NAME

       thermald - start Linux thermal daemon

SYNOPSIS

       thermald  [ OPTIONS ]

DESCRIPTION

       thermald is a Linux daemon used to prevent the overheating of platforms. This daemon monitors temperature
       and applies compensation using available cooling methods.

       By default, it monitors CPU temperature using available CPU digital temperature sensors and maintains CPU
       temperature under control, before HW takes aggressive correction action.

       Thermal  daemon  looks  for  thermal  sensors  and  thermal  cooling  drivers  in the Linux thermal sysfs
       (/sys/class/thermal) and builds a list of sensors and cooling drivers. Each of the  thermal  sensors  can
       optionally be binded to a cooling drivers by the in kernel drivers. In this case the Linux kernel thermal
       core  can  directly  take  actions  based  on the temperature trip points, for each sensor and associated
       cooling device. For example a trip temperature X in a sensor can be associates a  cooling  driver  Y.  So
       when the sensor temperature = X, the cooling driver "Y" is activated.

       Thermal  daemon  allows  one  to change this relationship or add new one via a thermal configuration file
       (thermal-conf.xml). This file is automatically created (thermal-conf.xml.auto) and used, if the  platform
       has ACPI thermal relationship table.  If not this needs to be manually configured.

       For manual configuration refer to the manual page of the thermal-conf.xml.

       In  some  newer  platforms the auto creation of the config file is done by a companion tool "dptfxtract".
       This tool can be downloaded from "https://github.com/intel/dptfxtract". It is suggested as parts  of  the
       install process, run dptfxtract.

       There  can  be multiple configuration files. User can select a configuration file via -config-file option
       to override the default selection. The default selection picks one of the file in the following order:

       - /etc/thermald/thermal-conf.xml.auto

       - /var/run/thermald/thermal-conf.xml.auto

       - /etc/thermald/thermal-conf.xml

       (*Assuming configure prefix=/ is used during build.)

       There is another companion tool "ThermalMonitor", which presents a graphical front end. This  allows  the
       monitoring  of  sensors  and  changing of thermal trips to give the user more control. The source code of
       "ThermalMonitor" is a part of the thermald github source, in the tools folder.

OPTIONS

       -h, --help
              Show help options.

       --version
              Print thermald version and exit.

       --no-daemon
              Don't become a daemon: Default is daemon mode.

       --loglevel=info
              log severity: info level and up.

       --loglevel=debug
              log severity: debug level and up: Max logging.

       --poll-interval
              Poll interval in seconds: Poll for zone temperature changes.  To disable  polling,  set  to  zero.
              Polling  can  only  be  disabled,  if  available temperature sensors can notify temperature change
              asynchronously.

       --dbus-enable
              Enable Dbus.

       --exclusive-control
              Act as exclusive thermal controller. This will use user-space governor for thermal sysfs and  take
              over control.

       --ignore-cpuid-check
              Ignore cpuid check for supported CPU models.

       --config-file
              Specify thermal-conf.xml path and ignore default thermal-conf.xml.

       --ignore-default-control
              Ignore default CPU temperature control. Strictly follow thermal-conf.xml or thermal-conf.xml.auto.
              --workaround-enabled  Enable  special workarounds. This is currently used for /dev/mem based power
              control.  --disable-active-power Disable active power management. This will not set  active  power
              limits.

SEE ALSO

       thermal-conf.xml(5)

                                                   8 May 2013                                        thermald(8)