Tried it, doesn't fix plasmashell exploding (not in the particular test case presented anyway). A bit of research suggests that this type of issue has multiple causes and is in fact only fixed by a combination of multiple commits (see the code review tabs on the bug reports below). The last bug in particular seems to carry the majority of relevant patches.
https://bugreports.qt.io/browse/QTBUG-32973 https://bugreports.qt.io/browse/QTBUG-32681 https://bugreports.qt.io/browse/QTBUG-42985 I am not sure how to proceed on this. The additional patches seem to only affect qxcb such that they could only regress !phone apps (e.g. kubuntu-desktop). They are however numerous making this more work and more likely to cause regressions in other parts. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to qtdeclarative-opensource- src in Ubuntu. https://bugs.launchpad.net/bugs/1450137 Title: Qt5 applications crash when switching screens Status in qtdeclarative-opensource-src package in Ubuntu: Incomplete Status in qtdeclarative-opensource-src source package in Vivid: Confirmed Status in qtdeclarative-opensource-src source package in Wily: Incomplete Bug description: # Impact When switching screens (e. g. when putting the laptop onto the docking station the notebook screen is turned off and the external one is turned on) Qt5 applications (including plasmashell) quite often crash. # Test Case * Have two screens. One plugged-in one not * Run plasma 5 * Plug-in second screen and wait 10 seconds * Unplug and wait 10 seconds * Plug-in and wait 10 seconds * Unplug and wait 10 seconds * ... # Regression Potential Worst case scenario an application using qquickscreen would slow down because of erroneous screen change singals being emitted too often per second. This would however only reveal a lower level issue in the foundations that ultimately needs to be fixed anyway. # Other Info The upstream code review [1] explains the issue and solution pretty well. https://codereview.qt-project.org/#/c/111100/ --------- original report --------------- When switching screens (e. g. when putting the laptop onto the docking station the notebook screen is turned off and the external one is turned on) Qt5 applications (including plasmashell) quite often crash. This makes my laptop unusable, since I do that very frequently. The problem has already been described here: https://bugs.kde.org/show_bug.cgi?id=341497 Apparently it is fixed in Qt 5.5 I am running Kubuntu 15.04 64bit and libqt5gui5 5.4.1+dfsg-2ubuntu4. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qtdeclarative-opensource-src/+bug/1450137/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
