BT on Mac

[Rick Walsh]

On 27 September 2016 at 08:01, Thiago Macieira <thiago at macieira.org> wrote:

> On domingo, 25 de setembro de 2016 12:47:23 PDT Dirk Hohndel wrote:
> > So we now have a few reports that this isn’t working anymore…
> > I can reproduce things here but have no clue how to fix it.
> >
> > First I get this error
> >
> > QObject::connect: Cannot queue arguments of type 'QBluetoothServiceInfo'
> > (Make sure 'QBluetoothServiceInfo' is registered using
> qRegisterMetaType().)
>
> I remember seeing this elsewhere. It might be a Qt bug.
>
> > which appears to be caused by this code in qtserialbluetooth:
> >
> > #elif defined(Q_OS_ANDROID) || (QT_VERSION >= 0x050500 &&
> defined(Q_OS_MAC))
> > // Try to connect to the device using the uuid of the Serial Port Profile
> > service QBluetoothAddress remoteDeviceAddress(devaddr);
> >       serial_port->socket->connectToService(remoteDeviceAddress,
> > QBluetoothUuid(QBluetoothUuid::SerialPort));
> >       timer.start(msec);
> >       loop.exec();
>
> There's no QBluetoothServiceInfo in there. The only reference in the source
> code is
>
>      serial_port->socket = new
> QBluetoothSocket(QBluetoothServiceInfo::RfcommProtocol);
>
> I don't remember the Bluetooth code implementation anymore (even though I
> mentored the student who wrote it). Is the code in qtserialbluetooth.cpp
> running in an auxiliary thread, started by libdc?
>
> I've attached a blind attempt at fixing this. I have no idea if it helps
> in any
> way. It may make things even worse.
>
> Can you run with QT_FATAL_WARNINGS=1 and then give me the backtrace of that
> QObject::connect warning? (this requires that Qt print no other warnings
> before this one) My guess is that this is the emission of the
> QBluetoothServiceDiscoveryAgent::serviceDiscovered signal starting at
> QBluetoothServiceDiscoveryAgentPrivate::performMinimalServiceDiscovery.
>
> Did this get resolved?  It could be related to my friend's inability to
download from his Petrel 2 to his Macbook pro.
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