From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexey Starikovskiy Subject: Re: ACPI: EC: GPE storm detected, disabling EC GPE Date: Wed, 11 Jun 2008 14:29:35 +0400 Message-ID: <484FA90F.3010005@gmail.com> References: <20080606235526.783acc83.akpm@linux-foundation.org> <484AE148.6000204@suse.de> <20080608142106.GD4739@ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from gv-out-0910.google.com ([216.239.58.187]:52379 "EHLO gv-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751713AbYFKK3H (ORCPT ); Wed, 11 Jun 2008 06:29:07 -0400 Received: by gv-out-0910.google.com with SMTP id e6so697079gvc.37 for ; Wed, 11 Jun 2008 03:29:05 -0700 (PDT) In-Reply-To: <20080608142106.GD4739@ucw.cz> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Pavel Machek Cc: Alexey Starikovskiy , Justin Mattock , Andrew Morton , "Rafael J. Wysocki" , Linux Kernel Mailing List , linux-acpi@vger.kernel.org Pavel Machek wrote: > 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? > > As I know, the first workaround broke your machine, may be you could check if it is broken now? > So what about > > a) use dmi blacklist for acers? > > It is not only Acers. ASUS eeePC is known to be affected, some Apple notebook too. > or > > b) if EC storm is detected print message telling 'please pass > ec_polled=true if you experience keyboard problems', but do nothing > else? > > There are no reports about broken machines for 2.6.26-rc5 beside #10724, which has same broken controller, sending same amount of stray interrupts. If there will be report from a good machine affected by this workaround then I will certainly go with b) Thanks, Alex.