jtag issues De0-nano-soc

I've tried this on three machines with no luck soooo...

Current Platform Quartus 15.1 / CentOS release 6.7

I've downgraded this box from usb xhci which had issues

Now - as root

# jtagd --foreground --debug

JTAG daemon started

Using config file /etc/jtagd/jtagd.conf

Remote JTAG permitted when password set

USB-Blaster firmware download ok (23ms)

USB-Blasters reconfigured, waiting for them to come back

USB-Blaster "DE-SoC" firmware version 1.35

USB-Blaster endpoints out=04(512), in=88(512); urb size=4096

USB-Blaster firmware for 09FB/6010 is version 1.35

USB-Blaster added "DE-SoC [2-1]"

Device /dev/bus/usb/002/036 remove

Device /dev/bus/usb/002/037 add

and as soon as i run

#jtagconfig

1) DE-SoC [2-1]

Unable to lock chain - Hardware not attached

this is nonsense as above it found the firmware ver ....

& the debug stream says :

USB-Blaster port (/dev/bus/usb/002/037) can't reset interface (71)

USB-Blaster port (/dev/bus/usb/002/037) can't reset interface (71)

permissions are wide open

crwxrwxrwx. 1 root root 189, 162 Jul 19 20:08 /dev/bus/usb/002/037

I have 'occasionally ' got jtagconfig to recognize the chips on the board but as soon as i try writing / query from SignalTap it complains the same refrain:

"Unable to lock chain - Hardware not attached"

works fine with a DE0-nano ...

so any clues ? --

I've pretty much debuged with a external logic analyser( and printf) till now

... but that is getting difficult for many aspects ....