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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

DE10 Nano kit - mini USB OTG without 5V?

I just received my DE10 Nano. Boot it up with the default linux on the sd card works fine. However I am unable to use any usb client devices (mouse, keyboard) plugged in to the OTG port. They only ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

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How to disable the USB gadget before I cannot use mouse and keyboard control the Desktop?

I have tried to disable it in command line but it told me that "QXcbConnection: Could not connect to display"......

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Try this command when logged in using the serial port as root, then reboot or power-cycle:

root@de10-nano:/bin# cd /bin

root@de10-nano:/bin# ./systemctl disable de10-nano-gadget-init.service

Removed /etc/systemd/system/basic.target.wants/de10-nano-gadget-init.service.

root@de10-nano:/bin#
  • alid's avatar
    alid
    Icon for New Contributor rankNew Contributor
    5 years ago

    To add, using serial port (connecting the mini-USB port called 'UART to USB' to computer and running a program like Tera Term ) to log in and running the command above solved my problem.

    Serial port parameters (couldn't find them in manual): 115200, 8 bit, no parity, 1 stop bit, no flow control.

    Also, despite what manual says, there is no password for root.

    Hope this helps new users running into this issue.