From mboxrd@z Thu Jan 1 00:00:00 1970 From: Henrique de Moraes Holschuh Subject: Re: v4.8-rc1: thinkpad x60: running at low frequency even during kernel build Date: Sat, 5 Nov 2016 16:04:58 -0200 Message-ID: <20161105180458.GB17290@khazad-dum.debian.net> References: <20161104083849.GA32688@amd> <20161104085830.GA4089@amd> <1478268311.26953.17.camel@intel.com> <20161104204439.GA2581@amd> <20161104221600.GA7007@amd> <1478301649.7947.3.camel@intel.com> <20161105133719.GA3933@amd> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Return-path: Received: from out2-smtp.messagingengine.com ([66.111.4.26]:51988 "EHLO out2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754380AbcKESFC (ORCPT ); Sat, 5 Nov 2016 14:05:02 -0400 Content-Disposition: inline In-Reply-To: <20161105133719.GA3933@amd> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Pavel Machek Cc: "Pandruvada, Srinivas" , "linux-kernel@vger.kernel.org" , "Zhang, Rui" , "linux-pm@vger.kernel.org" , "platform-driver-x86@vger.kernel.org" , "rjw@rjwysocki.net" , "viresh.kumar@linaro.org" , "ibm-acpi-devel@lists.sourceforge.net" , "ibm-acpi@hmh.eng.br" , "linux-acpi@vger.kernel.org" On Sat, 05 Nov 2016, Pavel Machek wrote: > [ 825.759661] thinkpad_acpi: THERMAL EMERGENCY: a sensor reports something is extremely hot! > [ 825.761935] thinkpad_acpi: temperatures (Celsius): 101 49 N/A 78 33 N/A 33 N/A 47 50 N/A N/A N/A N/A N/A N/A Oh boy, that must be the second time in a decade that I see that codepath triggering. It is the second-level alert that the ThinkPad is about to catch fire. It should have logged a "is too hot!" first-level alert earlier, but this depends on the EC and not the driver. Maybe the temperature raised too fast. In Windows, the system would attempt to hibernate or shutdown. I would be quite happy to have thinkpad-acpi trigger such behavior as well, patches (or guidance) are welcome ;-) Anyway, if that temperature goes about 1~2°C higher, the EC should cut power to your motherboard. Apparently, the built-in thermal protection clock modulation on the Intel processor is somehow saving your box from that forced power-off. -- Henrique Holschuh