Unable to detect a thermal sensor: lm_sensors and ACPI

Question

HP Pavilion ze5600 laptop, latest Arch kernel, ran sensors-detect and this is the result:
Sorry, no sensors were detected.
This is relatively common on laptops, where thermal management is
handled by ACPI rather than the OS.
I tried "sudo modprobe thermal" and although successful there is no thermal entry in /proc/acpi . I also tried adding "acpi_enforce_resources=lax" to kernel boot line without success. I also attempted to insert the i2c-dev module before running sensors-detect, without success.
As I have not tried any other OS on this laptop I am unsure whether it does actually have a sensor but googling around others seem to have been successful. Any suggestions on how to proceed would be most welcome.

Answer 1

I'd love to see this thread solved as my Dell XPS L1502 has the same situation. A sensors-detect brings the same module as you but the sensors outputs temperatures for just 2 cores for an i5 should be listed, which are about 50°C (normal?).
acpitz-virtual-0
Adapter: Virtual device
temp1: +54.0°C (crit = +100.0°C)
temp2: +54.0°C (crit = +100.0°C)
coretemp-isa-0000
Adapter: ISA adapter
Physical id 0: +55.0°C (high = +86.0°C, crit = +100.0°C)
Core 0: +54.0°C (high = +86.0°C, crit = +100.0°C)
Core 1: +49.0°C (high = +86.0°C, crit = +100.0°C)
The pwmconfig returns an error "no pwm-capable sensor modules installed".
Thanks for everyone contributing to this thread.
Last edited by nunobaba (2011-10-14 16:08:32)