Kde 6 black screen upon start

Help
1

When I sign in from SDDM and the startup logo goes away, I’m left with a black screen with windows on it, so KWin seems fine. When I move my cursor down to the task bar, it pops up, then reloads KDE Desktop. It’s fine until I move my cursor off the task bar, then it crashes.

i do get a crash log

Application: Crash Handler (drkonqi), signal: Segmentation fault

[KCrash Handler]
#4  0x00007f3c816c2424 in pthread_mutex_lock () at /lib64/libc.so.6
#5  0x00007f3c8459261a in wl_display_flush () at /usr/lib64/qt6/plugins/platforms/../../../libwayland-client.so.0
#6  0x00007f3c2753855c in ??? () at /usr/lib64/libvulkan_radeon.so
#7  0x00007f3c27538ee0 in ??? () at /usr/lib64/libvulkan_radeon.so
#8  0x00007f3c82b410be in ??? () at /usr/lib64/libQt6Gui.so.6
#9  0x00007f3c82b53773 in ??? () at /usr/lib64/libQt6Gui.so.6
#10 0x00007f3c82b537ec in ??? () at /usr/lib64/libQt6Gui.so.6
#11 0x00007f3c82b538bd in ??? () at /usr/lib64/libQt6Gui.so.6
#12 0x00007f3c7ce04bb8 in ??? () at /usr/lib64/libQt6Quick.so.6
#13 0x00007f3c7ce37f91 in ??? () at /usr/lib64/libQt6Quick.so.6
#14 0x00007f3c7ce2a6c7 in ??? () at /usr/lib64/libQt6Quick.so.6
#15 0x00007f3c7ce2a8f2 in ??? () at /usr/lib64/libQt6Quick.so.6
#16 0x00007f3c81df51aa in ??? () at /usr/lib64/libQt6Core.so.6
#17 0x00007f3c816bf1d1 in ??? () at /lib64/libc.so.6
#18 0x00007f3c8172da8c in ??? () at /lib64/libc.so.6

Thread 15 (Thread 0x7f3c4a0006c0 (LWP 7991) "drkonq:traceq0"):
#1  0x00007f3c816be382 in pthread_cond_wait () at /lib64/libc.so.6
#2  0x00007f3c6028234d in ??? () at /usr/lib64/libgallium-24.2.1.so
#3  0x00007f3c60261ceb in ??? () at /usr/lib64/libgallium-24.2.1.so
#4  0x00007f3c6028227b in ??? () at /usr/lib64/libgallium-24.2.1.so
#5  0x00007f3c816bf1d1 in ??? () at /lib64/libc.so.6
#6  0x00007f3c8172da8c in ??? () at /lib64/libc.so.6

Thread 14 (Thread 0x7f3c4aa006c0 (LWP 7990) "drkonq:traceq0"):
#1  0x00007f3c816be382 in pthread_cond_wait () at /lib64/libc.so.6
#2  0x00007f3c6028234d in ??? () at /usr/lib64/libgallium-24.2.1.so
#3  0x00007f3c60261ceb in ??? () at /usr/lib64/libgallium-24.2.1.so
#4  0x00007f3c6028227b in ??? () at /usr/lib64/libgallium-24.2.1.so
#5  0x00007f3c816bf1d1 in ??? () at /lib64/libc.so.6
#6  0x00007f3c8172da8c in ??? () at /lib64/libc.so.6

Thread 13 (Thread 0x7f3c4b4006c0 (LWP 7986) "drkonq:sh_opt0"):
#1  0x00007f3c816be382 in pthread_cond_wait () at /lib64/libc.so.6
#2  0x00007f3c6028234d in ??? () at /usr/lib64/libgallium-24.2.1.so
#3  0x00007f3c60261ceb in ??? () at /usr/lib64/libgallium-24.2.1.so
#4  0x00007f3c6028227b in ??? () at /usr/lib64/libgallium-24.2.1.so
#5  0x00007f3c816bf1d1 in ??? () at /lib64/libc.so.6
#6  0x00007f3c8172da8c in ??? () at /lib64/libc.so.6

Thread 12 (Thread 0x7f3c4be006c0 (LWP 7985) "drkonqi:sh0"):
#1  0x00007f3c816be382 in pthread_cond_wait () at /lib64/libc.so.6
#2  0x00007f3c6028234d in ??? () at /usr/lib64/libgallium-24.2.1.so
#3  0x00007f3c60261ceb in ??? () at /usr/lib64/libgallium-24.2.1.so
#4  0x00007f3c6028227b in ??? () at /usr/lib64/libgallium-24.2.1.so
#5  0x00007f3c816bf1d1 in ??? () at /lib64/libc.so.6
#6  0x00007f3c8172da8c in ??? () at /lib64/libc.so.6

