linux-kernel - Re: ACPI: EC: GPE storm detected, disabling EC GPE

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Message-ID: <20080608142106.GD4739@ucw.cz>
Date:	Sun, 8 Jun 2008 16:21:06 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	Alexey Starikovskiy <astarikovskiy@...e.de>
Cc:	Justin Mattock <justinmattock@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-acpi@...r.kernel.org
Subject: Re: ACPI: EC: GPE storm detected, disabling EC GPE

Hi!

On Sat 2008-06-07 23:28:08, Alexey Starikovskiy wrote:
> Justin Mattock wrote:
> >On Sat, Jun 7, 2008 at 6:55 AM, Andrew Morton 

> >This issue just recently started, 2.6.25-rc9 and below 
> >don't give me
> >this message.
> >
> Yes, the problem which we are fighting here is that 
> almost all Acer notebooks come with
> broken EC. It sends interrupts not regarding the fact 
> that we already ACKed it.
> It comes unnoticed on almost all machines (some notice 
> laggy keyboard, because it's the same controller after 
> all and it's busy with sending ACPI interrupts and then 
> providing same status byte over and over), but on some 
> machines keystrokes become missing, which is not 
> tolerable (#9998).

But the acer workaround breaks other machines, right?

So what about

a) use dmi blacklist for acers?

or

b) if EC storm is detected print message telling 'please pass
ec_polled=true if you experience keyboard problems', but do nothing
else?

							Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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