From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sascha Heid Subject: CoreDuo Bus-Master-Activity on Core1 ffffffff when idle, no C3 Date: Fri, 09 Feb 2007 03:47:06 +0100 Message-ID: <1170989226.4546.17.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from nf-out-0910.google.com ([64.233.182.189]:35211 "EHLO nf-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1946009AbXBIBrR (ORCPT ); Thu, 8 Feb 2007 20:47:17 -0500 Received: by nf-out-0910.google.com with SMTP id o25so1053052nfa for ; Thu, 08 Feb 2007 17:47:16 -0800 (PST) Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org Hi List! i recently got a Lenovo X60T, installed Gentoo Linux, and since then i am trying to figure out why i miss 2h of battery-life compared to Windows-Users. After a while i noticed that the Bus-Master-Activity on CPU1 is ffffffff when its idle and only drops if i give it some work to do (like a kernel compile with make -j3) When i put some load on both cores the Bus Master Activity of CPU1 is normalizing itself and varies according to the load. When i leave the Laptop idle for a while it gets actually hotter (60C) then when i use it (44C). The CPU is not able to stay in C3, it tries but comes back to C2 within the second, i assume that is because of the high Bus Master Activity of CPU1? I have already looked for help about this on various forums and mailing lists and i talked to other people with CoreDuo's and they do not have this issue with the Bus Master Activity. I tried alot of different kernels (2.6.19 and 2.6.20) and setups or used preconfigured Kernels or even Live-Distros. I also booted a *very* minimal Gentoo-Linux setup, no WLAN, no USB, no X etc., and played with the BIOS-Settings (disabling as much as possible), and now i am at a point where i really dont know what to do anymore and i fear that im not getting any answers anywhere. If anyone has any advice, information or would like to see some logs or configs, i would be very gratefull. Greetings from Germany, Sascha