From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934092Ab0CMJQY (ORCPT ); Sat, 13 Mar 2010 04:16:24 -0500 Received: from fg-out-1718.google.com ([72.14.220.155]:51788 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933358Ab0CMJQV convert rfc822-to-8bit (ORCPT ); Sat, 13 Mar 2010 04:16:21 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=xu26f5l6OwUT6u/dlN+CsGfgCAVGDbDnsREPHzsToz4KeAJrbkHYGjQIX6zZLsH/Pn 0ixff1G++neMhULsYSinvW1e+cfnR6KAh3io6HfFMm2julO1+GhBWoQCiCWSK8M+mTF1 GgHaYc9Ohxi2ytLdL7t7hoe9cJTbt4DJJDMDM= MIME-Version: 1.0 In-Reply-To: References: <71cd59b01003120049n1a9fbbf3qfd37f14f241a7f64@mail.gmail.com> Date: Sat, 13 Mar 2010 10:16:19 +0100 Message-ID: <71cd59b01003130116h4265769v9e1dae95361629ce@mail.gmail.com> Subject: Re: Possible bug in eeepc-laptop.c - EeePC 900 From: Corentin Chary To: Fabio Comolli Cc: ACPI mailing list , Linux Kernel Mailing List , Len Brown Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 12, 2010 at 9:07 PM, Fabio Comolli wrote: > Hi > > On Fri, Mar 12, 2010 at 9:49 AM, Corentin Chary > wrote: >> On Thu, Mar 11, 2010 at 10:28 PM, Fabio Comolli wrote: >>> Hi. >>> >>> On Tue, Mar 9, 2010 at 11:58 PM, Fabio Comolli wrote: >>>> Hi. >>>> I have an EeePC 900 running 2.6.34-rc1. >>>> >>>> If I boot it on AC the cpu runs at full speed, 900MHz; if I boot it on >>>> battery it runs only at 630Mhz. Plugging / unplugging the AC does not >>>> change the cpu frequency. Only a reboot can change the situation. >>>> >>>> I already tried to echo 0 or 1 to the >>>> /sys/devices/platform/eeepc/cpufv file; no effects, even if the file >>>> changes its value. >>>> >>>> This is not a regression from 2.6.33: this behavior is also present in >>>> that version. >>>> >>>> Does this ring any bells? This is really annoying, especially when >>>> trying to watch a movie on battery. Also 3D apps show a 30% >>>> performance drop, as expected. >>>> >>>> Regards, >>>> Fabio >>> >>> Well, it turns out that this is indeed a regression, but I don't know >>> from which kernel version. >>> I reverted (not cleanly) this patch: >>> >>>        http://patchwork.kernel.org/patch/28591 >>> >>> and now >>> >>>        echo 1 > /sys/devices/platform/eeepc/cpufv >>> >>> enables the powersave mode and >>> >>>        echo 0 > /sys/devices/platform/eeepc/cpufv >>> >>> enables the performance mode. >>> >>> Tested with the non-benchmark glxgears (275 frames/sec in powersave >>> mode and 405 in performance mode) and stellarium (14 frames and 20 >>> frames). >>> >>> Regards, >>> Fabio >>> >> >> Thanks for the report, >> Could you try to add a quick printk to show the value stored in >> set_acpi(CM_ASL_CPUFV, value); ? >> And also, could you send the result of acpidump ? >> Thanks, > > After the revert there is no set_acpi(CM_ASL_CPUFV, value) anymore. > Please find the acpidump in attachment. > > Regards, > Fabio Yep, I know, but un-revert the patch, and add a printk :p Could you also send the result of: /* clean boot */ cat cpufv echo 0 > cpufv cat cpufv echo 1 > cpufv cat cpufv Thanks, -- Corentin Chary http://xf.iksaif.net