From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans de Goede Subject: Re: ACPI errors on Dell Latitude E5430 Date: Wed, 03 Oct 2012 12:43:11 +0200 Message-ID: <506C16BF.70100@redhat.com> References: <5069E332.9060109@redhat.com> <506AB25D.7000900@hundeboll.net> <506ACCA1.6030908@redhat.com> <506BDCE1.4050007@hundeboll.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mx1.redhat.com ([209.132.183.28]:36956 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751187Ab2JCKlw (ORCPT ); Wed, 3 Oct 2012 06:41:52 -0400 In-Reply-To: <506BDCE1.4050007@hundeboll.net> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: =?UTF-8?B?TWFydGluIEh1bmRlYsO4bGw=?= Cc: linux-acpi , Matthew Garrett Hi, On 10/03/2012 08:36 AM, Martin Hundeb=C3=B8ll wrote: > On 2012-10-02 13:14, Hans de Goede wrote: >> Hi, >> >> On 10/02/2012 11:22 AM, Martin Hundeb=C3=B8ll wrote: >>> Hi Hans, >>> >>> On 2012-10-01 20:38, Hans de Goede wrote: >>>> 2) Even with a 3.6 which shows the problematic behavior, I can >>>> make things work by adding acpi.ec_delay=3D2000 to the kernel cmdl= ine, >>>> the debug traces show that the EC takes it sweet time to respond >>>> (sometime close to 2 seconds) but it does eventually respond in al= l >>>> cases I've seen sofar. >>>> >>>> This also seems to fix a sporadic occurence of: >>>> "ACPI: EC: input buffer is not empty aborting transaction" >>>> Which I'm seeing with 3.5 / 3.6 in a non debug build. >>>> >>>> Martin, can you see if adding that helps you with the E5430 proble= ms >>>> too ? >>> >>> As far as I can tell from the attached dmesg, the errors are gone >>> after setting acpi.ec_delay=3D2000. Thanks a lot! >>> >>> The only remaining issue is the fan control, which works as expecte= d >>> initially, but then fails to spin down after a few minutes. >> >> Hmm, I'm seeing the same thing, but only when charging my battery, a= nd >> then indeed >> does not spin down completely, but it does step down from vacuum cle= aner >> mode to >> something more pleasant after the machine was loaded for a while and >> returns back >> to idle. >> >> Also it spins up to its slowest speed by jut using the charger, so I >> think it is >> just bleeding of heat caused by the charging hardware in this case (= for >> me). > > For the record, my fan keeps spinning also when on battery (as report= ed by i8k/sensors): > > i8k-virtual-0 > Adapter: Virtual device > Right Fan: 84000 RPM > CPU: +39.0C > > This is not a total show-stopper, but nevertheless quite annoying whe= n the home-office is shared with the bedroom :) Ah right, you added acpi_enforce_resources=3Dlax to get i8k to work, ri= ght, hint: DO NOT DO THAT! See: http://lm-sensors.org/wiki/FAQ/Chapter3#Mysensorshavestoppedworkin= ginkernel2.6.31 So please try again without any custom kernel options, other then acpi.ec_delay=3D2000 Regards, Hans -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html