RE: [iPAQ] sound problems

Hello Carl;

> Under Linux, the audio has problems on both devices:
>
> 1) On one device, the volume is always at the maximum and
> there is some noise. The noise occurs during loud portions
> of audio, so this may just be an artifact from the mixer
> being stuck at maximum volume.
>
> I'm not sure why the mixer is not working on my iPAQs. From what I've
> heard on the list, it works great for others.
>
> 2) With the second iPAQ, originally the audio behaved just as
> the one I described above. Then, one day I powered it on
> and was greeted with some horrifically loud noise from the
> speaker. It would just scream at me as long as it was
> on. The noise was loud enough to render the iPAQ useless
> unless a speaker cord was plugged in with the speakers
> turned off. (I'll probably clip the connector off of a pair
> of headphones just to keep the thing quiet.) The noise was
> sometimes softer but would get loud again with CPU usage.
>
> This behavior disappeared after a while, but then came back
> again. (Each change was probably after a cold boot).
>
> Today I tried reinstalling WindowsCE on this machine, (this
> worked just fine by the way, so you can increment the
> success count), and the audio works just fine there.

incremented.

>
> Has anyone else witnessed this behavior of the screaming noise? The
> fact that it has disappeared and reappeared suggests to me that some
> register is coming up with a random value. Any guesses? Is there any
> probing I could do to give more useful debugging information?

I agree with you. I think that somebody needs to read the specs and compare
them to the code to be certain that all of the registers are initialized to
some resonalbe value. Do you have time to do this???

Best Regards,

--George

George France, france@crl.dec.com
Cambridge Research Laboratory, Compaq Computer Corporation
One Cambridgecenter MS: CRL
Cambridge, MA 02142 USA
Phone: (617) 551-7665
FAX: (617) 551-7650
 
 
Received on Mon Sep 11 14:54:46 2000