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  1. Qt
  2. QTBUG-74712

macOS Mojave 10.14.4: QtQuick windows flicker when activated

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    • macOS

      After updating to macOS 10.14.4 QtQuick based applications showing/hiding toplevel windows will cause all application windows to flicker.

      This seems to be independent of the GPU (reported on "NVIDIA GeForce GTX 775M", "Intel Iris Plus Graphics 655").

      There a more flicker problems that I've not yet been able to derive a test-case for but it seems all related to GL surface handling. None of this was a problem on 10.14.3.

      The following trivial example demonstrates the effect:

      import QtQuick 2.12
import QtQuick.Window 2.12
import QtQuick.Controls 2.12

Window {
  visible: true
  width: 640
  height: 480
  title: qsTr("Hello World")

  Button {
    text: "Show or Hide"
    onClicked: secondWindow.visible = !secondWindow.visible
  }

  Window {
    id: secondWindow
    width: 400
    height: 400
  }
}

        1. flicker.mov
          4.42 MB
        2. image-2019-07-15-12-32-04-673.png
          image-2019-07-15-12-32-04-673.png
          710 kB
        3. memleak.mp4
          3.72 MB
        4. qt-auto-flicker.mov
          2.07 MB
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            sorvig Morten Sørvig
            njeisecke Nils Jeisecke
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              Created:
              Updated:
              Resolved:

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