3. The mainboard's sensors
3.1 lm-sensors
Getting the drivers
Get the lm_sensors 2.6.2 or more recent: http://www.lm-sensors.nu/archive/lm_sensors-2.6.2.tar.gz You'll need kernel sources too in order to compile that one.
Installing them
tar -xzvf i2c-2.6.2.tar.gz
cd i2c-2.6.2
make && make install
Then there was a problem when making install for me, so if it doesn't work, just do the following:
cp kernel/i2c-core.o /lib/modules/`uname -r`/misc/i2c-core.o
cp kernel/i2c-proc.o /lib/modules/`uname -r`/misc/i2c-proc.o
Now let's copy the specific driver:
cp kernel/chips/it87.o /lib/modules/`uname -r`/misc/it87.o
ok now
cp prog/sensors/sensors /usr/bin/sensors
--------------------------------------------------------------------
Edit /etc/modules.conf and add to it the following lines:
alias char-major-89 i2c-dev
options it87 temp_type=0x31
now:
modprobe i2c-proc
modprobe it87
modprobe i2c-isa
sensors
should output you some data
When it works, you can write it to a file, that will be loaded automatically on
boot. Under
SuSE the file is:
/etc/init.d/boot.local (used to be /sbin/init.d/)
and you should just add: sensors -s
Under mandrake, the install should have created that file:
/etc/init.d/sensors, which you can edit freely, sensord being just a
daemon to watch over temperature and fan speed, I assume no one
will need something like that for her/his own machine.
Paolo reports that in order to start up sensord on boot, he put in /etc/sysconfig/sensors:
MODULE_0=i2c-proc
MODULE_1=it87
MODULE_2=i2c-isa
Now as root you should edit your /etc/sensors.conf
search for that line: chip "it87-*"
and below you should be able to modify everything to get the right data, here is
a copy of what i have in there:
(please note that temp1 is trash and only temp2 and temp3 should be kept)
--------------------------------------------------------------------
3.2 lm-sensors the Debian way
This time you'll be forced to compile the modules. install the source and programs:
apt-get install lm-sensors lm-sensors-source
The upstream lm-sensors maintainers know of a problem using
lm-sensors with IBM ThinkPad computers, resulting in
firmware corruption. If you are installing this package on
a ThinkPad, you should wait until the upstream maintainers
have solved this problem before building modules from it.
For more information, see
/usr/share/doc/lm-sensors-source/README.thinkpad.
IBM ThinkPad brokenness -- really install lm-sensors?
cd /usr/src
tar xzvf lm-sensors.tar.gz
cd modules/lm-sensors/
make && make install
Then you should have modutils take a few arguments, the best way is probably to use a new file, like: /etc/modutils/sensors with this content:
alias char-major-89 i2c-dev
options it87 temp_type=0x31
update-modules
modprobe i2c-isa it87
You can now type sensors to access to the informations (note that you should edit sensors.conf, otherwise you'll see strange and inaccurate things :] )
You can also put i2c-isa and it87 in /etc/modules (one by line!) to have them be automatically loaded on boot, I don't know yet, how/whether it is possible to use some automatic loading/removing process with /etc/modules.conf
3.3 Sensors.conf for the K7s5a
#David Thorarinsson explained me that all the 'set' lines should be after the compute ones,
#this is now fixed,
chip "it87-*"
# The values below have been tested on Asus CUSI, CUM motherboards.
# Voltage monitors as advised in the It8705 data sheet
label in0 "VCore"
label in1 "Vcc2.5V"
label in2 "+3.3V"
label in3 "+5V"
label in4 "+12V"
label in5 "-12V"
label in6 "-5V"
label in7 "SB 5V"
label in8 "V battery"
# vid not monitored by IT8705F
ignore vid
# For this family of chips the negative voltage equation is different from
# the lm78. The chip uses two external resistor for scaling but one is
# tied to a positive reference voltage. See ITE8705/12 datasheet (SIS950
# data sheet is wrong)
# Vs = (1 + Rin/Rf) * Vin - (Rin/Rf) * Vref.
# Vref = 4.096 volts, Vin is voltage measured, Vs is actual voltage.
# compute in2 (1 + 1)*@ , @/(1 + 1)
compute in3 ((6.8/10)+1)*@ , @/((6.8/10)+1)
compute in4 ((30/10) +1)*@ , @/((30/10) +1)
