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FTDI device not recognized on Linux OS

Check the FTDI drivers installation #

If the Linux OS cannot detect the Digital Logic FTDI device, please check if you have installed the drivers properly.  Follow the FTDI drivers installation manual for your operating system and make sure you have selected the proper D2XX and VCP drivers for your hardware architecture.

Grant USB access to local users #

To grant the FTDI device access to the local users (user group), please download end execute the USB permissions script for Linux.

Blacklist the ftdi_sio and usbserial modules #

Check if  ftdi_sio and usbserial modules are loaded.  If so, disable them :

 –  – Module Size Used by
 –  – ftdi_sio 26993 0
 – – usbserial 21409 1 ftdi_sio
sudo rmmod ftdi_sio usbserial
sudo rmmod ftdi_sio usbserial

To make this change permanent, blacklist modules in the /modprobe.d/ftdi.conf file. 

Edit ftdi.conf file:

sudo vim /etc/modprobe.d/ftdi.conf

Add the following code and save the changes:

#disable auto load FTDI modules – D-LOGIC
blacklist ftdi_sio
blacklist usbserial