From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ognjen Galic Subject: Re: thinkpad E555, fan module not loaded Date: Wed, 20 Dec 2017 20:14:55 +0100 Message-ID: <20171220191455.GA5734@thinkpad> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-wr0-f179.google.com ([209.85.128.179]:44790 "EHLO mail-wr0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755902AbdLTTO7 (ORCPT ); Wed, 20 Dec 2017 14:14:59 -0500 Received: by mail-wr0-f179.google.com with SMTP id l41so11004084wre.11 for ; Wed, 20 Dec 2017 11:14:58 -0800 (PST) Content-Disposition: inline Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: gibboris@gmail.com, linux-acpi@vger.kernel.org > Hi, > I post here as a last ressort as advised at the end of this thread > https://www.spinics.net/lists/ibm-acpi-devel/msg04173.html > > I own a Thinkpad E555/Kaveri which is overheating. > I noticed fan stopped working soon after a 4.9 => 4.12 (Debian Jessie => > Stretch) upgrade. > BIOS is up to date, kernel is 4.12. > fan runs during BIOS & GRUB stages (or if booting acpi=off) > The main symptom seems to be that the "fan" module is not loaded. > I already provided information and a couple of ACPI tables in the above > thread. > > What more may I provide in order to efficiently help getting this > spotted & solved? Thanks for contacting us! That could be caused by two modules, either thinkpad_acpi or fan. First, build a kernel with both modules not built at all and install the kernel. The fan should work just fine as both fan and thinkpad_acpi are not loaded. Then, build the battery and thinkpad_acpi modules and load one by one, and see which one causes the issue and report back. Thanks, Ognjen