RuntimeError: Root permission needed by the library

Support
1

Hi all,

I am trying to download the finn examples here. GitHub - Xilinx/finn-examples: Dataflow QNN inference accelerator examples on FPGAs
However, I get stuck at this particular step:
pynq get-notebooks --from-package finn-examples -p .
And got this error message:

Traceback (most recent call last):
  File "/usr/local/bin/pynq-get-notebooks", line 8, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.6/dist-packages/pynq/_cli/get_notebooks.py", line 154, in main
    device = _detect_devices(active_only=True)
  File "/usr/local/lib/python3.6/dist-packages/pynq/utils.py", line 162, in _detect_devices
    devices = Device.devices
  File "/usr/local/lib/python3.6/dist-packages/pynq/pl_server/device.py", line 79, in devices
    cls._devices.extend(DeviceMeta._subclasses[key]._probe_())
  File "/usr/local/lib/python3.6/dist-packages/pynq/pl_server/device.py", line 677, in _probe_
    return [XlnkDevice()]
  File "/usr/local/lib/python3.6/dist-packages/pynq/pl_server/device.py", line 686, in __init__
    self.default_memory = Xlnk()
  File "/usr/local/lib/python3.6/dist-packages/pynq/xlnk.py", line 137, in __init__
    raise RuntimeError("Root permission needed by the library.")
RuntimeError: Root permission needed by the library.
Exception ignored in: <bound method Xlnk.__del__ of <pynq.xlnk.Xlnk object at 0x7faae99f28>>
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/dist-packages/pynq/xlnk.py", line 154, in __del__
    for key in self.bufmap.keys():
AttributeError: 'Xlnk' object has no attribute 'bufmap'

I have tried adding sudo which I can load the notebook successfully. But it doesnt work when I try to run the jupyter notebook itself (tried adding --allow-root) and it gives me the same error. I am login to the board as xilinx and not allowed to use root.

PYNQ version 2.6.0
Git Id: 56d3c1ba60d24160a946551f0b82711660ac71ca
Board: Ultra96-v2
Architecture: aarch64
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 1
Core(s) per socket: 4
Socket(s): 1
Vendor ID: ARM
Model: 4
Model name: Cortex-A53
Stepping: r0p4
CPU max MHz: 1199.9990
CPU min MHz: 299.9990
BogoMIPS: 199.99
Flags: fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid

2

Some libraries like memory map require root permission. So please follow the instructions and use sudo for now. It may be an improvement to allow non-sudo behavior but that is not on our priority list now.

3

sudo didn’t work
Jupyter notebook itself blocks sudo usage