From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-path: Received: from bh-25.webhostbox.net ([208.91.199.152]:47875 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932779AbeFGPtR (ORCPT ); Thu, 7 Jun 2018 11:49:17 -0400 Date: Thu, 7 Jun 2018 08:49:15 -0700 From: Guenter Roeck To: Kai Heng Feng Cc: Chris Ouellet , linux-hwmon@vger.kernel.org, Linux Kernel Mailing List Subject: Re: Ryzen 2700 Temperature offset? Message-ID: <20180607154915.GA7061@roeck-us.net> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-hwmon-owner@vger.kernel.org List-Id: linux-hwmon@vger.kernel.org On Thu, Jun 07, 2018 at 11:03:13AM +0800, Kai Heng Feng wrote: > Hi Guenter, > > A user thinks the Ryzen 2700 temperature may not be correct [1]. > Can you take a look when you have time? Thanks. > > Also, where can I find all these temperature offsets? I googled but with no > result. > Problem is that the offsets are not documented in public, making it difficult to find out. For Ryzen 2700, there is currently no offset configured; I was told that there is none. For Ryzen 2700X, the offset is 10 degrees C. > [1] https://bugs.launchpad.net/bugs/1774817 The key here is the commit mentioned in the log (1b59788979acd). It does not only adjust the per-CPU offset, but also takes a configurable offset of 49 degrees C into account. You'll need to apply that patch in your kernel, or the temperature may be off by 49 degrees C. Hope this helps. If not, please let me know. Note that I am travelling; responses may be delayed. Guenter