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

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Message-Id: <200611150248.12578.len.brown@intel.com>
Date:	Wed, 15 Nov 2006 02:48:12 -0500
From:	Len Brown <len.brown@...el.com>
To:	David Brownell <david-b@...bell.net>
Cc:	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 Wednesday 15 November 2006 02:03, David Brownell wrote:
> dmesg reports to me stuff like
> 
> ACPI Exception (evregion-0424): AE_TIME, Returned by Handler for [EmbeddedControl] [20060707]
> ACPI Exception (dswexec-0458): AE_TIME, While resolving operands for [OpcodeName unavailable] [20060707]
> ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.LPC0.BAT1._BIF] (Node ffff8100020368d0), AE_TIME
> ACPI Exception (acpi_battery-0148): AE_TIME, Evaluating _BIF [20060707]
> ACPI: read EC, IB not empty
> ACPI Exception (evregion-0424): AE_TIME, Returned by Handler for [EmbeddedControl] [20060707]
> ACPI Exception (dswexec-0458): AE_TIME, While resolving operands for [OpcodeName unavailable] [20060707]
> ACPI Error (psparse-0537): Method parse/execution failed [\_TZ_.THRM._TMP] (Node ffff810002032d10), AE_TIME

AE_TIME is generally used for timeout situations -- ie didn't get a semaphore within a certain period.

Any change if you boot with "ec_intr=0"?

thanks,
-Len

> It never used to complain at all.  This is an amd64 laptop, and related symptoms
> include
> 
>  - kpowersave not being able to monitor the batter or AC adapter correctly;
>    leading to catastrophes like laptop powering itself off with no warning,
>    loss of work, filesystem needing log recovery, and so forth.
> 
>  - Serious fan action.  Recent kernels seemed to finally be doing sane things
>    so that e.g. just editing text kept the CPU cool ... but now it's on almost
>    all the time, CPU is very hot.
> 
> What's an AE_TIME?
> 
> I'm not quite sure where these problems crept in, but I never saw such stuff with
> 2.6.18 at all.
> 
> - Dave
> 
> -
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