Re: why does # of temperature sensors decrease in 3.11 (thinkfan config related)

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On Thu, Aug 22, 2013 at 06:09:01PM +0200, Toralf Förster wrote:
> On 08/22/2013 09:32 AM, Jean Delvare wrote:
> > Hi Toralf,
> > 
> > On Sun, 11 Aug 2013 10:46:03 +0200, Toralf Förster wrote:
> >> I'm just wondering why the # of sensors at my ThinkPad T420 lowers from
> >> 3 in kernel 3.10 :
> >>
> >> sensor /sys/devices/platform/coretemp.0/temp1_input     # physical id 0
> >> sensor /sys/devices/platform/coretemp.0/temp2_input     # core 0
> >> sensor /sys/devices/platform/coretemp.0/temp3_input     # core 1
> >>
> >> to just one for 3.11:
> >>
> >> /sys/class/hwmon/hwmon0/temp1_input
> > 
> > Most likely this is not even the same sensor. Check the value
> > of /sys/class/hwmon/hwmon0/name to find out what this sensor is. Could
> > be the graphics chip temperature readout, or an ACPI thermal zone.
> > 
> >> Do I miss a (new ?) kernel config ?
> > 
> > Output of "sensors" in both cases would help. Also make sure that your
> > new kernel still has CONFIG_SENSORS_CORETEMP enabled, and that the
> > coretemp driver is loaded if modular.
> > 
> 
> $ zgrep CONFIG_SENSORS_CORETEMP /proc/config.gz
> CONFIG_SENSORS_CORETEMP=m
> 
> Ah thx - a "modprobe coretemp" helps a lot - is this new ?
> 
> Now I do have the expected picture :
> 
> # sensors
> acpitz-virtual-0
> Adapter: Virtual device
> temp1:        +51.0°C  (crit = +98.0°C)
> 
> thinkpad-isa-0000
> Adapter: ISA adapter
> fan1:        3120 RPM
> 
> coretemp-isa-0000
> Adapter: ISA adapter
> Physical id 0:  +58.0°C  (high = +86.0°C, crit = +100.0°C)
> Core 0:         +58.0°C  (high = +86.0°C, crit = +100.0°C)
> Core 1:         +56.0°C  (high = +86.0°C, crit = +100.0°C)
> 
> 
> Why is that module not auto loaded ? Hhm ?
> 
It never was. Maybe your relase update replaced /etc/modules.

Guenter

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