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QWebEngine Shows white screen occasionally

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  • nodeepshitN Offline
    nodeepshitN Offline
    nodeepshit
    wrote on last edited by
    #1

    Hi there,
    We are developing a windows desktop application that most business logic is accomplished with web pages which are embeded in QtWebEngine. In most cases, the app works well, but occasionally the web part shows white screen, it seems the QtWebEngine failed to rendering the web pages. We had tried some methods to avoid this problem, for example, listening to QWebEngineView::renderProcessTerminated signal, and reload web page. That solves some of white screen cases, some other cases there is no QWebEngineView::renderProcessTerminated signal.
    my question is:

    1. What situation might cause these white screen problem?
    2. Is there any way detect white screen event?
    3. If white screen occured, any way to recover?

    remark: we are using qt5.15.2 under windows 10.

    P 1 Reply Last reply
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    • Jarko VihrialaJ Offline
      Jarko VihrialaJ Offline
      Jarko Vihriala
      wrote on last edited by
      #2

      Hey,
      This sounds like a bug. Have you reported this into JIRA under QtWebEngine category? If not, please do and tell most precise steps to reproduce it.

      br,Jarko

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      • nodeepshitN nodeepshit

        Hi there,
        We are developing a windows desktop application that most business logic is accomplished with web pages which are embeded in QtWebEngine. In most cases, the app works well, but occasionally the web part shows white screen, it seems the QtWebEngine failed to rendering the web pages. We had tried some methods to avoid this problem, for example, listening to QWebEngineView::renderProcessTerminated signal, and reload web page. That solves some of white screen cases, some other cases there is no QWebEngineView::renderProcessTerminated signal.
        my question is:

        1. What situation might cause these white screen problem?
        2. Is there any way detect white screen event?
        3. If white screen occured, any way to recover?

        remark: we are using qt5.15.2 under windows 10.

        P Offline
        P Offline
        Patrick Freninger
        wrote on last edited by
        #3

        @nodeepshit
        We are having a similar issue: https://bugreports.qt.io/browse/QTBUG-99428

        1 Reply Last reply
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