From mboxrd@z Thu Jan  1 00:00:00 1970
From: Takashi Iwai <tiwai@suse.de>
Subject: Re: maestro3 driver hangs dell laptop
Date: Thu, 07 Aug 2003 16:31:17 +0200
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To: juan <jcb@niluge.net>
Cc: alsa-devel@lists.sourceforge.net
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At Thu, 7 Aug 2003 02:04:35 +0200,
juan wrote:
> 
> On Tuesday 05 August, 2003 ? 04:12:22PM +0200, Takashi Iwai wrote:
> > At Tue, 5 Aug 2003 16:08:27 +0200,
> > 
> > do you see the LED blinking?
> > if yes, you could see a last kernel dieing message in the log terminal
> > (often alt+F10 in linux console).  try to switch to that one quickly
> > after loading the module, and wait for the death.  if sysrq is enabled
> > in the kernel, you can see even the backtrace via alt+sysrq+P.
> 
> what i do when i want to load the faulty maestro3 is boot with
> init=/bin/sh ro , so i really have only one console.
> 
> when the machine is frozen, nothing works not even sys req keys

well, then it's difficult to debug...

my wild guess is that a pending irq is issued which is not processed
nor ack'ed by snd-maestro3's interrupt handler.  or, possibly, a wrong
set-up of GPIOs.

but in both cases, i have no idea what can cause after two seconds,
not immediately after the loading of the module.
are other modules (e.g. network, etc) share the same irq?


Takashi


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