On va avoir besoin de 2 choses :

quelques lignes à ajouter dans /etc/sensors3.conf pour indiquer le nom des sensors et les valeurs min/max

# Created for board DH67BL using information from Intel Desktop Utilities and BIOS
# "FRONT" and "REAR" fan labels correspond to the motherboard
# headers, but not necessarily the actual fan locations.

chip "nct6775-isa-0290"

# Fans
        label fan1 "Rear fan"
        set fan1_min 250 # From IDU

        label fan2 "CPU fan"
        set fan2_min 250 # From IDU

        label fan3 "Front fan"
        set fan3_min 250 # From IDU

	# There is no fan4 on the board
	ignore fan4

# Voltages

	# Processor Vcc
	label	in0		"Vcore"
	set	in0_min 	0.6 # From IDU
	set	in0_max 	1.6 # From IDU
	
	# This should be "12 Volts", but computations are strange
	label	in1		"+12V"
	compute	in1		11*@, @/11
	set	in1_min		11.1 # From IDU
	set	in1_max		12.9 # From IDU

	# AVCC(?) - Not shown in BIOS or IDU
	label	in2		"AVCC"
	set	in2_min		3.0		# same as +3.3V
	set	in2_max		3.6		# same as +3.3V

	# +3.3 Volts
	label	in3		"+3.3V"
	set	in3_min		3.0		# from IDU
	set	in3_max		3.6		# from IDU

	# +5 Volts
	label	in4		"+5V"
	compute	in4		5*@, @/5
	set	in4_min		4.6		# from IDU
	set	in4_max		5.4		# from IDU

	# Memory Vcc ("SDRAM Vcc" in IDU)
	label	in5		"MemV"
	compute	in5		1.5*@, @/1.5
	set	in5_min		0.4		# from IDU
	set	in5_max		2.0		# from IDU

	# PCH Vcc
	label	in6		"PCHV"
	set	in6_min		0.6		# from IDU
	set	in6_max		1.6		# from IDU

	# +3.3 Volt Standby
	label	in7		"3VSB"
	set	in7_min		3.0		# from IDU
	set	in7_max		3.6		# from IDU

	# VBAT(?) - Not shown in BIOS or IDU
	label	in8		"Vbat"

	# It shows +2.050 V, seems to be not used
	ignore	cpu0_vid

#	Temperatures

	# Labeled as "SYSTIN"
	# Guess!
	label	temp1		"VR temp"
	set	temp1_max 	90		# From IDU
	set	temp1_max_hyst 	75		# From IDU
	# Labeled as "CPUTIN"
	label	temp2		"CPU temp"
	set	temp2_max 	93		# From IDU
	set	temp2_max_hyst 	75		# From IDU
	# Labeled as "PECI Agent 0"
	# Guess!
	label	temp3		"Memory DIMM temp"
	set	temp3_max 	90		# From IDU
	set	temp3_max_hyst 	75		# From IDU
	# Labeled as "PCH_CHIP_TEMP"
	label	temp4		"PCH temp"

	# Labeled as "PECI Agent 1"
	# Not used
	ignore	temp8

Puis on va avoir besoin d'un module capable de lire les sensors (le plus important)
on va télécharger les 3 fichiers présents ici: http://www.roeck-us.net/linux/drivers/w83627ehf/
Puis on compile le module, on le copie ou il faut et on rescanne la liste de tous les modules, et enfin on l'ajoute au fichier /etc/modules pour qu'il soit chargé au démarrage.

cd /opt
mkdir w83627ehf
cd w83627ehf
wget http://www.roeck-us.net/linux/drivers/w83627ehf/Makefile
wget http://www.roeck-us.net/linux/drivers/w83627ehf/lm75.h
wget http://www.roeck-us.net/linux/drivers/w83627ehf/w83627ehf.c
make
cp ./w83627ehf.ko /lib/modules/2.6.32-5-amd64/kernel/drivers/hwmon/
depmod -a
modprobe w83627ehf
echo w83627ehf >> /etc/modules


Des fois que le site ne réponde plus, je vous ai fait un petit zip avec les 3 fichiers source, plus le module .ko compilé pour debian en kernel 2.6.32.5
Vous pouvez le télécharger ici

Et voila ! on peut maintenant faire un

modprobe w83627ehf

puis un

sensors

et admirer le résultat :

nct6775-isa-0290
Adapter: ISA adapter
Vcore:            +0.82 V  (min =  +0.00 V, max =  +1.74 V)   
+12V:            +12.58 V  (min =  +0.00 V, max =  +0.00 V)   ALARM
AVCC:             +3.34 V  (min =  +0.00 V, max =  +0.00 V)   ALARM
+3.3V:            +3.34 V  (min =  +0.00 V, max =  +0.00 V)   ALARM
+5V:              +5.24 V  (min =  +0.00 V, max =  +0.00 V)   ALARM
MemV:             +1.57 V  (min =  +0.00 V, max =  +0.00 V)   ALARM
PCHV:             +1.08 V  (min =  +0.00 V, max =  +0.00 V)   ALARM
3VSB:             +3.41 V  (min =  +0.00 V, max =  +0.00 V)   ALARM
Vbat:             +3.36 V  (min =  +0.00 V, max =  +0.00 V)   ALARM
Rear fan:           0 RPM  (min =    0 RPM, div = 128)
CPU fan:            0 RPM  (min =    0 RPM, div = 128)
Front fan:          0 RPM  (min =    0 RPM, div = 128)
VR temp:          +35.0°C  (high =  +0.0°C, hyst =  +0.0°C)  ALARM  sensor = diode
CPU temp:         +29.5°C  (high = +80.0°C, hyst = +75.0°C)  sensor = diode
Memory DIMM temp: +33.0°C  (high = +80.0°C, hyst = +75.0°C)  sensor = diode
PCH temp:         +50.0°C

source: http://lists.lm-sensors.org/pipermail/lm-sensors/2011-May/032644.html