# The next two are negative voltages (-12 and -5).
# The following formulas must be used. Unfortunately the datasheet
# does not give recommendations for Rin, Rf, but we can back into
# them based on a nominal +2V input to the chip, together with a 4.096V Vref.
# Formula:
# actual V = (Vmeasured * (1 + Rin/Rf)) - (Vref * (Rin/Rf))
# For -12V input use Rin/Rf = 6.68
# For -5V input use Rin/Rf = 3.33
# Then you can convert the forumula to a standard form like:
compute in5 -(36/10)*@, -@/(36/10)
#(7.67 * @) - 27.36 , (@ + 27.36) / 7.67
compute in6 -(56/10)*@, -@/(56/10)
#(4.33 * @) - 13.64 , (@ + 13.64) / 4.33
compute in7 ((6.8/10)+1)*@ , @/((6.8/10)+1)
set in0_min 1.7 * 0.95
set in0_max 1.7 * 1.05
set in1_min 2.4
set in1_max 2.6
set in2_min 3.3 * 0.95
set in2_max 3.3 * 1.05
set in3_min 5.0 * 0.95
set in3_max 5.0 * 1.05
set in4_min 12 * 0.95
set in4_max 12 * 1.05
set in5_min -12 * 0.95
set in5_max -12 * 1.05
set in6_min -5 * 0.95
set in6_max -5 * 1.05
set in7_min 5 * 0.95
set in7_max 5 * 1.05
# Temperature
label temp3 "Processor"
set temp3_over 40
set temp3_hyst 20
label temp2 "Mainboard"
set temp2_over 45
set temp2_hyst 25
ignore temp1
# Fans
label fan1"Processor's Fan"
set fan1_min 2000
ignore fan3
ignore fan2
#
# If you have a system fan, comment 'ignore fan2'
# and uncomment the following lines :
# Thanks to gro.reirual@erreip
#
# label fan2 "System Fan"
# set fan2_min 3000
# set fan2_div 4
3.4 Sensors on 2.6 kernels
Kernel 2.6.1 configuration:
# Bus options (PCI, PCMCIA, EISA, MCA, ISA)
CONFIG_ISA=y
# I2C support
CONFIG_I2C=m
CONFIG_I2C_CHARDEV=m
# I2C Hardware Bus support
CONFIG_I2C_ISA=m
# I2C Hardware Sensors Chip support
CONFIG_I2C_SENSOR=m
CONFIG_SENSORS_IT87=m
Setting up the modules
mount sysfs pseudo filesystem if you have not done it yet.
mount -t sysfs sysfs /sys
See Documentation/filesystems/sysfs.txt and Documentation/i2c/sysfs-interface in the kernel sources tree
modprobe it87
modprobe i2c-isa Sensors can be accessed in the sysfs pseudo file system. But if you want you can use the lm_sensors user tools...
The lm_sensors user tools
Install sensors user tools:
cd lm_sensors-2.8.3
copy this into a file named chips-it87.diff
NOTE: This patch is only required for old versions of lm_sensors, Paolo wrote:
"A reply from lm_sensors developers said that the next version of lm_sensors will fix this. It is already fixed in CVS."
--- lib/chips.c Sun Jan 25 00:13:49 2004
+++ ../lm_sensors-2.8.3.OK/lib/chips.c Sat Jan 24 01:23:43 2004
@@ -3757,13 +3757,13 @@
R, IT87_SYSCTL_TEMP2, VALUE(3), 1 },
{ SENSORS_IT87_TEMP3, "temp3", NOMAP, NOMAP,
R, IT87_SYSCTL_TEMP3, VALUE(3), 1 },
- { SENSORS_IT87_TEMP1_LOW, "temp1_hyst", SENSORS_IT87_TEMP1,
+ { SENSORS_IT87_TEMP1_LOW, "temp1_min", SENSORS_IT87_TEMP1,
SENSORS_IT87_TEMP1, RW,
IT87_SYSCTL_TEMP1, VALUE(2), 1 },
- { SENSORS_IT87_TEMP2_LOW, "temp2_hyst", SENSORS_IT87_TEMP2,
+ { SENSORS_IT87_TEMP2_LOW, "temp2_min", SENSORS_IT87_TEMP2,
SENSORS_IT87_TEMP2, RW,
IT87_SYSCTL_TEMP2, VALUE(2), 1 },
- { SENSORS_IT87_TEMP3_LOW, "temp3_hyst", SENSORS_IT87_TEMP3,
+ { SENSORS_IT87_TEMP3_LOW, "temp3_min", SENSORS_IT87_TEMP3,
SENSORS_IT87_TEMP3, RW,
IT87_SYSCTL_TEMP3, VALUE(2), 1 },
{ SENSORS_IT87_TEMP1_HIGH, "temp1_over", SENSORS_IT87_TEMP1,
apply the patch:
$ patch -p0<chips-it87.diff
$ make user
# make user_install
edit sensors.conf file it87 chip section (There is an example for more recent versions of lm_sensors in the following section)
3.5 Newer version of Sensors.conf
This version was sent by Paolo BERVA for lm_sensors 2.8.3.
