Questions about fan speed

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

Dear Nvidia,

I know that we could use

echo 255 > /sys/kernel/debug/tegra_fan/target_pwm

to manually enable the fan on maximum speed.

However, I never seen the fan worked without this command,

So, my question is:
1 Could TX2 control its fan PWM automatically according to is temperature?
2 Could the process be self-defined or overwrite? How to achieve this?

Tanks

2

Hi nvidia13gmf, yes, by default the Jetson TX2 devkit will automatically turn on and control the fan PWM signal when the chip gets hot.

Have you ran a benchmark like CUDA n-body? The fan normally kicks on after a bit when the processor is under load.

3

Hi dusty_nv

i read the fan spec, this fan will output the fan frequency.

can Tegra TX2 read the fan speed?