Uploaded image for project: 'Qt'
  1. Qt
  2. QTBUG-132430

Everything says "setHighDpiScaleFactorRoundingPolicy must be called before creating the QGuiApplication instance"

    XMLWordPrintable

Details

    • Suggestion
    • Resolution: Unresolved
    • P3: Somewhat important
    • None
    • 6.9
    • GUI: High-DPI
    • None

    Description

      Just run any Qt application, it'll say that. With debug:

      qt.highdpi: Initializing high-DPI scaling
      qt.highdpi: environment variable set: QT_SCALE_FACTOR_ROUNDING_POLICY "Floor"
      setHighDpiScaleFactorRoundingPolicy must be called before creating the QGuiApplication instance
      

      Environment:

      QT_AUTO_SCREEN_SCALE_FACTOR=0
      QT_SCALE_FACTOR_ROUNDING_POLICY=Floor
      

      Backtrace of the warning:

      #7  0x00007ffff65090e0 in QMessageLogger::warning (this=0x7fffffffd380, 
          msg=0x7ffff7b1f140 "setHighDpiScaleFactorRoundingPolicy must be called before creating the QGuiApplication instance")
          at /home/tjmaciei/src/qt/qt6/qtbase/src/corelib/global/qlogging.cpp:631
      #8  0x00007ffff724222c in QGuiApplication::setHighDpiScaleFactorRoundingPolicy (policy=Qt::HighDpiScaleFactorRoundingPolicy::Floor)
          at /home/tjmaciei/src/qt/qt6/qtbase/src/gui/kernel/qguiapplication.cpp:4011
      #9  0x00007ffff7264f28 in QHighDpiScaling::initHighDpiScaling () at /home/tjmaciei/src/qt/qt6/qtbase/src/gui/kernel/qhighdpiscaling.cpp:454
      #10 0x00007ffff7237075 in QGuiApplicationPrivate::createPlatformIntegration (this=0x55555558d1a0)
          at /home/tjmaciei/src/qt/qt6/qtbase/src/gui/kernel/qguiapplication.cpp:1499
      #11 0x00007ffff7237e65 in QGuiApplicationPrivate::createEventDispatcher (this=0x55555558d1a0) at /home/tjmaciei/src/qt/qt6/qtbase/src/gui/kernel/qguiapplication.cpp:1617
      #12 0x00007ffff65e8ef5 in QCoreApplicationPrivate::init (this=0x55555558d1a0) at /home/tjmaciei/src/qt/qt6/qtbase/src/corelib/kernel/qcoreapplication.cpp:878
      #13 0x00007ffff7237f83 in QGuiApplicationPrivate::init (this=0x55555558d1a0) at /home/tjmaciei/src/qt/qt6/qtbase/src/gui/kernel/qguiapplication.cpp:1645
      #14 0x00007ffff7231718 in QGuiApplication::QGuiApplication (this=0x7fffffffd9b0, argc=@0x7fffffffd99c: 1, argv=0x7fffffffdb50)
          at /home/tjmaciei/src/qt/qt6/qtbase/src/gui/kernel/qguiapplication.cpp:651
      

      Attachments

        No reviews matched the request. Check your Options in the drop-down menu of this sections header.

        Activity

          People

            sorvig Morten Sørvig
            thiago Thiago Macieira
            Votes:
            0 Vote for this issue
            Watchers:
            1 Start watching this issue

            Dates

              Created:
              Updated:

              Gerrit Reviews

                There are no open Gerrit changes