I can’t get arduino to flash on Ubuntu. I have installed 1.8.5 into /usr/local, and downloaded all the firmware, etc. Running ‘make flash’ fails with avrdude: ser_open(): can't open device "-b57600": No such file or directory the keyboard is apparently available on ttyACM0: [ 1328.524791] us…

Thank you. For the record, my problem was embarassingly simple - I wasn’t holding down the ‘Prog’ key…

Looking at that error message again, it’s clear that $DEVICE_PORT_BOOTLOADER didn’t get set, and that argument to avrdude was unquoted, so you got a cryptic error message. We can definitely improve the error reporting here.

Ubuntu: avrdude: ser_open():: can't open device "-b57600"

Help and Getting Started

rumpel February 24, 2018, 7:48pm 2

It’s a modem problem on Ubuntu. See here: Flashing problem on Ubuntu (SOLVED)

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Ubuntu: avrdude: ser_open():: can't open device "-b57600"

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