Arduino UNO R4 minima LIBUSB_ERROR_NOT_FOUND

Arduino Uno R4 minima
Fedora 41
Arduino IDE 2.3.4

Sketch uses 38820 bytes (14%) of program storage space. Maximum is 262144 bytes.
Global variables use 3940 bytes (12%) of dynamic memory, leaving 28828 bytes for local variables. Maximum is 32768 bytes.
dfu-util 0.11-arduino4

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2021 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to http://sourceforge.net/p/dfu-util/tickets/

Opening DFU capable USB device...
Device ID 2341:0069
Run-Time device DFU version 0101
Claiming USB DFU (Run-Time) Interface...
Setting Alternate Interface zero...
Determining device status...
DFU state(0) = appIDLE, status(0) = No error condition is present
Device really in Run-Time Mode, send DFU detach request...
Device will detach and reattach...
dfu-util: Lost device after RESET?
Failed uploading: uploading error: exit status 74

dfu-util: Lost device after RESET?

The device disappears, so dfu-util cannot do anything. This must be fixed in the Arduino IDE or bootloader.

dfu-util 0.11-arduino4

This is Arduino's own version of dfu-util. There seems to be a newer dfu-util 0.11-arduino5 out, you should try that also.

Now since you are on (Fedora) Linux, you should be able to follow what is happening, using journalctl -f or tail -f /var/log/syslog . You will probably see the USB device 2341:0069 appear, but then disconnect.

This is also interesting:

Claiming USB DFU (Run-Time) Interface...

This means the device is in Run-Time mode and not in bootloader (that would be DFU mode). I don't know anything about these devices so I don't know if this is intended.

Is another device showing up after the "DFU detach request" ?

Sri, I mistakenly thought it was you posting as anonymous above. Your original problem is the same as in https://sourceforge.net/p/dfu-util/tickets/207/ so I will close this ticket. You can reopen it if you have more information.

The anonymous posters can post in https://sourceforge.net/p/dfu-util/tickets/197