From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" Subject: Re: Power regression found on 3.6-rc1+ Date: Mon, 29 Oct 2012 08:49:38 +0100 Message-ID: <2972912.ooClOChIux@vostro.rjw.lan> References: Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7Bit Return-path: In-Reply-To: Sender: linux-pci-owner@vger.kernel.org To: Micael Cc: linux-kernel@vger.kernel.org, Linux PM list , Linux PCI , Zheng Yan , Bjorn Helgaas , Huang Ying List-Id: linux-pm@vger.kernel.org On Friday, October 26, 2012 12:37:36 AM Micael wrote: > I have a laptop running Arch Linux and found that upgrading from 3.5.6 > to 3.6.2 had a huge impact on my battery life. Power consumption went > from ~10W to ~20W. > I initially thought it was a i915 driver problem since the CPU temps > went up and so I opened this bug: > https://bugzilla.kernel.org/show_bug.cgi?id=49031 > > However, as you can see if you read the bug's comments, after > bisecting this I found the culprit to be commit > 71a83bd727cc31c5fe960c3758cb396267ff710e: > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=71a83bd727cc31c5fe960c3758cb396267ff710e I wonder what the problem may be here. It looks like the polling change in pci_pme_list_scan() is causing problems to happen. Thanks, Rafael -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center.