On 03/08/2014 03:08 AM, Jean Delvare wrote:
On Fri, 7 Mar 2014 14:52:30 -0800, Guenter Roeck wrote:
On Fri, Mar 07, 2014 at 11:04:29PM +0100, Manuel Krause wrote:
Hi, and thanks for the quick response!
No special fancy "fan control policy". 'fancontrol' isn't up or
running.
Vanilla kernels 3.11.* and 3.12.* had been working on here without
any extra work.
--
# sensors
acpitz-virtual-0
Adapter: Virtual device
temp1: +71.0°C (crit = +256.0°C)
temp2: +69.0°C (crit = +110.0°C)
temp3: +52.0°C (crit = +105.0°C)
temp4: +25.0°C (crit = +110.0°C)
temp5: +58.0°C (crit = +110.0°C)
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +62.0°C (high = +105.0°C, crit = +105.0°C)
Core 1: +60.0°C (high = +105.0°C, crit = +105.0°C)
--
My notebook (HP/Compaq 6730b) does not have a seperate fan sensor.
This is with 3.12.13 with my normal workload.
Please, trust my above mentionned values of 94 °C vs. 74°C as I
don't like to boot 3.13.6 anymore, to avoid harm to the notebook's
casing.
Understood. Unfortunately, we'll need to get information
from the new kernel to be able to track down the problem.
Indeed. Not only the run-time temperatures, but also the high and crit
limits.
But I'd do to test any improvement-patch.
So far I have no idea what is going on. I don't see anything in the
drivers providing above data that would explain the behavior,
but I might be missing something.
Looks like a regression in the acpi subsystem or in power management,
not hwmon. Hwmon is merely reporting the temperatures, it's not
responsible for the actual temperatures.
I would agree. I don't think we have enough information to be sure,
though. There might be some unintended interaction or interference.
gpu is a good hint ... for example, look at commit b9ed919f1c8
(drm/nouveau/drm/pm: remove everything except the hwmon interfaces
to THERM). nouveau does export pwm and fan control information,
so any change in that code may have unintended side effects.
Similar, I don't know how ec39f64bba (drm/radeon/dpm: Convert to
use devm_hwmon_register_with_groups) could have the observed impact,
as it is purely passive, but I prefer to be rather safe than sorry.
This problem has now been submitted into bugzilla as
https://bugzilla.kernel.org/show_bug.cgi?id=71711.
Guenter
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