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  1. Qt
  2. QTBUG-42985

Qt GUI application disappear or crash when no screens are available

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    • cf1c4d810a043ca5fe60623569c131a2a7a417df f4b8697c40bd476ef6bf83418e144adce7c7d4a3 1f4b84f69f13edd10300d035321623291c5d073e a094af001795c9651b299d700a992150d1aba33a

    Description

      When I disconnect monitor or connect/disconnect another monitor then all Qt5 applications disappears(process exists, GUI does not) or crashes(depending on Qt version, compilation, etc). I think the bug is in QXcbConnection::updateScreens() when "has_randr_extension" is "true". After disconnecting a monitor it is removed from "m_screens". After connecting a monitor, it is not detected again. The list is empty, so GUI disappears. The method "QXcbConnection::sendConnectionEvent()" can also crash the application when "m_screens" is empty.

      The easiest way to reproduce the problem is:
      xrandr --output HDMI2 --off && xrandr --output HDMI2 --auto
      Replace "HDMI2" by your output name. It works with one monitor is connected. Not tested with more screens.

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        Issue Links

          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-44511 Qt is crashing, when one of the monitors is turned off or when the screen geometry is changed

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-45081 Crashes when swapping screens

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-45093 NULL dereference in QWidgetPrivate::drawWidget

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-47033 Crashing when waking up from suspend/laptop is undocked

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-47041 Changing the (only) active screen: Applications stop repainting, crashes on click exit

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-47385 Crash in XCB Backend after display turned off/on

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          is required for

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-48845 Issues to be fixed before Qt 5.6.0 RC

          • P0: Blocker - MUST be fixed ASAP. This includes issues that prevent/block further Qt development; Legal issues & Serious data loss issues.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-38326 Qt Creator window disappears when plugging out second monitor

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-40174 xrandr disabling the current screen results in qml applications crashing

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-75768 keepassxc: segfault at error 4 in libQt5WaylandClient

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-31389 "QXcbConnection: Failed to get the primary output of the screen" when launching applications when using X forwarding

          • 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-32567 Qt5: Signal QDesktopWidget::workAreaResized ( int screen ) does not work

          • 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-32973 Windows disappear when X monitor is disconnected

          • 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-44388 QXcbConnection::updateScreens accesses QGuiApplicationPrivate::platform_integration before it is constructed

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-40174 xrandr disabling the current screen results in qml applications crashing

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-48900 QtCreator crashes when changing screen resolutions

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-49450 libqt5xcbqpa5 SIGSEGV crashes sporadically at QXcbWindow::handleClientMessageEvent

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-44213 QScreen availableGeometry is incorrect after unplugging then plugging in primary monitor on Windows 7

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

          Bug - A problem which impairs or prevents the functions of the product. QTCREATORBUG-14406 Crash with multiple screens after entering power saving mode

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          For Gerrit Dashboard: QTBUG-42985
          # Subject Branch Project Status CR V
          87885,20 Handle gracefully the removal and re-attachment of all QScreens dev qt/qtbase Status: MERGED +2 0
          105171,8 Ensure QGuiApplicationPrivate::screen_list is correctly populated 5.5 qt/qtbase Status: MERGED +2 0
          107504,5 xcb: do not create a dummy QScreen when there are no outputs 5.5 qt/qtbase Status: MERGED +2 0
          108209,5 xcb: create a screen if dimensions are known but outputs are not 5.5 qt/qtbase Status: MERGED +2 0
          109485,1 xcb: more QXcbScreen null pointer checks 5.5 qt/qtbase Status: ABANDONED 0 0
          125095,3 xcb: fix yet another crash when screens are disconnected 5.6 qt/qtbase Status: MERGED +2 0
          125107,2 xcb: don't crash in mapToNative/mapFromNative if the screen is null 5.6 qt/qtbase Status: ABANDONED +2 0
          125540,4 QScreen manual test: don't crash when a QScreen is null 5.6 qt/qtbase Status: MERGED +2 0
          127142,1 Prevent crashing to _NET_WM_PING if screen is not attached 5.6 qt/qtbase Status: DEFERRED 0 0
          138201,28 xcb: Use a placeholder QScreen when there are no outputs connected 5.6 qt/qtbase Status: MERGED +2 0
          138879,7 Doc: a QScreen can be a placeholder if there are no screens attached 5.6 qt/qtbase Status: MERGED +2 0
          371170,4 xcb: convert last screen to fake when no screen dev qt/qtbase Status: MERGED +2 0

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              srutledg Shawn Rutledge
              zaps166 Błażej Szczygieł
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                Created:
                Updated:
                Resolved: