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  1. Qt
  2. QTBUG-76813

Backingstore warning messages are shown when starting animations

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Details

    • Bug
    • Status: Closed
    • P2: Important
    • Resolution: Fixed
    • 5.12.5, 5.13.0, 5.13.1, 5.13.2, 5.14.0 Beta 1
    • 5.12.6, 5.14.0 Beta2
    • QPA: Wayland
    • 9f5b96225885f927727a57b6123d8550d6c373bb (qt/qtwayland/5.15) 03e8c91fc28b77c4f027b6c6d582b85878efae41 (qt/qtwayland/5.12.6)

    Description

      In the attached example the following warning message is shown every time the user clicks on the window (running inside pure-qml):

      qt.qpa.wayland.backingstore: Delivering update request through fallback timer, may not be in sync with display

      The code changes the opacity of the "sign" element on every click and uses a behavior to animate it.

      The warning is only shown when the "threaded" render loop is used.

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        Issue Links

          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. AUTOSUITE-1021 Lots of qt.qpa.wayland.backingstore warnings

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed
          resulted in

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-82163 [REG: 5.12.3 ->5.12.6] Running animation on i.MX6 starts to get stuttered with CPU load 100%

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          For Gerrit Dashboard: QTBUG-76813
          # Subject Branch Project Status CR V
          277337,2 Client: Fix 100ms freeze when applications do not swap after deliverUpdateRequest 5.12 qt/qtwayland Status: MERGED +2 0
          277546,3 Client: Fix 100ms freeze when applications do not swap after deliverUpdateRequest 5.13 qt/qtwayland Status: MERGED +2 0

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            People

              johanhelsing Johan Helsing
              gagi Dominik Holland
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              Dates

                Created:
                Updated:
                Resolved:

                Gerrit Reviews

                  There are no open Gerrit changes