From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754653Ab0CIW6y (ORCPT ); Tue, 9 Mar 2010 17:58:54 -0500 Received: from mail-ew0-f216.google.com ([209.85.219.216]:42647 "EHLO mail-ew0-f216.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751785Ab0CIW6u (ORCPT ); Tue, 9 Mar 2010 17:58:50 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:cc:content-type; b=BBOk6DbultDcHpCw/6i9oRzUHwtrrlvjPLo7CAX9b2JU/te1rw4NCZk3d/2dqNOrcB /Nf/FYhQFoDejWMpozHMfR+mXmUpiZ9oPLeQJspPXOPArW6QiQt64Fiu56lhEr2yE+Ad ed1A/zSCZERYYQx61+x9cevLmqOgi+ReKS3Cs= MIME-Version: 1.0 Date: Tue, 9 Mar 2010 23:58:47 +0100 Message-ID: Subject: Possible bug in eeepc-laptop.c - EeePC 900 From: Fabio Comolli To: ACPI mailing list , Linux Kernel Mailing List Cc: Len Brown , Corentin Chary Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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