Trouble with USB on Arch Linux

[ytraub]

When I try to run my program using pybricksdev I get this error:

/home/usr/src/robotics/.venv/lib/python3.12/site-packages/asyncssh/crypto/cipher.py:29: CryptographyDeprecationWarning: ARC4 has been moved to cryptography.hazmat.decrepit.ciphers.algorithms.ARC4 and will be removed from this module in 48.0.0.
  from cryptography.hazmat.primitives.ciphers.algorithms import AES, ARC4
/home/usr/src/robotics/.venv/lib/python3.12/site-packages/asyncssh/crypto/cipher.py:30: CryptographyDeprecationWarning: TripleDES has been moved to cryptography.hazmat.decrepit.ciphers.algorithms.TripleDES and will be removed from this module in 48.0.0.
  from cryptography.hazmat.primitives.ciphers.algorithms import TripleDES
Searching for any hub with Pybricks service...
Traceback (most recent call last):
  File "/home/usr/src/robotics/.venv/bin/pybricksdev", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/home/usr/src/robotics/.venv/lib/python3.12/site-packages/pybricksdev/cli/__init__.py", line 389, in main
    asyncio.run(subparsers.choices[args.tool].tool.run(args))
  File "/usr/lib/python3.12/asyncio/runners.py", line 194, in run
    return runner.run(main)
           ^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/asyncio/runners.py", line 118, in run
    return self._loop.run_until_complete(task)
    
 File "/usr/lib/python3.12/asyncio/base_events.py", line 687, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "/home/usr/src/robotics/.venv/lib/python3.12/site-packages/pybricksdev/cli/__init__.py", line 192, in run
    device_or_address = await find_device(args.name)
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/usr/src/robotics/.venv/lib/python3.12/site-packages/pybricksdev/ble/__init__.py", line 63, in find_device
    device = await BleakScanner.find_device_by_filter(
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/usr/src/robotics/.venv/lib/python3.12/site-packages/bleak/__init__.py", line 444, in find_device_by_filter
    async with cls(**kwargs) as scanner:
  File "/home/usr/src/robotics/.venv/lib/python3.12/site-packages/bleak/__init__.py", line 158, in __aenter__
    await self._backend.start()
  File "/home/usr/src/robotics/.venv/lib/python3.12/site-packages/bleak/backends/bluezdbus/scanner.py", line 168, in start
    manager = await get_global_bluez_manager()
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/home/usr/src/robotics/.venv/lib/python3.12/site-packages/bleak/backends/bluezdbus/manager.py", line 1072, in get_global_bluez_manager
    await instance.async_init()
  File "/home/usr/src/robotics/.venv/lib/python3.12/site-packages/bleak/backends/bluezdbus/manager.py", line 300, in async_init
    assert_reply(reply)
  File "/home/usr/src/robotics/.venv/lib/python3.12/site-packages/bleak/backends/bluezdbus/utils.py", line 20, in assert_reply
    raise BleakDBusError(reply.error_name, reply.body)
bleak.exc.BleakDBusError: [org.freedesktop.DBus.Error.NameHasNoOwner] Could not activate remote peer 'org.bluez': activation request failed: unknown unit

Most likely its a driver problem but as I never had to deal with anything like this I would like to know if anybody has an Idea of how to resolve this. Thanks a lot and have a nice day!

[dlech]

It sounds like BlueZ (bluetoothd) is not install or it isn't set up correctly.

[ytraub]

Done that now i see:

/home/usr/src/robotics/.venv/lib/python3.12/site-packages/asyncssh/crypto/cipher.py:29: CryptographyDeprecationWarning: ARC4 has been moved to cryptography.hazmat.decrepit.ciphers.algorithms.ARC4 and will be removed from this module in 48.0.0.
  from cryptography.hazmat.primitives.ciphers.algorithms import AES, ARC4
/home/usr/src/robotics/.venv/lib/python3.12/site-packages/asyncssh/crypto/cipher.py:30: CryptographyDeprecationWarning: TripleDES has been moved to cryptography.hazmat.decrepit.ciphers.algorithms.TripleDES and will be removed from this module in 48.0.0.
  from cryptography.hazmat.primitives.ciphers.algorithms import TripleDES
Searching for any hub with Pybricks service...
Traceback (most recent call last):
  File "/home/usr/src/robotics/.venv/bin/pybricksdev", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/home/usr/src/robotics/.venv/lib/python3.12/site-packages/pybricksdev/cli/__init__.py", line 389, in main
    asyncio.run(subparsers.choices[args.tool].tool.run(args))
  File "/usr/lib/python3.12/asyncio/runners.py", line 194, in run
    return runner.run(main)
           ^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/asyncio/runners.py", line 118, in run
    return self._loop.run_until_complete(task)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/asyncio/base_events.py", line 687, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "/home/usr/src/robotics/.venv/lib/python3.12/site-packages/pybricksdev/cli/__init__.py", line 204, in run
    await hub.run(script_path, args.wait)
  File "/home/usr/src/robotics/.venv/lib/python3.12/site-packages/pybricksdev/connections/pybricks.py", line 572, in run
    mpy = await compile_multi_file(py_path, abi)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/usr/src/robotics/.venv/lib/python3.12/site-packages/pybricksdev/compile.py", line 141, in compile_multi_file
    mpy = await compile_file(relative_file, abi_major)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/usr/src/robotics/.venv/lib/python3.12/site-packages/pybricksdev/compile.py", line 53, in compile_file
    with open(path, "r") as f:
         ^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: 'main.py'`

[dlech]

Are you running pybricksdev in the same directory where main.py is located?

[ytraub]

Yes that's the solution for whatever reason it works on my windows machine even if i upload from a parent folder