Altera Cyclone II JTAG after AS Programming
I had the same or very similar problem (&quot;JTAG chain broken&quot;). It seems to solve the problem if I download libudev1:i386 and create a symbolic link
$ 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

Now it works:
$ jtagconfig
  1) USB-Blaster [2-4]
  020F70DD   EP3C120/EP4CE115