No Sensors Detected on Toshiba Satellite M50

[ticket]

I have a Toshiba Satellite M50 laptop with an ATI IXP SB400 SMBus controller running Ubuntu 7.10 (2.6.22-14-generic kernel). Is this chipset supported? I could not find it listed in the Devices section. Output from sensors-detect that is relevant:

Probing for PCI bus adapters...
Use driver `i2c-piix4' for device 0000:00:14.0: ATI Technologies Inc IXP SB400 SMBus Controller

To continue, we need module `i2c-dev' to be loaded.
Do you want to load `i2c-dev' now? (YES/no): 
Module loaded successfully.

Next adapter: SMBus PIIX4 adapter at 8400 (i2c-0)
Do you want to scan it? (YES/no/selectively): 
Client found at address 0x52
Handled by driver `eeprom' (already loaded), chip type `eeprom'
    (note: this is probably NOT a sensor chip!)
Client found at address 0x53
Handled by driver `eeprom' (already loaded), chip type `eeprom'
    (note: this is probably NOT a sensor chip!)

The ISA I/O, Super I/O and embedded sensor scans all returned 'No'.

Sorry, no sensors were detected.

I first used the lm-sensors 2.10.4 package from the Ubuntu distribution. Tried 2.10.5 but it would not compile, then upgraded to sensors version 3.0.0-rc3 with libsensors version 3.0.0-rc3 and got the same results.

[khali]

The ATI IXP SB400 SMBus controller is supported (by the i2c-piix4 driver), however this south bridge doesn't embed sensors. If there were a usable sensor chip on your system, sensors-detect would have seen it.

It is very frequent that laptops do not have any sensor chip exposed. In most cases, there's only a CPU temperature sensor and only ACPI has access to it. Try loading the "thermal" driver and running "acpi -t" (or looking into /proc/acpi/thermal_zone manually). That's probably all you can get on your laptop.