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  1. Qt
  2. QTBUG-33062

Windows: When switching users while a QGLWidget is still visible then it can cause a crash when the user comes back

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Details

    • Bug
    • Resolution: Done
    • P2: Important
    • 5.2.0
    • 5.1.0
    • GUI: Window management
    • None
    • Windows
    • 4e043026725b1dfd201bf432bdd0b28ba8867196, 9194fc00a61379fa9ccd4b05c480f67b2fb739bc, f738a4a5d5f62c1136b5820a89c9b47080d150a4

    Description

      Windows: When switching users while a QGLWidget is still visible then it can cause a crash when the user comes back. The reason it crashes is because the QPlatformWindow for the QGLWidget has been deleted (due to the top level one being recreated) but it has not been recreated at this point. Therefore when it goes to flush the backing store it will crash as it cannot get the HDC for the deleted QPlatformWindow.

      I reproduced this using the hellogl_es2 example and doing the following:

      1) Run the example
      2) CTRL+ALT+DEL and select switch user
      3) Just pick the same user (you don't actually need to switch, as long as the switch user is triggered)
      4) The app will crash

      If it does not crash, then try on a higher resolution such as 1920x1080.

      Attachments

        1. screenchange_stack.txt
          2 kB
        2. stack.txt
          2 kB
        3. diag.patch
          5 kB
        4. log.txt
          49 kB

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-32681 Crash after disconnecting monitor

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-38216 Windows: Crash in windows tablet support after lock screen (Switch user)

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-29223 QtQuick 2.0 view crash after Windows security dialog (Ctrl+Alt+Del)

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-38167 OpenGL scene not updated after login on Windows 8 (examples\widgets\graphicsview\boxes)

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
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            People

              kleint Friedemann Kleint
              andysh Andy Shaw
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              Dates

                Created:
                Updated:
                Resolved:

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