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  1. Qt
  2. QTBUG-111116

QT BLE scanner example causes high cpu usage

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    • Windows
    • 21
    • 4eac30923 (dev), fd9c9a6ea (6.5), c54f4e26a (tqtc/lts-6.2)
    • Foundation Sprint 76, Foundation Sprint 77, Foundation Sprint 78

      Using latest build of Windows 10 + Qt 6.4.2. Built and ran Qt Bluetooth Low Energy Scanner example. It's causing 100% cpu usage in process "Service Host: Device Association Service", makes the computer virtually unusable. The scan takes several minutes to complete and only addresses of BLE devices are displayed - not their names?

      OTOH, I tried sample Windows Universal Ble scanner. It doesn't result in high cpu usage, scan completes quickly and it also displays name of the ble peripheral.

      Considering QBluetooth in 6.4.2 uses winrt backend, such huge difference implies possible implementation bug in Qt?

      Link to Windows Official Ble Sample app: https://learn.microsoft.com/en-us/samples/microsoft/windows-universal-samples/bluetoothle/ 

      Note: Following errors are output when Qt Ble sample is run in debug mode.
       

      onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(297)\Windows.Devices.Bluetooth.dll!00007FF854E20C10: (caller: 00007FF854E20698) ReturnHr(1) tid(3c4c0) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(131)\Windows.Devices.Bluetooth.dll!00007FF854E206EC: (caller: 00007FF854E35B5A) ReturnHr(2) tid(3c4c0) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\device\bluetoothledevice.cpp(1597)\Windows.Devices.Bluetooth.dll!00007FF854E35B72: (caller: 00007FF854E30BC0) LogHr(1) tid(3c4c0) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(297)\Windows.Devices.Bluetooth.dll!00007FF854E20C10: (caller: 00007FF854E20698) ReturnHr(3) tid(39234) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(131)\Windows.Devices.Bluetooth.dll!00007FF854E206EC: (caller: 00007FF854E35B5A) ReturnHr(4) tid(39234) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\device\bluetoothledevice.cpp(1597)\Windows.Devices.Bluetooth.dll!00007FF854E35B72: (caller: 00007FF854E30BC0) LogHr(2) tid(39234) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(297)\Windows.Devices.Bluetooth.dll!00007FF854E20C10: (caller: 00007FF854E20698) ReturnHr(5) tid(3abdc) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(131)\Windows.Devices.Bluetooth.dll!00007FF854E206EC: (caller: 00007FF854E35B5A) ReturnHr(6) tid(3abdc) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\device\bluetoothledevice.cpp(1597)\Windows.Devices.Bluetooth.dll!00007FF854E35B72: (caller: 00007FF854E30BC0) LogHr(3) tid(3abdc) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(297)\Windows.Devices.Bluetooth.dll!00007FF854E20C10: (caller: 00007FF854E20698) ReturnHr(7) tid(3a834) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(131)\Windows.Devices.Bluetooth.dll!00007FF854E206EC: (caller: 00007FF854E35B5A) ReturnHr(8) tid(3a834) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\device\bluetoothledevice.cpp(1597)\Windows.Devices.Bluetooth.dll!00007FF854E35B72: (caller: 00007FF854E30BC0) LogHr(4) tid(3a834) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(297)\Windows.Devices.Bluetooth.dll!00007FF854E20C10: (caller: 00007FF854E20698) ReturnHr(9) tid(3b8ac) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(131)\Windows.Devices.Bluetooth.dll!00007FF854E206EC: (caller: 00007FF854E35B5A) ReturnHr(10) tid(3b8ac) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\device\bluetoothledevice.cpp(1597)\Windows.Devices.Bluetooth.dll!00007FF854E35B72: (caller: 00007FF854E30BC0) LogHr(5) tid(3b8ac) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(297)\Windows.Devices.Bluetooth.dll!00007FF854E20C10: (caller: 00007FF854E20698) ReturnHr(11) tid(39c60) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(131)\Windows.Devices.Bluetooth.dll!00007FF854E206EC: (caller: 00007FF854E35B5A) ReturnHr(12) tid(39c60) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\device\bluetoothledevice.cpp(1597)\Windows.Devices.Bluetooth.dll!00007FF854E35B72: (caller: 00007FF854E30BC0) LogHr(6) tid(39c60) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(297)\Windows.Devices.Bluetooth.dll!00007FF854E20C10: (caller: 00007FF854E20698) ReturnHr(13) tid(3830c) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(131)\Windows.Devices.Bluetooth.dll!00007FF854E206EC: (caller: 00007FF854E35B5A) ReturnHr(14) tid(3830c) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\device\bluetoothledevice.cpp(1597)\Windows.Devices.Bluetooth.dll!00007FF854E35B72: (caller: 00007FF854E30BC0) LogHr(7) tid(3830c) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(297)\Windows.Devices.Bluetooth.dll!00007FF854E20C10: (caller: 00007FF854E20698) ReturnHr(15) tid(393bc) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(131)\Windows.Devices.Bluetooth.dll!00007FF854E206EC: (caller: 00007FF854E35B5A) ReturnHr(16) tid(393bc) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\device\bluetoothledevice.cpp(1597)\Windows.Devices.Bluetooth.dll!00007FF854E35B72: (caller: 00007FF854E30BC0) LogHr(8) tid(393bc) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(297)\Windows.Devices.Bluetooth.dll!00007FF854E20C10: (caller: 00007FF854E20698) ReturnHr(17) tid(30940) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(131)\Windows.Devices.Bluetooth.dll!00007FF854E206EC: (caller: 00007FF854E35B5A) ReturnHr(18) tid(30940) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\device\bluetoothledevice.cpp(1597)\Windows.Devices.Bluetooth.dll!00007FF854E35B72: (caller: 00007FF854E30BC0) LogHr(9) tid(30940) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(297)\Windows.Devices.Bluetooth.dll!00007FF854E20C10: (caller: 00007FF854E20698) ReturnHr(19) tid(35a8c) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(131)\Windows.Devices.Bluetooth.dll!00007FF854E206EC: (caller: 00007FF854E35B5A) ReturnHr(20) tid(35a8c) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\device\bluetoothledevice.cpp(1597)\Windows.Devices.Bluetooth.dll!00007FF854E35B72: (caller: 00007FF854E30BC0) LogHr(10) tid(35a8c) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(297)\Windows.Devices.Bluetooth.dll!00007FF854E20C10: (caller: 00007FF854E20698) ReturnHr(21) tid(3ca50) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(131)\Windows.Devices.Bluetooth.dll!00007FF854E206EC: (caller: 00007FF854E35B5A) ReturnHr(22) tid(3ca50) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\device\bluetoothledevice.cpp(1597)\Windows.Devices.Bluetooth.dll!00007FF854E35B72: (caller: 00007FF854E30BC0) LogHr(11) tid(3ca50) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(297)\Windows.Devices.Bluetooth.dll!00007FF854E20C10: (caller: 00007FF854E20698) ReturnHr(23) tid(3d8ac) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\common\devquerydevpropprovider.cpp(131)\Windows.Devices.Bluetooth.dll!00007FF854E206EC: (caller: 00007FF854E35B5A) ReturnHr(24) tid(3d8ac) 80070490 Element not found.
onecoreuap\drivers\wdm\bluetooth\user\winrt\device\bluetoothledevice.cpp(1597)\Windows.Devices.Bluetooth.dll!00007FF854E35B72: (caller: 00007FF854E30BC0) LogHr(12) tid(3d8ac) 80070490 Element not found.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.
Exception thrown at 0x00007FF87DEFCD29 (KernelBase.dll) in lowenergyscanner.exe: WinRT originate error - 0x80010108 : 'The object invoked has disconnected from its clients.'.

       

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            ivan.solovev Ivan Solovev
            taytoo Mike Flanigan
            Vladimir Minenko Vladimir Minenko
            Alex Blasche Alex Blasche
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              Created:
              Updated:
              Resolved:

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