From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mahmood Naderan Subject: BIOS and CPU C_states are strange Date: Fri, 19 Jun 2009 21:37:18 +0430 Message-ID: <1acba2fa0906191007l4b8d5c17id068d868e6178fb8@mail.gmail.com> References: <1acba2fa0906191006i3cd5a035pf18e096fdb92e27e@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mail-fx0-f212.google.com ([209.85.220.212]:34513 "EHLO mail-fx0-f212.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751997AbZFSRHQ (ORCPT ); Fri, 19 Jun 2009 13:07:16 -0400 Received: by fxm8 with SMTP id 8so210034fxm.37 for ; Fri, 19 Jun 2009 10:07:18 -0700 (PDT) In-Reply-To: <1acba2fa0906191006i3cd5a035pf18e096fdb92e27e@mail.gmail.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org Hi, I have run powertop with root permission with both AC and batter powers. The reported C_States are the same and strange: mahmood@magma:~$ sudo powertop PowerTOP 1.11 (C) 2007, 2008 Intel Corporation Collecting data for 5 seconds Your CPU supports the following C-states : C1 C2 C3 C4 C5 C6 Your BIOS reports the following C-states : C1 C2 C6 Where are C4 and C5? -------------------------- *Mahmood Naderan*