I used to be able to program this arduino board (pro micro; also known as leonardo). However; i'm unable to access it from usb using archlinux anymore.

I used to use avrdude -p atmgea34u4 -P "$(ls /dev/ttyACM*)" -c avr109 -D -U flash:w:myhexfile.hex to flash; and when i put the board in bootloader mode it would appear as /dev/ttyACM0. It has caterina bootloader. I tried to again and I cannot see the device in /dev anymore while in bootloader mode.

Did anyone run into similar issues with arduino boards? I can flash other devices with dfu just fine.