From mboxrd@z Thu Jan 1 00:00:00 1970 From: Guenter Roeck Date: Wed, 05 Nov 2014 23:50:22 +0000 Subject: Re: [lm-sensors] Kaveri [and Radeon] temps Message-Id: <20141105235022.GA26085@roeck-us.net> List-Id: References: <20141105232155.GA25189@roeck-us.net> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: James Cloos Cc: Aravind Gopalakrishnan , dri-devel@lists.freedesktop.org, lm-sensors@lm-sensors.org On Wed, Nov 05, 2014 at 06:34:20PM -0500, James Cloos wrote: > >>>>> "GR" = Guenter Roeck writes: > > ... > GR> AMD CPUs are known report wildly off temperatures especially at > GR> low temperatures. > > Thanks. After some further digging, I wonder whether Aravind's recent > patch might help? The apu does have both PCI_DEVICE_ID_AMD_16H_M30H_NB_F3 > and PCI_DEVICE_ID_AMD_16H_M30H_NB_F4 and lspci reports no driver for the > F4 device. > Aravind would have to comment; my understanding is that the F4 device reports the power, not the temperature. You could try to apply the patch and see if it makes a difference. Worst case there will be no change ;-). > GR> Does the temperature increase with load ? > > It seems to max out w/in a kelvin or two of the room's ambient temp. > Even under load ? Sounds weird. Question of course is if the chip really reports a useful temperature in the first place; this is something I can not answer, since I have neither a datasheet nor a system with that CPU. Guenter _______________________________________________ lm-sensors mailing list lm-sensors@lm-sensors.org http://lists.lm-sensors.org/mailman/listinfo/lm-sensors From mboxrd@z Thu Jan 1 00:00:00 1970 From: Guenter Roeck Subject: Re: Kaveri [and Radeon] temps Date: Wed, 5 Nov 2014 15:50:22 -0800 Message-ID: <20141105235022.GA26085@roeck-us.net> References: <20141105232155.GA25189@roeck-us.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: lm-sensors-bounces@lm-sensors.org Errors-To: lm-sensors-bounces@lm-sensors.org To: James Cloos Cc: Aravind Gopalakrishnan , dri-devel@lists.freedesktop.org, lm-sensors@lm-sensors.org List-Id: dri-devel@lists.freedesktop.org On Wed, Nov 05, 2014 at 06:34:20PM -0500, James Cloos wrote: > >>>>> "GR" == Guenter Roeck writes: > > ... > GR> AMD CPUs are known report wildly off temperatures especially at > GR> low temperatures. > > Thanks. After some further digging, I wonder whether Aravind's recent > patch might help? The apu does have both PCI_DEVICE_ID_AMD_16H_M30H_NB_F3 > and PCI_DEVICE_ID_AMD_16H_M30H_NB_F4 and lspci reports no driver for the > F4 device. > Aravind would have to comment; my understanding is that the F4 device reports the power, not the temperature. You could try to apply the patch and see if it makes a difference. Worst case there will be no change ;-). > GR> Does the temperature increase with load ? > > It seems to max out w/in a kelvin or two of the room's ambient temp. > Even under load ? Sounds weird. Question of course is if the chip really reports a useful temperature in the first place; this is something I can not answer, since I have neither a datasheet nor a system with that CPU. Guenter _______________________________________________ lm-sensors mailing list lm-sensors@lm-sensors.org http://lists.lm-sensors.org/mailman/listinfo/lm-sensors