NM256: Sound playback pointer invalid!

NM256: Sound playback pointer invalid!

[Orion Poplawski]

One of my users is seeing this message from the nm256_audio driver:

NM256: Sound playback pointer invalid!

along with screeching noise coming from the speaker.

Running redhat kernels 2.4.9-31custom and 2.4.18-19.7.x can show the 
same problem.

I did a google search and found a similar post about this problem last 
June, but no solution.  Any ideas?

Thank You,

  Orion Poplawski

RE: NM256: Sound playback pointer invalid!

[Drew Myers]

I'm running 2.4.18 and have the same prob.  Just downloaded the 2.4.17 
source to diff the nm256.h, and they're the same.

I'm following with interest.


Drew

--
There's only one thing in life that's certain: it will end.

NM256: Sound playback pointer invalid!

[DevilKin]

Hello,

Since upgrading to 2.4.18 (tested with later kernels too, running 
2.4.19-pre10-ac2 right now) I have the following problem: every time my 
soundchip is activated for the first time, it makes a horrible screetching 
noise. Just plain horrible. After that, playback is perfect.

In the logs i get:

NM256: Sound playback pointer invalid!

I've looked on the net for some info, but I haven't been able to find anything 
that really cures this problem.

Anything else I can try?

Thanks!

DK

-- 
You worry too much about your job.  Stop it.  You're not paid enough to
worry.

Re: NM256: Sound playback pointer invalid!

[Andrew Rodland]

On Thu, 13 Jun 2002 11:19:26 +0200
DevilKin <devilkin-lkml@blindguardian.org> wrote:

I have the identical symptom, I haven't come up with a cure.
Giving it a thought now, though, why not just sox out a very short (and
silent, if you want) wave file at boot? That way at least the first
thing played won't be something you really wanted to hear.

I've also noticed that while this is going on, whatever app is trying to
play sound generally gets bogged down, probably because the "noise"
plays about half as fast as the proper sound.

I've tried ALSA, but it always locks up after "Found IRQ X for pci
Y.Z:T" or whatever it is, for reasons unknown to me, even after adding
much printk. If anyone really cares, I might recreate my debug output.

Oddly enough, I'm also running 2.4.19-pre10-ac2+preempt+hobbs (the last
being a tiny hack to the mtrr code, and not related to the problem), and
I was running 2.4.18 at the time I got this laptop.

Are you saying that older kernels work properly? I've got a copy of
2.4.17 around here somewhere, I might look at the diffs...

Anyway, thanks for forcing me to think about it
--hobbs

> Hello,
> 
> Since upgrading to 2.4.18 (tested with later kernels too, running 
> 2.4.19-pre10-ac2 right now) I have the following problem: every time
> my soundchip is activated for the first time, it makes a horrible
> screetching noise. Just plain horrible. After that, playback is
> perfect.
> 
> In the logs i get:
> 
> NM256: Sound playback pointer invalid!
> 
> I've looked on the net for some info, but I haven't been able to find
> anything that really cures this problem.
> 
> Anything else I can try?
> 
> Thanks!
> 
> DK
> 
> -- 
> You worry too much about your job.  Stop it.  You're not paid enough
> to worry.
> 
> -
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Re: NM256: Sound playback pointer invalid!

[Alan Cox]

> Since upgrading to 2.4.18 (tested with later kernels too, running 
> 2.4.19-pre10-ac2 right now) I have the following problem: every time my 
> soundchip is activated for the first time, it makes a horrible screetching 
> noise. Just plain horrible. After that, playback is perfect.

I'll follow this up later when I get some time - I have some ideas