Public bug reported: On Kubuntu 20.04 Focal Fossa fresh installed using March 26th amd64 daily image and updated using Discover. I expected the virtual desktop options to display in the system setttings window, however I could not set the number of virtual desktops before system settings crashed.
Version: apt-cache policy systemsettings systemsettings: Installed: 4:5.18.3-0ubuntu1 Candidate: 4:5.18.3-0ubuntu1 Version table: *** 4:5.18.3-0ubuntu1 500 500 http://us.archive.ubuntu.com/ubuntu focal/universe amd64 Packages 100 /var/lib/dpkg/status Backtrace: Application: System Settings (systemsettings5), signal: Segmentation fault Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [Current thread is 1 (Thread 0x7f8a19a9c800 (LWP 3130))] Thread 6 (Thread 0x7f8a01a0a700 (LWP 3143)): #0 __GI___libc_read (nbytes=16, buf=0x7f8a01a09b70, fd=31) at ../sysdeps/unix/sysv/linux/read.c:26 #1 __GI___libc_read (fd=31, buf=0x7f8a01a09b70, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24 #2 0x00007f8a1bccd89f in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f8a1bc84cfe in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #4 0x00007f8a1bc85152 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #5 0x00007f8a1bc852e3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #6 0x00007f8a1df458c3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #7 0x00007f8a1deec82b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f8a1dd25775 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #9 0x00007f8a1cfdb3a9 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5 #10 0x00007f8a1dd269c2 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #11 0x00007f8a1c569609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #12 0x00007f8a1d9b7153 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 5 (Thread 0x7f8a08f03700 (LWP 3134)): #0 0x00007f8a1bcd233d in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #1 0x00007f8a1bc84d6a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f8a1bc85240 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f8a1bc852e3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #4 0x00007f8a1df458c3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f8a1deec82b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007f8a1dd25775 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #7 0x00007f8a1cfdb3a9 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5 #8 0x00007f8a1dd269c2 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #9 0x00007f8a1c569609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #10 0x00007f8a1d9b7153 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 4 (Thread 0x7f8a0b4af700 (LWP 3133)): #0 0x00007f8a1bc84732 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #1 0x00007f8a1bc850db in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007f8a1bc852e3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f8a1df458c3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007f8a1deec82b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f8a1dd25775 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007f8a1cfdb3a9 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5 #7 0x00007f8a1dd269c2 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f8a1c569609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #9 0x00007f8a1d9b7153 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 3 (Thread 0x7f8a13a76700 (LWP 3132)): #0 __GI___libc_read (nbytes=16, buf=0x7f8a13a75b60, fd=6) at ../sysdeps/unix/sysv/linux/read.c:26 #1 __GI___libc_read (fd=6, buf=0x7f8a13a75b60, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24 #2 0x00007f8a1bccd89f in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007f8a1bc84cfe in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #4 0x00007f8a1bc85152 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #5 0x00007f8a1bc852e3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #6 0x00007f8a1df458c3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #7 0x00007f8a1deec82b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007f8a1dd25775 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #9 0x00007f8a1e1c7efa in ?? () from /lib/x86_64-linux-gnu/libQt5DBus.so.5 #10 0x00007f8a1dd269c2 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #11 0x00007f8a1c569609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #12 0x00007f8a1d9b7153 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 2 (Thread 0x7f8a18be8700 (LWP 3131)): #0 0x00007f8a1d9aa9bf in __GI___poll (fds=0x7f8a18be7ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007f8a1c526c1a in ?? () from /lib/x86_64-linux-gnu/libxcb.so.1 #2 0x00007f8a1c52887a in xcb_wait_for_event () from /lib/x86_64-linux-gnu/libxcb.so.1 #3 0x00007f8a193f21a8 in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #4 0x00007f8a1dd269c2 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007f8a1c569609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #6 0x00007f8a1d9b7153 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 1 (Thread 0x7f8a19a9c800 (LWP 3130)): [KCrash Handler] #6 0x00007f8a1ce471d2 in QV4::QObjectWrapper::wrap(QV4::ExecutionEngine*, QObject*) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5 #7 0x00007f8a1cef0bf8 in QV4::ExecutionEngine::fromVariant(QVariant const&) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5 #8 0x00007f8a1ce448cd in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5 #9 0x00007f8a1ce45770 in QV4::QQmlContextWrapper::getPropertyAndBase(QV4::QQmlContextWrapper const*, QV4::PropertyKey, QV4::Value const*, bool*, QV4::Value*, QV4::Lookup*) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5 #10 0x00007f8a1ce460b4 in QV4::QQmlContextWrapper::resolveQmlContextPropertyLookupGetter(QV4::Lookup*, QV4::ExecutionEngine*, QV4::Value*) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5 #11 0x00007f8a032e6365 in ?? () #12 0x0000000000000000 in ?? () [Inferior 1 (process 3130) detached] ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: systemsettings 4:5.18.3-0ubuntu1 ProcVersionSignature: Ubuntu 5.4.0-18.22-generic 5.4.24 Uname: Linux 5.4.0-18-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu21 Architecture: amd64 CurrentDesktop: KDE Date: Thu Mar 26 20:24:04 2020 InstallationDate: Installed on 2020-03-26 (0 days ago) InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200326) SourcePackage: systemsettings UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: systemsettings (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1869280 Title: Plasma system settings app crashes when selecting Virtual Desktops menu item To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1869280/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs