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OverviewFelgo Installation › Live server, client, apps hang in external monitor, Windows 10

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    The system is a Windows 10 laptop with a Thunderbolt 3 docking station with 2 higher resolution monitors connected by DP.  When Felgo was initially installed Qt Creator did not open as part of the installation and the Live server and client opened in ‘hung’ windows (not responding).  Through trial, determined that if the docking port was disconnected and Felgo installed with just the laptop, it installed, Qt Creator started as did the Live server and client.  Apps built also ran fine.  After turning the port back on, the Live server, the client or any running app moved to the external monitor would keep running.  However, any app started from these (like the Demos in Live server) would hang.  Adding to this, once any of these ‘hung’ in the external monitor, when restarting them from the laptop screen, they would attempt to open in the external monitor and hang.  Restarting was the only fix.

    One topic I found, suggested the usb display drivers for the docking station were the problem.  However, disconnecting the docking station and hooking one of the displays directly to the laptop via htmi resulted in the same behavior.

    The Advanced display settings in Windows shows all 3 monitors connect to the NVIDIA GeForce RTX 2070 Super video adapter.  Tried matching the resolution to the internal screen with no improvement.

    Advice from any video experts would be appreciated.  I did update the docking station firmware from the manufacturer’s site with no change.  The laptop is less than 2 months old.

    Also, Qt widget applications compile and run fine on any monitor.  However, QtQuick apps tested using the normal 15.5.4 license (not Felgo) demonstrate the same problems.  Hoping to do the qml work with Felgo.



    An update.  After experimenting discovered that making any monitor the Windows primary monitor allow that window to run the Live Server and apps.  Then any other windows causes them to hang.  Suggests to me that this is a Windows 10 issue, not any particular drivers.  I did update the NVIDIA drivers as a precaution but no change.


    Felgo Team

    Hi John,

    thanks a lot for this detailed report. To summarize, any QML application (default Qt, no Felgo) that you start on your non-primary monitor just hangs, while it runs fine if it is started on your primary monitor? Did you find any related Qt bug in the official Qt bug tracker or did you already file a bug yourself?


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