maestro3 driver hangs dell laptop

maestro3 driver hangs dell laptop

[juan loco]

i have a dell c600 laptop running kernel 2.4.21

when i load the maestro driver , my system hangs 2 seconds later.

i tried 2.4.20 / 2.6.0-test , same problem

i use alsa version 0.9.5 

what informations should i provide to help me trace the freeze ?


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Re: maestro3 driver hangs dell laptop

[Takashi Iwai]

At Sun, 3 Aug 2003 23:02:37 +0200,
juan loco wrote:
> 
> i have a dell c600 laptop running kernel 2.4.21
> 
> when i load the maestro driver , my system hangs 2 seconds later.
> 
> i tried 2.4.20 / 2.6.0-test , same problem

is ACPI enabled?


Takashi


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Re: maestro3 driver hangs dell laptop

[Takashi Iwai]

At Tue, 5 Aug 2003 16:08:27 +0200,
juan wrote:
> 
> On Tuesday 05 August, 2003 ? 03:58:34PM +0200, Takashi Iwai wrote:
> > At Sun, 3 Aug 2003 23:02:37 +0200,
> > juan loco wrote:
> > > 
> > > i have a dell c600 laptop running kernel 2.4.21
> > > 
> > > when i load the maestro driver , my system hangs 2 seconds later.
> > > 
> > > i tried 2.4.20 / 2.6.0-test , same problem
> > 
> > is ACPI enabled?
> > 
> i tried with/without preempt and acpi , same hardware freeze
> how can i trace the problem ? it's hard since the machines dies :(

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.


Takashi


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Re: maestro3 driver hangs dell laptop

[juan]

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


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Re: maestro3 driver hangs dell laptop

[juan]

On Tuesday 05 August, 2003 ? 04:12:22PM +0200, Takashi Iwai wrote:
> do you see the LED blinking?
> if yes, you could see a last kernel dieing message in the log terminal

no the leds stay on.


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Re: maestro3 driver hangs dell laptop

[Takashi Iwai]

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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Re: maestro3 driver hangs dell laptop

[juan]

On Thursday 07 August, 2003 ? 04:31:17PM +0200, Takashi Iwai wrote:
> 
> 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.

what method do you propose to locate the bug ?
someone suggested to put prinks in the maestro functions...
 
> 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?

no the card has the irq 5 for itself


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Re: maestro3 driver hangs dell laptop

[Takashi Iwai]

At Thu, 7 Aug 2003 17:19:03 +0200,
juan wrote:
> 
> On Thursday 07 August, 2003 ? 04:31:17PM +0200, Takashi Iwai wrote:
> > 
> > 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.
> 
> what method do you propose to locate the bug ?
> someone suggested to put prinks in the maestro functions...

yep, it always works, but you'll need anyway two vt's to see the
kernel messages in real-time.


Takashi


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