sensors-detect - detect hardware monitoring chips
sensors-detect is an interactive program that will walk you through the
process of scanning your system for various hardware monitoring chips,
or sensors, supported by libsensors(3), or more generally by the
lm_sensors tool suite.
sensors-detect will look for the following devices, in order:
· Sensors embedded in CPUs, south bridges and memory controllers.
· Sensors embedded in Super I/O chips.
· Hardware monitoring chips accessed through ISA I/O ports.
· Hardware monitoring chips reachable over the SMBus or more
generally any I2C bus on your system.
As the last two detection steps can cause trouble on some systems, they
are normally not attempted if the second detection step led to the
discovery of a Super I/O chip with complete hardware monitoring
features. However, the user is always free to ask for all detection
steps if so is his/her wish. This can be useful if a given system has
more than one hardware monitoring chip. Some vendors are known to do
this, most notably Asus and Tyan.
sensors-detect needs to access the hardware for most of the chip
detections. By definition, it doesn’t know which chips are there
before it manages to identify them. This means that it can access chips
in a way these chips do not like, causing problems ranging from SMBus
lockup to permanent hardware damage (a rare case, thankfully.)
The authors made their best to make the detection as safe as possible,
and it turns out to work just fine in most cases, however it is
impossible to guarantee that sensors-detect will not lock or kill a
specific system. So, as a rule of thumb, you should not run sensors-
detect on production servers, and you should not run sensors-detect if
can’t afford replacing a random part of your system. Also, it is
recommended to not force a detection step which would have been skipped
by default, unless you know what you are doing.
Frodo Looijaard and Jean Delvare