Crash "ksmserver-logout-greeter" or other KDE packages plasma after an update

[Emanuele]

I do not know which package is causing the problem, so I assigned it to "kubuntu-desktop".
It is a problem that has been repeating for a long time (kubuntu 18.04, 18.10 and 19.04), every time I update (I do not know exactly which package causes the problem) when I click on "restart" or "switch off" the "ksmserver-logout-greeter" "crashes, so to reboot or shut down I have to type from the terminal: sudo systemctl reboot.
Trying to start "plasma-discover" crashes as well.
I enclose all the logs that created the error reporting software.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: kubuntu-desktop 1.383
ProcVersionSignature: Ubuntu 4.19.0-13.14-generic 4.19.20
Uname: Linux 4.19.0-13-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.10-0ubuntu21
Architecture: amd64
CurrentDesktop: KDE
Date: Sat Feb 23 15:59:39 2019
InstallationDate: Installed on 2019-02-18 (4 days ago)
InstallationMedia: Kubuntu 19.04 "Disco Dingo" - Alpha amd64 (20190130)
SourcePackage: kubuntu-meta
UpgradeStatus: No upgrade log present (probably fresh install)

[Emanuele (emanuc)]

APT history of packages updated before the crash.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Радогор (igor0386)]

I have the same issue. But reboot is fix it.

[Mike Robinson (launchpad-multiwebinc)]

I think this problem started happening for me after adding the repository ppa:graphics-drivers/ppa and installing the packages nvidia-driver-440 libnvidia-gl-440 libnvidia-gl-440:i386 libvulkan1 libvulkan1:i386. Here's the generated crash information:

Application: ksmserver-logout-greeter (ksmserver-logout-greeter), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f5cbc9713c0 (LWP 29214))]

Thread 4 (Thread 0x7f5c9938d700 (LWP 29253)):
#0 0x00007f5cb800fbf9 in __GI___poll (fds=0x7f5c8c004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007f5cb0e365c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f5cb0e366dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007f5cb89588ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4 0x00007f5cb88fd90a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x00007f5cb871c23a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6 0x00007f5cba9846f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7 0x00007f5cb872117d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8 0x00007f5cb7adf6db in start_thread (arg=0x7f5c9938d700) at pthread_create.c:463
#9 0x00007f5cb801c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f5c9be17700 (LWP 29243)):
#0 0x00007f5cb800fbf9 in __GI___poll (fds=0x7f5c9401b910, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007f5cb0e365c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f5cb0e366dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007f5cb89588ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4 0x00007f5cb88fd90a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x00007f5cb871c23a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6 0x00007f5cb953ed45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7 0x00007f5cb872117d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8 0x00007f5cb7adf6db in start_thread (arg=0x7f5c9be17700) at pthread_create.c:463
#9 0x00007f5cb801c88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f5ca63cf700 (LWP 29226)):
#0 0x00007f5cb800fbf9 in __GI___poll (fds=0x7f5ca63cec68, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007f5cb2d8f747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2 0x00007f5cb2d9136a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3 0x00007f5ca8b525e9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4 0x00007f5cb872117d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x00007f5cb7adf6db in start_thread (arg=0x7f5ca63cf700) at pthread_create.c:463
#6 0x00007f5cb801c88f in clone () at ../sysdeps/unix/sysv/li...

[Mike Robinson (launchpad-multiwebinc)]

Correction: I think it was when I updated those packages or their dependencies (not installed) and didn't reboot. A reboot fixed the issue.

[Joey (sealtech)]

I experienced the same issue after going to launcher > leave > reboot after rebooting from CLI I cannot recreate

The packages containing debug information for the following application and libraries are missing:

/usr/lib/x86_64-linux-gnu/libexec/ksmserver-logout-greeter
/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
/lib/x86_64-linux-gnu/libQt5Core.so.5
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
/lib/x86_64-linux-gnu/libQt5Gui.so.5
/lib/x86_64-linux-gnu/libQt5Quick.so.5

[Joey (sealtech)]

^^^^^^^ Kubuntu 20.04 (opps)

[Mark Fraser (launchpad-mfraz)]

Happens to me whenever I have an update that involves nvidia drivers. The only way to shutdown or reboot is via the CLI.