acpi thermal module

yakoub · 10-02-2006, 01:09 PM

why doesn't my system temprature show in /proc/acpi/thermal ?
why is /proc/acpi/thermal empty ?

i got generic kernel package 2.6.* from slackware current distribution
after i load modules ac then processor then thermal , i do
ls /proc/acpi/thermal and it is empty .

Bruce Hill · 10-20-2006, 07:26 PM

The Linux kernel doesn't provide ACPI support for all motherboards.
Most that I've tried it on, with the exception of laptops, don't show
anything. Try lm_sensors in Slackware 11.0:

Code:

mingdao@silas:~$ less /server2/ftp/pub/Linux/Slackware/slackware-current/slackware/PACKAGES.TXT
PACKAGE NAME:  lm_sensors-2.10.0-i486-3.tgz
PACKAGE LOCATION:  ./slackware/ap
PACKAGE SIZE (compressed):  292 K
PACKAGE SIZE (uncompressed):  1070 K
PACKAGE DESCRIPTION:
lm_sensors: lm_sensors (hardware monitoring package)
lm_sensors:
lm_sensors: lm_sensors provides tools for monitoring the temperatures, voltages,
lm_sensors: and fans of Linux systems with hardware monitoring devices.  Included
lm_sensors: are text-based tools for sensor reporting, and a library for sensors
lm_sensors: access called libsensors.  It also contains tools for sensor hardware
lm_sensors: identification and I2C bus probing.
lm_sensors:
lm_sensors: IMPORTANT NOTE:  If you have a Thinkpad, please read the warnings in
lm_sensors: the README.thinkpad file.  lm_sensors has been known to cause damage
lm_sensors: to some Thinkpads.

It shows much more than just CPU temp. Here's a screenshot.

yakoub · 10-21-2006, 03:50 AM

yes i run sensors and gkrellm .
i got it8712 chip so the module it87 is loaded
and sensors give three temperatures :

Code:

M/B Temp:    +33°C  (low  =   +15°C, high =   +40°C)   sensor = thermistor   
CPU Temp:    +29°C  (low  =   +15°C, high =   +45°C)   sensor = thermistor   
Temp3:       +27°C  (low  =   +15°C, high =   +45°C)   sensor = diode

but bios read CPU Temp 55°C not 29°C , maybe there
is specail meaning for '+' , and it is not absolute value ?

Bruce Hill · 10-21-2006, 05:57 AM

I don't know much about the app. Mine reports:

Code:

+5V:       +5.11 V  (min =  +0.00 V, max =  +3.71 V)       ALARM  
+12V:     +11.25 V  (min =  +2.55 V, max =  +1.03 V)       ALARM  
-12V:      +1.13 V  (min =  +2.11 V, max =  -6.36 V)       ALARM  
-5V:       +5.10 V  (min =  -5.75 V, max =  +0.83 V)       ALARM  
V5SB:      +5.54 V  (min =  +4.19 V, max =  +2.61 V)       ALARM  
VBat:      +0.00 V  (min =  +1.14 V, max =  +0.00 V)       ALARM  
fan1:     3590 RPM  (min = 21774 RPM, div = 2)              ALARM  
fan2:     3879 RPM  (min = 2812 RPM, div = 2)                     
temp1:       +28°C  (high =    +4°C, hyst =   +14°C)   sensor = thermistor   ALARM   
temp2:     +38.5°C  (high =   +80°C, hyst =   +75°C)   sensor = thermistor           
alarms:   Chassis intrusion detection                      ALARM
beep_enable:
          Sound alarm enabled

eeprom-i2c-0-52
Adapter: SMBus Via Pro adapter at 0400
Memory type:            DDR SDRAM DIMM
Memory size (MB):       512

eeprom-i2c-0-51
Adapter: SMBus Via Pro adapter at 0400
Memory type:            DDR SDRAM DIMM
Memory size (MB):       512

eeprom-i2c-0-50
Adapter: SMBus Via Pro adapter at 0400
Memory type:            DDR SDRAM DIMM
Memory size (MB):       1024

I assume temp1 is case, temp2 is CPU, and all values are correct.

willysr · 10-21-2006, 08:45 PM

Is there any other application which can show your thermal information on your desktop besides gkrellm?

Or perhaps by looking at /proc/acpi/thermal is also working?

Thanks

Bruce Hill · 10-21-2006, 08:47 PM

Willy,

You misread his first post ^^^ apparently.

cwwilson721 · 10-21-2006, 09:53 PM

I know this is silly, but did you try

Code:

cat /proc/acpi/thermal_zone/THRM/temperature

If it says it doesn't exist, then you need to recompile your kernel to <include> those values, not as modules...

yakoub · 10-22-2006, 09:58 AM

i have compiled 2.6.18 and included acpi as modules

are you sure that by including them staticly they
would produce different functionality ? it doesn't make sense .

i will try to compile like you siad but it is most
likely that kerenel acpi simply doesn't support my GA-7n400s-l
when i had EP-8khal+ i could read /proc/acpi/thermal_zone/...
without problems , and it showed same temperature as bios

cwwilson721 · 10-22-2006, 10:40 AM

Mine didn't work either until I compiled statically. Then it worked fine.

willysr · 10-22-2006, 07:54 PM

yeah, i think i have the same problem (compiling as modules) because when i looked at /proc/acpi/thermal_zone, it's empty