Kvmd-otg can't write UDC

[finzzz]

I'm encountering this issue with nanopi running armbian jammy, this cause keyboard and mouse to not work. I'm not familiar with this, so not sure how to fix it.

[2022-12-31 22:11:37 kvmd-otg.service] --- kvmd.apps.otg                     INFO --- WRITE --- /sys/kernel/config/usb_gadget/kvmd/UDC
[2022-12-31 22:11:37 kvmd-otg.service] --- OSError: [Errno 16] Device or resource busy
[2022-12-31 22:11:37 kvmd-otg.service] --- During handling of the above exception, another exception occurred:
[2022-12-31 22:11:37 kvmd-otg.service] --- Traceback (most recent call last):
[2022-12-31 22:11:37 kvmd-otg.service] ---   File "/usr/bin/kvmd-otg", line 9, in <module>
[2022-12-31 22:11:37 kvmd-otg.service] ---     main()
[2022-12-31 22:11:37 kvmd-otg.service] ---   File "/usr/local/lib/python3.10/dist-packages/kvmd/apps/otg/__init__.py", line 347, in main
[2022-12-31 22:11:37 kvmd-otg.service] ---     options.cmd(config)
[2022-12-31 22:11:37 kvmd-otg.service] ---   File "/usr/local/lib/python3.10/dist-packages/kvmd/apps/otg/__init__.py", line 277, in _cmd_start
[2022-12-31 22:11:37 kvmd-otg.service] ---     _write(join(gadget_path, "UDC"), udc)
[2022-12-31 22:11:37 kvmd-otg.service] ---   File "/usr/local/lib/python3.10/dist-packages/kvmd/apps/otg/__init__.py", line 87, in _write
[2022-12-31 22:11:37 kvmd-otg.service] ---     with open(path, "w") as param_file:
[2022-12-31 22:11:37 kvmd-otg.service] --- OSError: [Errno 16] Device or resource busy

[finzzz]

Which also leads to this

FileExistsError: [Errno 17] File exists: '/sys/kernel/config/usb_gadget/kvmd

[hzyitc]

Which version do you use?

[finzzz]

Do you mean kvmd version? 3.142

[hzyitc]

Please reboot your system. And check again. kvmd-otg.service can't start twice.