tech-kern archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]

acpitz: fan sensor


Although ACPI Specification defines an ACPI device
for FANs, BIOS vendors and OEMs do their own thing.

By reading the ACPI dump I figured out that my
HP Pavillion dv9700 laptop features a fan sensor
in the ACPI Thermal Zone which is beyond of the ACPI

This patch implements support for the fan sensor
including the limits:

envstat shows
  Processor Thermal Zone:     56.000   95.000                       degC
                     fan:       2840                                 RPM

envstat -W shows
  Processor Thermal Zone:     55.000                                degC
                     fan:       2570     4500     2000               RPM

W/o my patch, envstat shows

     temperature:     55.000   95.000                       degC


Home | Main Index | Thread Index | Old Index