Hi Rudolf, Yeah, let me do some checking. I was already aware that our docs were missing this information; need to check if there are actual plans to address or not. Best Regards, Jon > -----Original Message----- > From: Rudolf Marek <r.marek@xxxxxxxxxxxx> > Sent: Friday, June 15, 2018 4:57 PM > To: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>; Grimm, Jon > <Jon.Grimm@xxxxxxx> > Cc: Guenter Roeck <linux@xxxxxxxxxxxx>; Chris Ouellet > <rabbit.of.war@xxxxxxxxx>; linux-hwmon@xxxxxxxxxxxxxxx; Linux Kernel > Mailing List <linux-kernel@xxxxxxxxxxxxxxx> > Subject: Re: Ryzen 2700 Temperature offset? > > Hi Jon, > > Please can you help? > > Thanks > Rudolf > > > Dne 10.6.2018 v 07:14 Guenter Roeck napsal(a): > > On Sun, Jun 10, 2018 at 03:03:47AM +0800, Kai-Heng Feng wrote: > >> at 23:49, Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > >> > >>> 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. > >> > >> I am still quite interesting where you get this information... > >> > > Primarily lots of online research. Windows tools usually support the > > offsets, so screendumps help in some cases. > > > >>> > >>>> [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. > >> > >> So unless AMD shares these offsets value, we can never know what > >> correct offsets are? > >> > > Unfortunately that is correct. > > > > AFAIK the information is available from AMD under NDA. I can not sign > > such an NDA, and even if I could and would, I could not use the > > information in an open source driver. Kind of a loose-loose situation. > > If you (Canonical) have any influence at AMD, it might be useful to > > let them know that their policy is not very helpful. > > > > Guenter > > > > > >> Kai-Heng > >> > >>> > >>> Hope this helps. If not, please let me know. Note that I am > >>> travelling; responses may be delayed. > >>> > >>> Guenter > >> > >> > >> -- > >> To unsubscribe from this list: send the line "unsubscribe > >> linux-hwmon" in the body of a message to majordomo@xxxxxxxxxxxxxxx > >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-hwmon" > > in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo > > info at http://vger.kernel.org/majordomo-info.html > > -- To unsubscribe from this list: send the line "unsubscribe linux-hwmon" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
