linux-kernel - Re: [Bug #11841] plenty of line "ACPI: EC: non-query interrupt received, switching to interrupt mode" in dmesg

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Message-ID: <r6ljwccagm.fsf@skye.inf.phy.cam.ac.uk>
Date:	26 Oct 2008 03:16:25 +0000
From:	Sanjoy Mahajan <sanjoy@...o.cam.ac.uk>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Francois Valenduc <francois.valenduc@...ablenet.be>
Subject: Re: [Bug #11841] plenty of line "ACPI: EC: non-query interrupt received, switching to interrupt mode" in dmesg

> The following bug entry is on the current list of known regressions
> from 2.6.27.

> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11841
> Subject : plenty of line "ACPI: EC: non-query interrupt received, switching to interrupt mode" in dmesg

I see these messages already with 2.6.27.3:

  # grep non-query /var/log/dmesg
  [    0.205977] ACPI: EC: non-query interrupt received, switching to interrupt mode

There are 9 more occurrences in the current ring buffer:
  # dmesg |grep non-query | wc -l
  9

Each one happens right after waking from S3 sleep, for example:

  [70168.288590] CPU1 is up
  [70168.288594] ACPI: Waking up from system sleep state S3
  [70169.624254] ACPI: EC: non-query interrupt received, switching to interrupt mode

The setup is a TP T60 w/ Intel graphics, wireless (i.e. no taint),
Debian unstable, but with vanilla kernel 2.6.27.3.

-Sanjoy
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