chip "it87-*" "it8705-*" "it8712-*"
# The values below have been tested on Asus CUSI, CUM motherboards.
# Voltage monitors as advised in the It8705 data sheet
label in0 "VCore 1"
label in1 "VCore 2"
label in2 "+3.3V"
label in3 "+5V"
label in4 "+12V"
label in5 "-12V"
label in6 "-5V"
label in7 "Stdby"
label in8 "VBat"
set in0_min 1.7 * 0.95
set in0_max 1.7 * 1.05
set in1_min 2.4
set in1_max 2.6
set in2_min 3.3 * 0.95
set in2_max 3.3 * 1.05
set in3_min 5.0 * 0.95
set in3_max 5.0 * 1.05
set in4_min 12 * 0.95
set in4_max 12 * 1.05
set in5_max -12 * 0.95
set in5_min -12 * 1.05
set in6_max -5 * 0.95
set in6_min -5 * 1.05
set in7_min 5 * 0.95
set in7_max 5 * 1.05
#the chip does not support in8 min/max
# vid is not monitored by IT8705F
# and is not supported by driver at this time
ignore vid
# If 3.3V reads 2X too high (Soyo Dragon and Asus A7V8X-X, for example),
# comment out following line.
# compute in2 2*@ , @/2
#
compute in3 ((6.8/10)+1)*@ , @/((6.8/10)+1)
compute in4 ((30/10) +1)*@ , @/((30/10) +1)
# For this family of chips the negative voltage equation is different from
# the lm78. The chip uses two external resistor for scaling but one is
# tied to a positive reference voltage. See ITE8705/12 datasheet (SIS950
# data sheet is wrong)
# Vs = (1 + Rin/Rf) * Vin - (Rin/Rf) * Vref.
# Vref = 4.096 volts, Vin is voltage measured, Vs is actual voltage.
# The next two are negative voltages (-12 and -5).
# The following formulas must be used. Unfortunately the datasheet
# does not give recommendations for Rin, Rf, but we can back into
# them based on a nominal +2V input to the chip, together with a 4.096V Vref.
# Formula:
# actual V = (Vmeasured * (1 + Rin/Rf)) - (Vref * (Rin/Rf))
# For -12V input use Rin/Rf = 6.68
# For -5V input use Rin/Rf = 3.33
# Then you can convert the forumula to a standard form like:
# compute in5 (7.67 * @) - 27.36 , (@ + 27.36) / 7.67
# compute in6 (4.33 * @) - 13.64 , (@ + 13.64) / 4.33
#
# this much simpler version is reported to work for a
# Eltite Group K7S5A board
#
compute in5 -(34/10)*@, -@/(34/10)
compute in6 -(51/10)*@, -@/(51/10)
# compute in6 -(56/10)*@, -@/(56/10)
#
compute in7 ((6.8/10)+1)*@ , @/((6.8/10)+1)
# Temperature
#
# Important - if your temperature readings are completely whacky
# you probably need to change the sensor type.
# Adujst and uncomment the appropriate lines below.
# The old method (modprobe it87 temp_type=0xXX) is no longer supported.
#
# 2 = thermistor; 3 = thermal diode
# set sensor1 3
set sensor2 2
set sensor3 2
ignore temp1
label temp2 "M/B Temp"
set temp2_over 40
set temp2_min 20
label temp3 "CPU Temp"
set temp3_over 45
set temp3_min 25
# The A7V8X-X has temperatures inverted, and needs a conversion for
# CPU temp. Thanks to Preben Randhol for the formula.
# label temp1 "CPU Temp"
# label temp2 "M/B Temp"
# compute temp1 (-15.096+1.4893*@), (@+15.096)/1.4893
# The A7V600 also has temperatures inverted, and needs a different
# conversion for CPU temp. Thanks to Dariusz Jaszkowski for the formula.
# label temp1 "CPU Temp"
# label temp2 "M/B Temp"
# compute temp1 (@+128)/3, (3*@-128)
# Fans
label fan1 "CPU/Fan"
set fan1_div 2
set fan1_min 2000
label fan2 "Sys/Fan"
set fan2_div 4
set fan2_min 2000
ignore fan3
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