Message-Id: <200307010041.h610f6jn016310@turing-police.cc.vt.edu>
To: john stultz <johnstul@us.ibm.com>
Cc: lkml <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@digeo.com>
Subject: Re: 2.5.73-mm2 - odd audio problem, bad intel8x0/ac97 clocking. 
In-Reply-To: Your message of "Mon, 30 Jun 2003 17:25:48 PDT."
             <1057019147.28319.367.camel@w-jstultz2.beaverton.ibm.com> 
From: Valdis.Kletnieks@vt.edu
References: <200306282131.h5SLVjGk001833@turing-police.cc.vt.edu>
            <1057019147.28319.367.camel@w-jstultz2.beaverton.ibm.com>
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Date: Mon, 30 Jun 2003 20:41:06 -0400
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On Mon, 30 Jun 2003 17:25:48 PDT, john stultz said:
> On Sat, 2003-06-28 at 14:31, Valdis.Kletnieks@vt.edu wrote:
> > 2.5.73-mm1 is fine.
> > 
> > This is *not* the "clock runs really really fas"t issue - I left -mm2 runni
ng overnight and
> > in some 8 hours the system clock only drifted a few seconds versus wall clo
ck (and it's
> > possible it was off a few seconds when it booted, as it didn't get an NTP s
ync at boot).
> > 
> > Audio plays "too fast" - a 4 minute .ogg goes through in about 3:40, soundi
ng a bit
> > high-pitched in the process.
> 
> > Any ideas?
> 
> Hrmmm. Are you seeing something like:
> 
> Loosing too many ticks!
> TSC cannot be used as a timesource. (Are you running with SpeedStep?)
> Falling back to a sane timesource.

Nope, it's a pretty clear bug in the Speedstep code leaving loops_per_jiffies bogus.

I posted a follow-up note explaining in more detail...

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