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`muselsl` connects, but does not stream data on ubuntu

See original GitHub issue

Hi, first of all thanks for the project! There’s not much out there on getting streaming data from 2016 headsets, so it’s much appreciated.

I’m using ubuntu + BLED112 and trying to stream EEG data. I can get to the point of pairing/connecting, but muselsl automatically disconnects because it doesn’t get any data:

$ muselsl stream --address 00:55:DA:B0:8E:E7 --backend bgapi
Connecting to Muse : 00:55:DA:B0:8E:E7...
Connected.
Streaming...
Timestamp 1533395995.9020605
^CTraceback (most recent call last):
  File "/home/ysimonson/skull/venv/bin/muselsl", line 11, in <module>
    sys.exit(main())
  File "/home/ysimonson/skull/venv/lib/python3.6/site-packages/muselsl/__main__.py", line 51, in main
    cli = CLI(args.command)
  File "/home/ysimonson/skull/venv/lib/python3.6/site-packages/muselsl/cli.py", line 9, in __init__
    getattr(self, command)()
  File "/home/ysimonson/skull/venv/lib/python3.6/site-packages/muselsl/cli.py", line 42, in stream
    args.interface, args.name)
  File "/home/ysimonson/skull/venv/lib/python3.6/site-packages/muselsl/stream.py", line 116, in stream
    muse.stop()
  File "/home/ysimonson/skull/venv/lib/python3.6/site-packages/muselsl/muse.py", line 204, in stop
    self._write_cmd([0x02, 0x68, 0x0a])
  File "/home/ysimonson/skull/venv/lib/python3.6/site-packages/muselsl/muse.py", line 123, in _write_cmd
    self.device.char_write_handle(0x000e, cmd, False)
  File "/home/ysimonson/skull/venv/lib/python3.6/site-packages/pygatt/backends/bgapi/device.py", line 21, in wrapper
    return func(self, *args, **kwargs)
  File "/home/ysimonson/skull/venv/lib/python3.6/site-packages/pygatt/backends/bgapi/device.py", line 116, in char_write_handle
    EventPacketType.attclient_procedure_completed)
  File "/home/ysimonson/skull/venv/lib/python3.6/site-packages/pygatt/backends/bgapi/bgapi.py", line 521, in expect
    return self.expect_any([expected], *args, **kargs)
  File "/home/ysimonson/skull/venv/lib/python3.6/site-packages/pygatt/backends/bgapi/bgapi.py", line 557, in expect_any
    raise exc
pygatt.backends.bgapi.exceptions.ExpectedResponseTimeout: Timed out after 1.000000s waiting for [<EventPacketType.attclient_procedure_completed: 17>]

As far as I’ve seen, this hasn’t come up before with linux + BLED112 since it’s the blessed solution. Is there something obvious I’m missing?