USB Blaster JTAG chain broken

[Altera_Forum]

I'm using Ubuntu14.04 and quartus14.1. When I run jtagconfig, I get 

: $ jtagconfig  1) USB-Blaster [3-6]  Unable to read device chain - JTAG chain broken  The hardware is correct because I can read the JTAG chain using a old PC.  Some extra information:  $ cat /etc/udev/rules.d/51-usbblaster.rules# USB-Blaster # # from http://www.fpga-dev.com/altera-usb-blaster-with-ubuntu/ # For Altera USB-Blaster permissions. 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"  $ ls -l /etc/jtagd/pgm_parts.txt -rw-r--r-- 1 root root 921110 Jan 12 12:54 /etc/jtagd/pgm_parts.txt  I have also re-run: $ sudo udevadm control --reload  But nothing help!  Any tips?

[Altera_Forum]

Same configuration as yours. Probably same reason: http://askubuntu.com/questions/288821/how-do-i-resolve-a-cannot-open-shared-object-file-libudev-so-0-error 

     --- Quote Start ---  I'm using Ubuntu14.04 and quartus14.1. When I run jtagconfig, I get : $ jtagconfig  1) USB-Blaster [3-6]  Unable to read device chain - JTAG chain broken  The hardware is correct because I can read the JTAG chain using a old PC.  Some extra information:  $ cat /etc/udev/rules.d/51-usbblaster.rules# USB-Blaster # # from http://www.fpga-dev.com/altera-usb-blaster-with-ubuntu/ # For Altera USB-Blaster permissions. 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"  $ ls -l /etc/jtagd/pgm_parts.txt -rw-r--r-- 1 root root 921110 Jan 12 12:54 /etc/jtagd/pgm_parts.txt  I have also re-run: $ sudo udevadm control --reload  But nothing help!  Any tips?  --- Quote End ---  

[Altera_Forum]

Try do a "killall jtagd" see if it allowa jtagconfig to discover the on board chain.