Alchitry Loader - Could not detect an Alchitry Au

I’m encountering the same problem on Ubuntu 20.04. After reading this thread, I have checked using FT_Prog on a Windows 10 machine that the FTDI chip is programmed and has “Alchitry Au” as product description.

This usually has to do with the FTDI SIO driver taking over and blocking Alchitry Labs from getting access.

You should be able to fix this by adding a Udev rule.

Create the file /etc/udev/rules.d/99-alchitry.rules and add the following to it.

[code]SUBSYSTEM!=“usb|usb_device”, GOTO=“ft2232_rules_end”
ACTION!=“add”, GOTO=“ft2232_rules_end”

ATTRS{idVendor}==“0403”, ATTRS{idProduct}==“6010”, RUN+=“/bin/sh -c ‘echo $kernel > /sys/bus/usb/drivers/ftdi_sio/unbind’”, MODE=“0666”, GROUP=“dialout”, ENV{ID_MM_DEVICE_IGNORE}=“1”


This requires that you have a group named “dialout” and that your user account is a member of it.