Auto running fan when turn on the Jetson Xavier

Hi all,

I want to make the fan running when the Jetson Xavier is switched on, but i didnt find how to this later, i’ve seen in the forums how to set value of PWM, but there is not a configuration to make an auto running fan when we turn the board.

Can u please gimme some suggestions ?


We already had a auto run configuration according to the thermal solution of our hardware. For example, when specific temperate got reached, fan would start spin in pwm=xxx value. And if the temp goes higher, pwm would set to higher value too.

If you don’t want to change it, then you can only set PWM to highest value in each time your system got boot.

Not sure which is the one you want.

Hi @WayneWWW,

Thank you for your answer, but i want to turn the fan when the jetson is switched on, from now this latter turn on when the temp exceed > 50C, but i want it to turn on at 255 PWM even if the temp is between 0 and 40C.


Which jetpack release are you using? As I remember, the temperature for fan to spin cannot be controlled by userspace in rel-32.x.

@WayneWWW i am using JetPack 4 3 (L4T 32.4.3), i want to do that because the jetson heats up to the temp > 50C and the fan doesn’t turn on so it shuts down, i’ve det FAN_MODE=cool, but it doesn’t solve the problem


Are you using nv devkit or some custom board? If this is devkit, could you also test some newer jetpack release and see if issue would be resolved?

Hi @WayneWWW,

I’m using the nvidia devkit, i’m using this version of L4T because it’s compatible with the custom camera driver i’m using.

I’m closing this topic due to there is no update from you for a period, assuming this issue was resolved.
If still need the support, please open a new topic. Thanks

Could you share your tegrastats before the device goes shutdown?