USB Power Control

Autonomous Machines Jetson & Embedded Systems Jetson TX2
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Please check [Kernel Customization] in Documentation

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My fan doesn’t turn. I don’t know what’s wrong.is tx2 have Overheat protection

My fan turns on when it starts, and then it doesn’t turn. This problem occurred in the newly installed system.jetpack 3.3im use tx2 with J120and installed J120 drive of 1.6。
what’s the problem of tx2‘s fan

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The fan does not normally run. Unless the system produces enough heat it never kicks in (you might see a very slight flicker at the moment of power on). On the other hand, the J120 would require a different device tree, and if that isn’t correct, then the fan would not work. Unlike a desktop PC this wouldn’t be instant death, but it would end up overheating at some point during a heavy workload.

What do you see from:

sudo cat /sys/kernel/debug/tegra_fan/target_pwm

A “0” is auto speed control. This would force the fan to max:

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

This would put the fan back into auto mode:

sudo echo 0 > /sys/kernel/debug/tegra_fan/target_pwm

If the device tree is not in, then either the files won’t exist or won’t do as expected.

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