After upgrade to akonadi-server greater than 1.12.0, akonadi crashes on startup, rendering all akonadi dependent applications unusable. This includes Kontact and Kmail, which are essentials. By looking at the stack trace one has to assume the problem is either in QtCore or akonadi itself. Since QtCore was not changed during upgrade or downgrade it seems to be safe to guess the latter. Downgrade to 1.11.x makes it work again but blocks kde 4.13. I thought I file a bug even though KDE already has a bug on it ( https://bugs.kde.org/show_bug.cgi?id=332781 ) but have closed it without a solution. However, stacktrace and problem description are accurate. Reproducible: Always Steps to Reproduce: 1. behold akonadi not running in system tray after upgrade 2. enter "akonadictl start" 3. watch stacktrace and unsuccessful start sequence Actual Results: 0: akonadiserver(_Z11akBacktracev+0x37) [0x464b57] 1: akonadiserver() [0x464db2] 2: /lib64/libc.so.6(+0x35320) [0x7f7c023c9320] 3: /lib64/libc.so.6(gsignal+0x39) [0x7f7c023c92a9] 4: /lib64/libc.so.6(abort+0x148) [0x7f7c023ca608] 5: /usr/lib64/qt4/libQtCore.so.4(_Z17qt_message_output9QtMsgTypePKc+0x64) [0x7f7c03f300b4] 6: akonadiserver(_ZN15FileDebugStream9writeDataEPKcx+0x9d) [0x46710d] 7: /usr/lib64/qt4/libQtCore.so.4(_ZN9QIODevice5writeEPKcx+0xb0) [0x7f7c03fdd420] 8: /usr/lib64/qt4/libQtCore.so.4(_ZN11QTextStreamD1Ev+0x11e) [0x7f7c03ff844e] 9: akonadiserver(_ZN7Akonadi6Server13AkonadiServer4initEv+0x5fa) [0x46abfa] 10: /usr/lib64/qt4/libQtCore.so.4(_ZN7QObject5eventEP6QEvent+0x256) [0x7f7c0407d416] 11: /usr/lib64/qt4/libQtCore.so.4(_ZN16QCoreApplication14notifyInternalEP7QObjectP6QEvent+0x6d) [0x7f7c0405f4bd] 12: /usr/lib64/qt4/libQtCore.so.4(_ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData+0x1ed) [0x7f7c04063ddd] 13: /usr/lib64/qt4/libQtCore.so.4(+0x1da5b3) [0x7f7c040955b3] 14: /usr/lib64/libglib-2.0.so.0(g_main_context_dispatch+0x156) [0x7f7c020a44f6] 15: /usr/lib64/libglib-2.0.so.0(+0x52868) [0x7f7c020a4868] 16: /usr/lib64/libglib-2.0.so.0(g_main_context_iteration+0x2c) [0x7f7c020a490c] 17: /usr/lib64/qt4/libQtCore.so.4(_ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE+0x65) [0x7f7c04094675] 18: /usr/lib64/qt4/libQtCore.so.4(_ZN10QEventLoop13processEventsE6QFlagsINS_17ProcessEventsFlagEE+0x2f) [0x7f7c0405d5ff] 19: /usr/lib64/qt4/libQtCore.so.4(_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE+0x17d) [0x7f7c0405d8fd] 20: /usr/lib64/qt4/libQtCore.so.4(_ZN16QCoreApplication4execEv+0x8b) [0x7f7c04064c7b] 21: akonadiserver(main+0x1bf) [0x45e25f] 22: /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f7c023b5a65] 23: akonadiserver() [0x45e9d8] Expected Results: akonadi starts https://bugs.kde.org/show_bug.cgi?id=332781
*** This bug has been marked as a duplicate of bug 506608 ***