Unsolved 【Error:qt.bluetooth: Dummy backend running】with Running Bluetooth Examples
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Qt5 version : 5.8.0
System : Ubuntu 16.04
bluetooth version : 5.37I am starting to do some work with QBluetooth, and find an example "Bluetooth Scanner Example", run it on ubuntu 16.04 .
Then the error is :
qt.bluetooth: Dummy backend running ; Qt Bluetooth module is non-functional -
@Alex_wang Try to start the app with QT_DEBUG_PLUGINS environment variable set:
QT_DEBUG_PLUGINS=1 && ./my_app
Then post the output. Most probably Bluez library is not installed on your machine.
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hi,
I try to run the app withQT_DEBUG_PLUGINS=1 && ./my_app
print is :
Unable to query physical screen size, defaulting to 100 dpi. To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters). qt.bluetooth: Dummy backend running. Qt Bluetooth module is non-functional.
And the bluez has been installed, I can use hciconfig hcitool to scan the devices.
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@Alex_wang You should have much more output when starting with QT_DEBUG_PLUGINS set.