USB-Blaster: Unable to read device chain - JTAG chain broken

Hi,

if anyone encountered same problem, for me worked ( i'm using Ubuntu 20.4 and Quartus Prime Lite 21.1 )

->create new file in etc/udev/rules.d named 51-usbblaster.rules ( for me worked: sudo gedit 51-usbblaster.rules)

->copy this:

# USB Blaster
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="09fb", ATTR{idProduct}=="6001", MODE="0666", NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}", RUN+="/bin/chmod 0666 %c"
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="09fb", ATTR{idProduct}=="6002", MODE="0666", NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}", RUN+="/bin/chmod 0666 %c"
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="09fb", ATTR{idProduct}=="6003", MODE="0666", NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}", RUN+="/bin/chmod 0666 %c"

# USB Blaster II
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="09fb", ATTR{idProduct}=="6010", MODE="0666", NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}", RUN+="/bin/chmod 0666 %c"
SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="09fb", ATTR{idProduct}=="6810", MODE="0666", NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}", RUN+="/bin/chmod 0666 %c"

paste to file 51-usbblaster.rules , save and restart your computer

->if you don't have, install:

sudo apt-get install libxext6:i386
sudo apt-get install libxtst6:i386
sudo apt-get install libxi6:i386

->and install 32-bits version of libudev library

sudo apt-get install libudev1:i386

sudo ln -sf /lib/x86_64-linux-gnu/libudev.so.1 /lib/x86_64-linux-gnu/libudev.so.0

then it should work( for me it works )

Hope it helps someone.

Regrads

Halmon Celman