Speaker static, vanishes with APIC

Speaker static, vanishes with APIC

[Ryan Reich]

This is really trivial and I solved it anyway, but in all incarnations of 2.6 I
have had static coming from my speakers shortly after boot.  It only lasts a few
seconds and sounds as though someone were jiggling the plug in the sound card's
socket.  It only happens right after boot.  Since I enabled Local APIC and
IO-APIC it hasn't happened.

Sound card module is snd-intel8x0, and my card is built into my Shuttle AN35N
motherboard.

-- 
Ryan Reich
ryanr@uchicago.edu

Re: Speaker static, vanishes with APIC

[Mark Watts]

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> This is really trivial and I solved it anyway, but in all incarnations of
> 2.6 I have had static coming from my speakers shortly after boot.  It only
> lasts a few seconds and sounds as though someone were jiggling the plug in
> the sound card's socket.  It only happens right after boot.  Since I
> enabled Local APIC and IO-APIC it hasn't happened.

Did you get a similar noise when shutting down?

My other half has an AMD motherboard with onboard Via sound which gives a 
burst of static when KDE 3.1 starts and another when it shuts down. All other 
sound is fine. (Kernel 2.4.22)

APIC's are disabled on this board...

>
> Sound card module is snd-intel8x0, and my card is built into my Shuttle
> AN35N motherboard.

- -- 
Mark Watts
Senior Systems Engineer
QinetiQ TIM
St Andrews Road, Malvern
GPG Public Key ID: 455420ED

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Re: Speaker static, vanishes with APIC

[Mark Watts]

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> On Mon, 16 Feb 2004, Mark Watts wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > > This is really trivial and I solved it anyway, but in all incarnations
> > > of 2.6 I have had static coming from my speakers shortly after boot. 
> > > It only lasts a few seconds and sounds as though someone were jiggling
> > > the plug in the sound card's socket.  It only happens right after boot.
> > >  Since I enabled Local APIC and IO-APIC it hasn't happened.
> >
> > Did you get a similar noise when shutting down?
> >
> > My other half has an AMD motherboard with onboard Via sound which gives a
> > burst of static when KDE 3.1 starts and another when it shuts down. All
> > other sound is fine. (Kernel 2.4.22)
> >
> > APIC's are disabled on this board...
>
> No, just when starting up.  It doesn't even need to be in KDE; in fact,
> I've never noticed it in KDE since I start in text mode and check my mail
> before starting X (you know how it's impossible to hold off checking mail).
>  Your problem sounds different since it's in 2.4, also, and I never saw
> this in 2.4.
>
> However, KDE and sound don't always agree, in my experience.  They can't
> even get their own sounds right sometimes; when shutting it down their
> "shutdown" tune is always cut off as the aRts server exits before it
> finishes playing the sound.  This, of course, is not static.

Ah well - one more thing to rule out :)

Cheers,

Mark.

- -- 
Mark Watts
Senior Systems Engineer
QinetiQ TIM
St Andrews Road, Malvern
GPG Public Key ID: 455420ED

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Re: Speaker static, vanishes with APIC

[Ryan Reich]

On Mon, 16 Feb 2004, Mark Watts wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
>
> > This is really trivial and I solved it anyway, but in all incarnations of
> > 2.6 I have had static coming from my speakers shortly after boot.  It only
> > lasts a few seconds and sounds as though someone were jiggling the plug in
> > the sound card's socket.  It only happens right after boot.  Since I
> > enabled Local APIC and IO-APIC it hasn't happened.
>
> Did you get a similar noise when shutting down?
>
> My other half has an AMD motherboard with onboard Via sound which gives a
> burst of static when KDE 3.1 starts and another when it shuts down. All other
> sound is fine. (Kernel 2.4.22)
>
> APIC's are disabled on this board...

No, just when starting up.  It doesn't even need to be in KDE; in fact, I've
never noticed it in KDE since I start in text mode and check my mail before
starting X (you know how it's impossible to hold off checking mail).  Your
problem sounds different since it's in 2.4, also, and I never saw this in 2.4.

However, KDE and sound don't always agree, in my experience.  They can't even
get their own sounds right sometimes; when shutting it down their "shutdown"
tune is always cut off as the aRts server exits before it finishes playing the
sound.  This, of course, is not static.

-- 
Ryan Reich
ryanr@uchicago.edu

Re: Speaker static, vanishes with APIC

[Ryan Reich]

On Sun, 15 Feb 2004, Ryan Reich wrote:

> This is really trivial and I solved it anyway, but in all incarnations of 2.6 I
> have had static coming from my speakers shortly after boot.  It only lasts a few
> seconds and sounds as though someone were jiggling the plug in the sound card's
> socket.  It only happens right after boot.  Since I enabled Local APIC and
> IO-APIC it hasn't happened.
>
> Sound card module is snd-intel8x0, and my card is built into my Shuttle AN35N
> motherboard.

Spoke too soon, it's still there.  Though it definitely wasn't there last time I
booted.

-- 
Ryan Reich
ryanr@uchicago.edu