Sending data to ttyAMA9 and ttyAMA10 during startup causes the system to go straight into the boot options

Robotics & Edge Computing Jetson Systems Jetson Thor
1

Hi, I ran into a problem while using Thor. Can you help me sort it out?

I’m currently using version 38.4.0 of the system.

Thor keeps sending data to the ttyAMA9 /ttyAMA10 interface through an external device during startup, causing the Thor system to go straight to the boot option selection and not be able to enter the system.

Below, I connected ttyAMA9/ttyAMA10 to the PC to take a look at the data coming from the ttyAMA9 interface.

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Can you tell me how I can turn off this output and make the ttyAMA9 and ttyAMA10 interfaces work like regular tty interfaces?

Thanks!

4

Hi 744159057,

Are you using the devkit or custom board for Thor?

The enabled UART interfaces will be added for console in UEFI.
Please simply disable the UARTs in UEFI-DTB and keep it enabled in Kernel-DTB.

5

HI KevinFFF

I found your previous reply to other questions, I’ll give it a try, thanks!

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6

Yes, please verify if it could help for your case.

7

Thanks, this really helps.