From: Guenter Roeck <linux@roeck-us.net>
To: James Cloos <cloos@jhcloos.com>
Cc: Aravind Gopalakrishnan <aravind.gopalakrishnan@amd.com>,
dri-devel@lists.freedesktop.org, lm-sensors@lm-sensors.org
Subject: Re: [lm-sensors] Kaveri [and Radeon] temps
Date: Wed, 05 Nov 2014 23:50:22 +0000 [thread overview]
Message-ID: <20141105235022.GA26085@roeck-us.net> (raw)
In-Reply-To: <m3ppd18bnn.fsf@carbon.jhcloos.org>
On Wed, Nov 05, 2014 at 06:34:20PM -0500, James Cloos wrote:
> >>>>> "GR" = Guenter Roeck <linux@roeck-us.net> 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
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lm-sensors@lm-sensors.org
http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
WARNING: multiple messages have this Message-ID (diff)
From: Guenter Roeck <linux@roeck-us.net>
To: James Cloos <cloos@jhcloos.com>
Cc: Aravind Gopalakrishnan <aravind.gopalakrishnan@amd.com>,
dri-devel@lists.freedesktop.org, lm-sensors@lm-sensors.org
Subject: Re: Kaveri [and Radeon] temps
Date: Wed, 5 Nov 2014 15:50:22 -0800 [thread overview]
Message-ID: <20141105235022.GA26085@roeck-us.net> (raw)
In-Reply-To: <m3ppd18bnn.fsf@carbon.jhcloos.org>
On Wed, Nov 05, 2014 at 06:34:20PM -0500, James Cloos wrote:
> >>>>> "GR" == Guenter Roeck <linux@roeck-us.net> 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
next prev parent reply other threads:[~2014-11-05 23:50 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-05 21:15 [lm-sensors] Kaveri temps James Cloos
2014-11-05 23:21 ` [lm-sensors] Kaveri [and Radeon] temps Guenter Roeck
2014-11-05 23:21 ` Guenter Roeck
2014-11-05 23:34 ` [lm-sensors] " James Cloos
2014-11-05 23:34 ` James Cloos
2014-11-05 23:50 ` Guenter Roeck [this message]
2014-11-05 23:50 ` Guenter Roeck
2014-11-06 15:17 ` [lm-sensors] " Aravind Gopalakrishnan
2014-11-06 15:17 ` Aravind Gopalakrishnan
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