Start Kmail It crashes every time saying akonadi_control crashed I am using KDE neon 18.04 No LSB modules are available. Distributor ID: neon Description: KDE neon User Edition 5.15 Release: 18.04 Codename: bionic Linux zalman 4.15.0-45-generic #48-Ubuntu SMP Tue Jan 29 16:28:13 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux konsole 18.12.2 QMake version 3.1 Using Qt version 5.12.0 in /usr/lib/x86_64-linux-gnu kmail --version kmail2 5.10.2 the backtrace Application: akonadi_control (akonadi_control), signal: Aborted Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [Current thread is 1 (Thread 0x7f2260813800 (LWP 2733))] Thread 2 (Thread 0x7f22537f4700 (LWP 2734)): #0 0x00007f225e292bf9 in __GI___poll (fds=0x7f22537f3cb8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f225a773747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1 #2 0x00007f225a77536a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1 #3 0x00007f22563b6d4a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #4 0x00007f225ebb7bc2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f225df666db in start_thread (arg=0x7f22537f4700) at pthread_create.c:463 #6 0x00007f225e29f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 1 (Thread 0x7f2260813800 (LWP 2733)): [KCrash Handler] #6 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51 #7 0x00007f225e1be801 in __GI_abort () at abort.c:79 #8 0x00007f225eb93e7b in QMessageLogger::fatal(char const*, ...) const () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #9 0x00005641fea8362f in akInit (appName=...) at ./src/shared/akdebug.cpp:206 #10 0x00005641fea81762 in AkApplicationBase::init (this=0x7fffd5079f20) at ./src/shared/akapplication.cpp:62 #11 0x00005641fea62138 in AkApplicationImpl<QGuiApplication>::AkApplicationImpl (loggingCategory=..., argv=0x7fffd507a088, argc=@0x7fffd5079e9c: 1, this=0x7fffd5079f20) at ./src/shared/akapplication.h:83 #12 main (argc=<optimized out>, argv=0x7fffd507a088) at ./src/akonadicontrol/main.cpp:55
*** This bug has been marked as a duplicate of bug 392092 ***