linux-kernel - Re: 2.6.19-rc5 nasty ACPI regression, AE

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Date:	Thu, 16 Nov 2006 08:03:03 -0800
From:	David Brownell <david-b@...bell.net>
To:	Alexey Starikovskiy <alexey.y.starikovskiy@...ux.intel.com>
Cc:	Len Brown <lenb@...nel.org>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	linux-acpi@...r.kernel.org
Subject: Re: 2.6.19-rc5 nasty ACPI regression, AE_TIME errors

On Thursday 16 November 2006 7:41 am, Alexey Starikovskiy wrote:
> Looks like either EC GPE or whole ACPI irq got disabled... Could you 
> check that ACPI interrupts still arrive after
> you notice AE_TIME?

If I unplug AC, /proc/interrrupts reports 2 IRQs going to ACPI.
Then on replug, it reports 10-12 IRQs going to ACPI.


> Also, may be attached patch will help?

I'l give it a try next time I can reboot (presumably by this PM).

- Dave


> 
> Regards,
>     Alex.
> 
> David Brownell wrote:
> > On Wednesday 15 November 2006 1:56 pm, David Brownell wrote:
> >   
> >> On Wednesday 15 November 2006 6:48 am, Alexey Starikovskiy wrote:
> >>     
> >>> ec1.patch
> >>>
> >>>
> >>> Always enable GPE after return from notify handler.
> >>>
> >>> From:  Alexey Starikovskiy <alexey.y.starikovskiy@...ux.intel.com>
> >>>
> >>>
> >>> ---
> >>>       
> >> Yes, this seems to resolve the regression as well as Len's ec_intr=0 boot param.
> >>     
> >
> > Whoops, I spoke too soon.  It does get rid of SOME of the AE_TIME errors.  But
> > the system is still confused about whether or not the AC is connected, and
> > whether the battery is charging or not; and the CPU is still relatively hot.
> > Even with this patch I later got:
> >
> > ACPI Exception (evregion-0424): AE_TIME, Returned by Handler for [EmbeddedControl] [20060707]
> > ACPI Exception (dswexec-0458): AE_TIME, While resolving operands for [OpcodeName unavailable] [2006070
> > 7]
> > ACPI Error (psparse-0537): Method parse/execution failed [\_TZ_.THRM._TMP] (Node ffff810002032d10), AE
> > _TIME
> >
> > In short, better but evidently not yet good enough...
> >
> > - Dave
> >
> >
> >
> >   
> >> IMO this should get merged into 2.6.19 ASAP ...
> >>
> >>
> >>     
> >>>  drivers/acpi/ec.c |    2 --
> >>>  1 files changed, 0 insertions(+), 2 deletions(-)
> >>>
> >>> diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
> >>> index e6d4b08..937eafc 100644
> >>> --- a/drivers/acpi/ec.c
> >>> +++ b/drivers/acpi/ec.c
> >>> @@ -465,8 +465,6 @@ static u32 acpi_ec_gpe_handler(void *dat
> >>>  
> >>>         if (value & ACPI_EC_FLAG_SCI) {
> >>>                 status = acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query, ec);
> >>> -               return status == AE_OK ?
> >>> -                   ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED;
> >>>         }
> >>>         acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_ISR);
> >>>         return status == AE_OK ?
> >>>       
> 
> 
-
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