixed already?

modprobe'ing of i810_audio.o and ac97_codec results here:

-- cut --
i810: Intel ICH2 found at IO 0xe000 and 0xdc00, IRQ 9
i810_audio: Audio Controller supports 6 channels.
ac97_codec: AC97 Audio codec, id: 0x8384:0x7600 (SigmaTel STAC????)
i810_audio: only 48Khz playback available.
i810_audio: AC'97 codec 0 Unable to map surround DAC's (or DAC's not present), total channels = 2
-- end --

why last two lines appeared?

Re: i810_audio support

[Alan Cox]

> modprobe'ing of i810_audio.o and ac97_codec results here:
> 
> -- cut --
> i810: Intel ICH2 found at IO 0xe000 and 0xdc00, IRQ 9
> i810_audio: Audio Controller supports 6 channels.

It found you hae a 6 channel capable chipset

> ac97_codec: AC97 Audio codec, id: 0x8384:0x7600 (SigmaTel STAC????)
> i810_audio: only 48Khz playback available.
> i810_audio: AC'97 codec 0 Unable to map surround DAC's (or DAC's not present), total channels = 2

With what appears to be a single stereo only fixed rate AC97 codec

Re: i810_audio support

[Zhang Lin-bo]

I had encountered the same problem with my Fujitsu LBS5582,
and I found out that the crackling was caused by the esound
daemon. For example, if I change the output plugin of xmms
from libesdout.so to libOSS.so, the crackling's gone.
Maybe this is also your case?

--

Re: i810_audio support

[Jason Algol]

>From: Alan Cox <alan@lxorguk.ukuu.org.uk>
>To: fooooobar@hotmail.com (Jason Algol)
>CC: linux-kernel@vger.kernel.org
>Subject: Re: i810_audio support
>Date: Tue, 26 Feb 2002 22:58:28 +0000 (GMT)
>
> > I dont know very much about the workings of sound cards, but the problem 
>is
> > that when playing anything a total crackling in the background that 
>makes
> > the audio almost unusable...a real pity.
>
>There are plenty of funnies in the i810 audio (actually mostly the driver
>just doesn't seem to want to lie down and behave not such the hardware).
>The crackling audio isn't one of the problems seen anywhere.
>

A friend of mine with the same machine ( a tiny p4 1500 based machine ) 
suffers from this also, but they bought a commercial driver ( OSS?, im not 
sure.. ) that fixed the problem, there a couple of mentions of it on 
dejagoo, but no solutions offered.

>What AC97 codec is attached to your card, and also does it help if you
>turn volume levels down a bit and turn all the recording inputs right off ?

This is some of my dmesg info :

Intel 810 + AC97 Audio, version 0.21, 00:53:47 Feb 27 2002
PCI: Found IRQ 10 for device 00:1f.5
PCI: Sharing IRQ 10 with 00:1f.3
PCI: Setting latency timer of device 00:1f.5 to 64
i810: Intel ICH2 found at IO 0xe000 and 0xdc00, IRQ 10
i810_audio: Audio Controller supports 6 channels.
ac97_codec: AC97 Audio codec, id: 0x8384:0x7609 (SigmaTel STAC9721/23)
i810_audio: only 48Khz playback available.
i810_audio: AC'97 codec 0 supports AMAP, total channels = 2
ac97_codec: AC97 Modem codec, id: 0x5349:0x4c22 (Silicon Laboratory Si3036)
i810_audio: timed out waiting for codec 1 analog ready




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Re: i810_audio support

[Alan Cox]

> I dont know very much about the workings of sound cards, but the problem is 
> that when playing anything a total crackling in the background that makes 
> the audio almost unusable...a real pity.

There are plenty of funnies in the i810 audio (actually mostly the driver
just doesn't seem to want to lie down and behave not such the hardware).
The crackling audio isn't one of the problems seen anywhere.

What AC97 codec is attached to your card, and also does it help if you
turn volume levels down a bit and turn all the recording inputs right off ?

i810_audio support

[Jason Algol]

hi guys, and congratulations on another great release (2.4.18) :-)

I have been patiently waiting for support for the i810_audio to be improved, 
it currently works, and it has flawless stability, but the sound quality it 
produces it dreadful. I realise this is no life and death problem, and i 
would imagine a low priority request, but i would really appreciate some 
info on if it is still being maintained / developed.

I am currently running 2.4.18 , but have recently downloaded and tried the 
2.5.5 release, just as a taster, to see if the ALSA integration had fixed my 
problem, no such luck :-(

I have also been watching the changelogs and have downloaded any 
kernel/patch release that even mentions the i810 :-) ( I dont run a 
development kernel, but I have tried them just as a taster :-) )

I dont know very much about the workings of sound cards, but the problem is 
that when playing anything a total crackling in the background that makes 
the audio almost unusable...a real pity.

>From reading the comments at the top of the i810_audio.c code, I think the 
authors have had some difficulty, i guess the hardware is awkward to write 
for or something :-)

I was so looking forward to the 2.5.5 ALSA release, but as it didnt fix my 
problem, does anyone know if there are plans to? or am i better off 
abandoning all hope and getting a new card?

Thanks for any help guys! and keep up the excellent, excellent work your all 
doing!

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