I think it only depends on whether opengl acceleration is enabled whether you get the former or latter behavior.
** No longer affects: libxcb (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to libxcb in Ubuntu. https://bugs.launchpad.net/bugs/1318584 Title: qt crashed when switching video out mode to external or internal only mode Status in Checkbox - Graphical Test Runner: Confirmed Status in OEM Priority Project: Confirmed Status in OEM Priority Project trusty series: New Status in Qt: New Status in “qtbase-opensource-src” package in Ubuntu: Confirmed Bug description: checkbox-gui crashed with following console outputs: pure virtual method called terminate called without an active exception Aborted (core dumped) Steps to reproduce: 1. open checkbox-gui 2. connected external display 3. switch video output mode, usually by using the common video output switch hotkey. Expected result: checkbox-gui still running when switching back to extended desktop video out mode. Actual result: checkbox-gui crashed --- https://bugreports.qt-project.org/browse/QTBUG-39663 To manage notifications about this bug go to: https://bugs.launchpad.net/checkbox-gui/+bug/1318584/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
