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Date:      Tue, 21 Aug 2001 19:53:21 +0300
From:      Maxim Sobolev <sobomax@FreeBSD.org>
To:        John Baldwin <jhb@FreeBSD.org>, current@FreeBSD.org, sos@freebsd.dk, grasshacker@over-yonder.net
Subject:   Re: Sound broken on -current again...
Message-ID:  <3B829201.5C03E2BE@FreeBSD.org>
References:  <XFMail.010820110132.jhb@FreeBSD.org> <3B82015A.BEEE9382@FreeBSD.org>

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Maxim Sobolev wrote:

> John Baldwin wrote:
>
> > > The same is here (OPL3-SA driver on Toshiba Satellite Pro 445CDX notebook).
> > > I found that after reverting the following deltas (jhb's 10 August commit)
> > > sound starts working again:
> >
> > That's a rather large commit.  Is this the ast() fixup?  Is the process that
> > has the sound device open hung?  Is it stuck in a wait channel?  If so, can you
> > do a ps and find the wait channel?  Is it chewing up large amounts of CPU time?
> > Has it exited with a signal?
>
> Somebody tracked it down to kern_synch.c,v 1.154 and I'm confirming that reverting
> this delta indeed fixes the problem. The process in question hangs and doesn't
> respond to any signals (SIGKILL included). Following is the relevant piece of `ps
> axl' output:
>
>   UID   PID  PPID CPU PRI NI   VSZ  RSS WCHAN  STAT  TT       TIME COMMAND
>     0   275   267   0  -8  0 41496  212 -      R+    v0    0:00,74 madplay /cdr
>
> Please note that even though madplay above is in the `RUN' state it doesn't consume
> any CPU time.
>
> Please let me know if any additional information would be necessary.

FYI: the same problem affects another my -current machine with sb16 card, with exactly
the same symptoms, i.e. I hear 0.5 second or so of audio, then it halts and process
hangs in the RUN state not responding to signals.

-Maxim


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