Dell Poweredge 830 - sensors all display 0 values

[ticket]

Hi

I'm trying to use lm-sensors on a Dell Poweredge 830 server, running Ubuntu Edgy. Everything seems to install OK, but this is what I get when I run sensors:

dan@Panoramix:~$ sudo sensors

lm85-i2c-0-2e
Adapter: SMBus I801 adapter at 08c0

V1.5:       +0.00 V  (min =  +1.42 V, max =  +1.58 V)   
VCore:      +0.00 V  (min =  +1.03 V, max =  +1.14 V)   
V3.3:       +0.00 V  (min =  +3.13 V, max =  +3.47 V)   
V5:        +0.00 V  (min =  +4.74 V, max =  +5.26 V)   
V12:       +0.00 V  (min = +11.38 V, max = +12.62 V)   
CPU_Fan:      0 RPM  (min = 4000 RPM)                     ALARM
fan2:         0 RPM  (min =    0 RPM)                     ALARM
fan3:         0 RPM  (min =    0 RPM)                     ALARM
fan4:         0 RPM  (min =    0 RPM)                     ALARM
CPU:          +0°C  (low  =   +10°C, high =   +50°C)       
Board:        +0°C  (low  =   +10°C, high =   +35°C)      
Remote:       +0°C  (low  =   +10°C, high =   +35°C)       
CPU_PWM:   255
Fan2_PWM:  255
Fan3_PWM:  255
vid:      +1.087 V  (VRM Version 10.0)

I have read that Dell machines are sometimes difficult to configure, but I really don't know where to start. Any pointers?

Many thanks