linux-kernel - Re: ACPI errors with 3.7-rc3

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Message-ID: <20121031173336.GA28991@kroah.com>
Date:	Wed, 31 Oct 2012 10:33:36 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	lenb@...nel.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: ACPI errors with 3.7-rc3

On Wed, Oct 31, 2012 at 10:11:21AM +0100, Rafael J. Wysocki wrote:
> Hi Greg,
> 
> On Tuesday, October 30, 2012 06:45:27 PM Greg KH wrote:
> > Hi Len and Rafael,
> > 
> > With 3.7-rc3, I'm seeing a constant stream of these errors in the kernel
> > log for my MacBook Pro:
> > 
> > [30443.430133] ACPI: EC: input buffer is not empty, aborting transaction
> > [30443.430145] ACPI Exception: AE_TIME, Returned by Handler for [EmbeddedControl] (20120913/evregion-501)
> > [30443.430162] ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPCB.EC__.SMB0.SBRW] (Node ffff88045cc64618), AE_TIME (20120913/psparse-536)
> > [30443.430179] ACPI Error: Method parse/execution failed [\_SB_.BAT0.UBST] (Node ffff88045cc64988), AE_TIME (20120913/psparse-536)
> > [30443.430188] ACPI Error: Method parse/execution failed [\_SB_.BAT0._BST] (Node ffff88045cc648c0), AE_TIME (20120913/psparse-536)
> > [30443.430202] ACPI Exception: AE_TIME, Evaluating _BST (20120913/battery-464)
> > 
> > They never showed up before in 3.7-rc2.
> > 
> > Anything I should try out to resolve this?
> 
> Well, there are the following two post-3.6 EC-related commits:
> 
> commit 67bfa9b60bd689601554526d144b21d529f78a09
> Author: Feng Tang <feng.tang@...el.com>
> Date:   Fri Sep 28 15:22:01 2012 +0800
> 
>     ACPI: EC: Add a quirk for CLEVO M720T/M730T laptop
> 
> commit a520d52e99b14ba7db135e916348f12f2a6e09be
> Author: Feng Tang <feng.tang@...el.com>
> Date:   Fri Sep 28 15:22:00 2012 +0800
> 
>     ACPI: EC: Make the GPE storm threshold a module parameter
> 
> Can you please check if reverting the second one helps?

That last one seems like it would be it, if the module parameter got
changed.  And now I can't duplicate it at all, 3.7-rc3 works fine.  Ick,
sorry for the noise, I don't know what happened.  If I see the above
errors again, I'll let you know, and I'll also check the ec module
parameter first to ensure it didn't change from the default of 8.

thanks,

greg k-h
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