Re: audio problem ...

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Patrik Gfeller wrote:
> Hi all,
>
> ... I need a little help/advice, as programming & especially the linux kernel
> is new ground to me. Well - I´ve managed to configure the kernel
> K2-4-19-rmk6-pxa1-hh37 & to x-compile it for my iPAQ 3870. With make xconfig
> I´ve enabled all the kernel hacking options (except spinlock & waitqueue) in
> the hope the sound modules will become verbouse ...
>
> The size of the so compiled modules increase significantly (h3600-uda1341 from
> 7576 to 154352 Bytes) and sound works with those new modules.
> But dmesg nor /var/log/messages (if I start syslogd) provide any information
> what is happening in those modules.
>
> My questions therefore are:
> - is there something else I´ve to do to activate the debug
> - where can I grap those messages
>
> any advice and/or literary/www references are very welcome.

Are you talking about the OSS or alsa modules? We've repeatly stated
that we want to dump the OSS ones (see the archives and familiar
roadmaps and the wiki).

regards,

Koen

>
> with kind regards,
> Patrik
>
> On Thursday 08 September 2005 18.04, Patrik Gfeller wrote:
>
>>Hi Paul (et all),
>>
>>it seems that iPAQ-3870 is equipped with a philips uda1341 sound chip.
>>Therefore sa1100-audio, uda1341 & h3600-uda1341 modules are involved ... I
>>was able to compile/build them myself (with the click/pop problem).
>>
>>Now I´ll try to understand this printk thing - & how to build them with the
>>debug stuff enable ... maybe this will throw some more light on the issue.
>>
>>with kind regards,
>>Patrik
>>
>>On Tuesday 30 August 2005 03.39, Paul Eggleton wrote:
>>
>>>Hi Patrik,
>>>
>>>
>>>>The main symptoms are clicks when opening & closing /dev/dsp. As I
>>>>listen to e-books with opie-reader & flite I've those clicks after
>>>>every sentence (there's a work around - but it's still anoying).
>>>
>>>Yes I agree this is very annoying. There are other problems too - on the
>>>h3800 the audio device does not always work after resume, either. But
>>>that's a separate issue.
>>>
>>>
>>>>Well - I decided to try to fix this, but I've to confess that I'll need
>>>>some help/tips.
>>>>As the bug was not present in 0.7.2 I thought with diff'ing some driver
>>>>source files I should find the track - but I was wrong.
>>>>Bugzilla #722 has the same symptoms - but I don't know if 39xx uses the
>>>>same driver as the 38xx family.
>>>
>>>It doesn't, they have different sound chips. I can't recall how it works
>>>on h3800, but the h3900 uses a uda1380.
>>>
>>>
>>>>What is "soft-start" - & where can it be configured (Google was not
>>>>able to answer ...)?
>>>
>>>Soft-start I believe means ramping the volume up and down rather than
>>>just turning the output on/off. I imagine you'd have to do it quite
>>>quickly so that it's not noticable. At this stage I don't believe the
>>>driver supports this so you would have to modify it. I can't imagine why
>>>this is more of a problem now than it was before, though.
>>>
>>>Cheers,
>>>Paul
>>
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>
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Received on Fri Sep 09 2005 - 08:47:33 EDT