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  1. Qt
  2. QTBUG-67808

Sluggish behavior when positioning Qt Window on secondary screen on Mac

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: Not Evaluated Not Evaluated
    • 5.10
    • 5.5.1
    • QPA
    • None
    • Mac OS High Sierra on different Macs (Minis, MacBooks, Pros)
    • macOS

      When multiple screens are connected to a Mac, we see high CPU consumption by the Qt app (and the Qt app becomes less responsive) when a Qt app window is positioned on a secondary screen.

      This does not happen if the Qt app windows are on the main screen.

      The attachments contain sampling results for the two conditions.

        1. with_hdmi_screen_sample.txt
          754 kB
        2. with_main_screen_sample.txt
          824 kB
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            qt.team.graphics.and.multimedia Qt Graphics Team
            devendraparakh Devendra Parakh
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              Created:
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              Resolved:

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