linux-kernel - Re: Mickey mouse voices on snd-intel8x0

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Date:	Sun, 13 Jul 2008 08:39:33 +0200
From:	Zoltan Boszormenyi <zboszor@...aweb.hu>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Mickey mouse voices on snd-intel8x0

Takashi Iwai írta:
> At Sat, 28 Jun 2008 19:42:15 +0200,
> Zoltan Boszormenyi wrote:
>   
>> Hi,
>>
>> I have a Compaq Deskpro EN with PIII/866 recycled as a thin client.
>> The problem was that sound on the thin client was played faster than it
>> should.
>> I have Fedora 9/x86-64 on the main machine, so the thin client is LTSP5
>> that comes with F9.
>> I tried everything (acpi=off, etc) but the strange voice didn't get better.
>> I discovered this in the dmesg:
>>     
>
> Did this problem exist on the earlier kernel?
>   

IIRC, yes.
When I have set up LTSP5, both the client and the host had a 2.6.24.x
kernel.
Don't ask the exact version, though.

>> intel8x0_measure_ac97_clock: measured 50895 usecs
>> intel8x0: measured clock 78 rejected
>>     
>
> This value is way too small than normal.  It means that either the
> clocking or the calculation of the position in
> intel8x0_measure_ac97_clock() is wrong.  Could you check what is the
> value if ichdev->position in that function?
>   

How? Is there a module option for such debug info?

>> intel8x0: clocking to 48000
>>
>> I looked at the current kernel sources and found the solution for that.
>> I had to provide this for the thin client in
>> /opt/ltsp/i386/etc/modprobe.conf :
>>
>> options snd-intel8x0 ac97_clock=44100
>>     
>
> Usually it's a bit slower than that.  See
> Documentation/sound/alsa/ALSA-Configuration.txt.
>   

Thanks.

>
> thanks,
>
> Takashi
>
>   

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