Warning to users of Atmega 32U4 Boards like Leonardo/ Pro micro on Linux-IDE...

You can kill the bootloader of your Leonardo/ Pro micro if you program it with some Linux IDE!

Please consider this issue:

The solution is to remove/disable the modemmanager that interferes with the burning process.

I have now 3 embeded ProMicro boards that do not respond any more to serial.

I have probably got no way to restore their bootloader without desoldering them... :slight_smile:

Why desoldering them? If it is just bootloader it can be uploaded back via ISP. Neither new chip has a bootloader.

Budvar10:
Why desoldering them? If it is just bootloader it can be uploaded back via ISP. Neither new chip has a bootloader.

Desoldering the board, not the chip.
SPI is used...