Random encrypted text while trying to U-Boot


I was trying to install a new linux OS on my Apalis T30 using U-Boot.

I connected the board to my host machine using the method explained in the following official video by toradex: Using the Serial Console with Toradex Computer Modules - YouTube

But as soon as I type the following command : sudo minicom -D /dev/ttyUSB0
Continuous random text text gets displayed on the screen.

What could be the solution to this problem?


What is the baud rate setting confiured with minicom ? The default debug UART port is configured with 115200, 8N1 configuration. If baud rate configured is correct, then check your h/w connections.

rs232 levels?

I am encountering the same problem with Apalis IMX6 2GB board connected to Ixora carrier board.

Were you able to solve this issue ?


The baud rate is the same. 115200

no solutions yet. I am still waiting.

I don’t think this is related at all so please open a new question.

What exact carrier board are you talking about?

How exactly did you hook-up the serial debug port to your Linux workstation (any adaptors/cables)?

Are you sure it is on ttyUSB0?

Is your Colibri T30 module still booting? Then you could just check serial debug console output on a regular boot.

I am using IXORA-V1 apalis module and Apalis T30.
The circuit is as follows
*Serial to UART connected to UART-A of toradex
* USB to serial connected to host machine (linux computer)
* Null modem sandwiched between those two cables.
Yes, my colibri t30 is still booting. It has Angstrom linux installed on it. I want to replace it with arch-linux.

I followed the exact instruction as explained on this video https://www.youtube.com/watch?v=9IFUYdwotY8&t=67s

I am new to these terms. I think it is 8N1

Garbled characters on a serial line usually means that something is either electrically not connected right (wrong voltage level, bad ground or wrong pinout) or configured wrong in software.

Are you now taking about Apalis or Colibri T30?

I assume by UART-A you are talking about the Apalis UART1 e.g. as per the following. How exactly did you connect it? E.g. what adaptor cable did you use?

Please note that one can not simply run any other distribution on an Embedded Linux board as it requires a BSP which takes all the system’s hardware peculiarities into account.

Thank you for the reply.

Yes, it is Apalis t30. (Not colibri)
I connected with the exact cable provided in the toradex accessories kit. And i am following the exact procedures as explained in this official toradex video.

I connected with the following cables
DB9 RS232(uart1) to 10 pin + null modem + serial to usb.

If you are confident you plugged that all in properly (e.g. using correct 10 pin IDC pin header and pin number 1 alignment) let us assume your hardware connection is fine and proceed to the software and configuration side of things.

As already asked before: Are you sure it is on ttyUSB0?

Do you by any chance already know whether your USB-to-serial adaptor work or not?

You are using minicom with the exact same configuration as outlined in the video and mentioned e.g. here as well, correct?

Yes, I have followed the exact procedure as explained in that video. Except that I dont know if the apalis is configured to have Eboot as bootloader. It however has angstrom OS installed on it. I am able to connect it to a monitor and it works perfectly. We have 9 apalis board (purchased at 2015)

The wires and adapters came with the accessories bundle provided by toradex itself. I think that the wires are good (though i havent checked them using multimeter).

I think it is ttyUSB0. I had confirmed it by typing some commands on my linux terminal. Plus the ‘garbled-characters’ on minicom stops getting generated if I disconnect the adapter wire connecting apalis board to my computer.


The video does not explain the connection setup for Ixora. Please check the connection setup according to the getting started guide, especially the X22 connector orientation:


Otherwise posting a picture of your setup might help us to identify a problem.