Application: kdeinit5 ()

Qt Version: 5.5.1
Operating System: Linux 4.4.0-31-generic x86_64
Distribution: Ubuntu 16.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:

Login after lockscreen if monitor powered off leads to KCMinit crash.  Do not have the problem if screen locks for short periods.  Similar problem occurs after screenlock if I try logging in remotely using e.g. x2go.  

- Unusual behavior I noticed:

The crash can be reproduced every time.

-- Backtrace:
Application: KCMInit (kdeinit5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4d2c588740 (LWP 22474))]

Thread 2 (Thread 0x7f4d1823b700 (LWP 22476)):
#0  0x00007f4d2accee8d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4d2a39dc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f4d2a39f8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f4d1a5bd629 in QXcbEventReader::run (this=0xf0c7e0) at qxcbconnection.cpp:1253
#4  0x00007f4d2b04984e in QThreadPrivate::start (arg=0xf0c7e0) at thread/qthread_unix.cpp:331
#5  0x00007f4d28aab6fa in start_thread (arg=0x7f4d1823b700) at pthread_create.c:333
#6  0x00007f4d2acdab5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f4d2c588740 (LWP 22474)):
[KCrash Handler]
#6  XIFreeDeviceInfo (info=info@entry=0x0) at ../../src/XIQueryDevice.c:118
#7  0x00007f4d15983a5f in MouseSettings::apply (this=this@entry=0x7ffee56374b0, force=<optimized out>) at /build/plasma-desktop-Bvo2Ad/plasma-desktop-5.5.5/kcms/input/mouse.cpp:723
#8  0x00007f4d15986ed5 in MouseSettings::apply (this=this@entry=0x7ffee56374b0, force=force@entry=true) at /build/plasma-desktop-Bvo2Ad/plasma-desktop-5.5.5/kcms/input/mouse.cpp:727
#9  0x00007f4d15989ef1 in kcminit_mouse () at /build/plasma-desktop-Bvo2Ad/plasma-desktop-5.5.5/kcms/input/main.cpp:56
#10 0x00007f4d1a6789d0 in KCMInit::runModule (this=this@entry=0x7ffee56378b0, libName=..., service=...) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/startkde/kcminit/main.cpp:86
#11 0x00007f4d1a6791f6 in KCMInit::runModules (this=this@entry=0x7ffee56378b0, phase=phase@entry=0) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/startkde/kcminit/main.cpp:128
#12 0x00007f4d1a6799dd in KCMInit::KCMInit (this=0x7ffee56378b0, args=...) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/startkde/kcminit/main.cpp:204
#13 0x00007f4d1a67ab06 in kdemain (argc=1, argv=<optimized out>) at /build/plasma-workspace-kxRFE_/plasma-workspace-5.5.5.2/startkde/kcminit/main.cpp:268
#14 0x00000000004085ec in launch (argc=argc@entry=1, _name=_name@entry=0xea9741 "kcminit_startup", args=<optimized out>, args@entry=0x0, cwd=cwd@entry=0x0, envc=envc@entry=0, envs=<optimized out>, envs@entry=0x0, reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x40c030 "0") at /build/kinit-oVdCv3/kinit-5.18.0/src/kdeinit/kinit.cpp:747
#15 0x00000000004050d4 in main (argc=5, argv=<optimized out>) at /build/kinit-oVdCv3/kinit-5.18.0/src/kdeinit/kinit.cpp:1830

Possible duplicates by query: bug 358873, bug 356701.

Reported using DrKonqi