From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Takashi Iwai <tiwai@suse.de>
Cc: Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: [BUG] 2.6.10-rc3 snd-powermac crash
Date: Mon, 20 Dec 2004 17:36:36 +0100 [thread overview]
Message-ID: <1103560596.9065.10.camel@gaston> (raw)
In-Reply-To: <s5hr7lluei7.wl@alsa2.suse.de>
On Mon, 2004-12-20 at 17:21 +0100, Takashi Iwai wrote:
> At Sat, 18 Dec 2004 18:33:58 +0100,
> Benjamin Herrenschmidt wrote:
> >
> > On Sat, 2004-12-18 at 18:07 +0100, Benjamin Herrenschmidt wrote:
> > > Hi Takashi !
> > >
> > > I get that regulary with latest kernel when using Alsa. Can't tell if it's new
> > > as I used dmasound so far, just wanted to give Alsa a try...
> >
> > It seems to be related to oss emulation I'd say ... it's triggered by
> > gtkpbbuttons volume control keys, which will open/ioctl/write/close the
> > device very quicky (changing volume & outputing a beep)
>
> So, it's not reproducible when you do playback normally?
> Can you get /proc/asound/card0/pcm0p/sub0/hw_params during playback?
No, it's not something that happens during normal playback, but
occasionally when tweaking the volume ... I suspect a fast
open/ioctl/close sequence or something like that... weird.
> > Maybe a race ? This is a laptop, so UP, no PREEMPT.
>
> Well, the volume and PCM shouldn't be racy. I'd first suspect another
> bug in PCM OSS emulation code...
>
> Could you compile with CONFIG_SND_DEBUG=y and see whether it catches
> anything?
Ok.
Ben.
next prev parent reply other threads:[~2004-12-20 16:36 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-18 17:07 [BUG] 2.6.10-rc3 snd-powermac crash Benjamin Herrenschmidt
2004-12-18 17:33 ` Benjamin Herrenschmidt
2004-12-20 16:21 ` Takashi Iwai
2004-12-20 16:36 ` Benjamin Herrenschmidt [this message]
2004-12-20 16:55 ` Benjamin Herrenschmidt
2004-12-20 18:30 ` Takashi Iwai
2004-12-21 6:43 ` marvin24
2004-12-21 7:53 ` Soeren Sonnenburg
2004-12-31 15:23 ` Andreas Schwab
2005-01-05 20:06 ` Soeren Sonnenburg
2005-01-07 12:00 ` Takashi Iwai
2005-01-07 13:00 ` Soeren Sonnenburg
2005-01-07 13:30 ` Andreas Schwab
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