Branch dunfell after flash no micro USB is detected

[danny1209]

Hi,

I just compiled dunfell(L4T 32.7.3), the board can be rebooted successfully and I can see the GUI if it´s connected with monitor.
But no USB can be detected as usual

that means my Jetson Nano after reboot is isolated, not possible to communicate with the computer per ssh.

[ichergui]

Hey @danny1209
I don't understand your problem.
Do you mean that you are not able to access to the serial UART ? or you are not able to connect to your device via SSH ?
I'm seeing that you are using a virtual machine. Check the virtual machine settings.
BTW, I don't recommend to use a virtual machine to avoid this kind of issues.

[danny1209]

Hey @ichergui

thanks for your reply.
yes, it´s not able to access the serial UART.
VM works always well before. I did it before with L4T 32.7.2. Now I see it´s updated to 32.7.3. I´m not sure if it´s related.

[madisongh]

@danny1209 Sounds like you're expecting it to export USB gadgets after booting? If that's the case, double-check that you included l4t-usb-device-mode in your build, and if there, check the system logs on the Nano to see if the udev rules are getting invoked.

[danny1209]

Hi @madisongh
yes, it looks like this on my jetson nano

[madisongh]

Those are the USB host controller rules, not gadget rules. The l4t-usb-device-mode recipe installs a file called /etc/udev/rules.d/98-usb-gadget-tty.rules and a systemd service unit at /lib/systemd/system/usbgx.service.

[danny1209]

hi @madisongh
thanks a lot! I added the recipe l4t-usb-device-mode and this solved my problem.