Thread 11 (Thread 0x7f3c552006c0 (LWP 7984) "drkonqi:cs0"):
#1  0x00007f3c816be382 in pthread_cond_wait () at /lib64/libc.so.6
#2  0x00007f3c6028234d in ??? () at /usr/lib64/libgallium-24.2.1.so
#3  0x00007f3c60261ceb in ??? () at /usr/lib64/libgallium-24.2.1.so
#4  0x00007f3c6028227b in ??? () at /usr/lib64/libgallium-24.2.1.so
#5  0x00007f3c816bf1d1 in ??? () at /lib64/libc.so.6
#6  0x00007f3c8172da8c in ??? () at /lib64/libc.so.6

Thread 10 (Thread 0x7f3c6e0006c0 (LWP 7829) "QQmlThread"):
#1  0x00007f3c81498a37 in ??? () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f3c81499130 in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f3c81cc1650 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt6Core.so.6
#4  0x00007f3c81f1c97a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt6Core.so.6
#5  0x00007f3c81e55d20 in QThread::exec() () at /usr/lib64/libQt6Core.so.6
#6  0x00007f3c81df51aa in ??? () at /usr/lib64/libQt6Core.so.6
#7  0x00007f3c816bf1d1 in ??? () at /lib64/libc.so.6
#8  0x00007f3c8172da8c in ??? () at /lib64/libc.so.6

Thread 9 (Thread 0x7f3c6d6006c0 (LWP 22194) "Thread (pooled)"):
#1  0x00007f3c816be6ca in pthread_cond_timedwait () at /lib64/libc.so.6
#2  0x00007f3c81dd5221 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib64/libQt6Core.so.6
#3  0x00007f3c81dfe2ae in ??? () at /usr/lib64/libQt6Core.so.6
#4  0x00007f3c81df51aa in ??? () at /usr/lib64/libQt6Core.so.6
#5  0x00007f3c816bf1d1 in ??? () at /lib64/libc.so.6
#6  0x00007f3c8172da8c in ??? () at /lib64/libc.so.6

Thread 8 (Thread 0x7f3c6ea006c0 (LWP 22192) "Thread (pooled)"):
#1  0x00007f3c816be6ca in pthread_cond_timedwait () at /lib64/libc.so.6
#2  0x00007f3c81dd5221 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib64/libQt6Core.so.6
#3  0x00007f3c81dfe2ae in ??? () at /usr/lib64/libQt6Core.so.6
#4  0x00007f3c81df51aa in ??? () at /usr/lib64/libQt6Core.so.6
#5  0x00007f3c816bf1d1 in ??? () at /lib64/libc.so.6
#6  0x00007f3c8172da8c in ??? () at /lib64/libc.so.6

Thread 7 (Thread 0x7f3c6f4006c0 (LWP 22185) "gdbus"):
#1  0x00007f3c81498a37 in ??? () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f3c8149940f in g_main_loop_run () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f3c7e506aba in ??? () at /usr/lib64/libgio-2.0.so.0
#4  0x00007f3c814c7381 in ??? () at /usr/lib64/libglib-2.0.so.0
#5  0x00007f3c816bf1d1 in ??? () at /lib64/libc.so.6
#6  0x00007f3c8172da8c in ??? () at /lib64/libc.so.6

Thread 6 (Thread 0x7f3c6fe006c0 (LWP 22184) "gmain"):
#1  0x00007f3c81498a37 in ??? () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f3c81499130 in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f3c81499181 in ??? () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f3c814c7381 in ??? () at /usr/lib64/libglib-2.0.so.0
#5  0x00007f3c816bf1d1 in ??? () at /lib64/libc.so.6
#6  0x00007f3c8172da8c in ??? () at /lib64/libc.so.6

Thread 5 (Thread 0x7f3c74a006c0 (LWP 22183) "pool-spawner"):
#1  0x00007f3c814f6634 in g_cond_wait () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f3c8146136b in ??? () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f3c814c7a42 in ??? () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f3c814c7381 in ??? () at /usr/lib64/libglib-2.0.so.0
#5  0x00007f3c816bf1d1 in ??? () at /lib64/libc.so.6
#6  0x00007f3c8172da8c in ??? () at /lib64/libc.so.6

Thread 4 (Thread 0x7f3c754006c0 (LWP 22182) "QNetworkAccessM"):
#1  0x00007f3c81498a37 in ??? () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f3c81499130 in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f3c81cc1650 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt6Core.so.6
#4  0x00007f3c81f1c97a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt6Core.so.6
#5  0x00007f3c81e55d20 in QThread::exec() () at /usr/lib64/libQt6Core.so.6
#6  0x00007f3c81df51aa in ??? () at /usr/lib64/libQt6Core.so.6
#7  0x00007f3c816bf1d1 in ??? () at /lib64/libc.so.6
#8  0x00007f3c8172da8c in ??? () at /lib64/libc.so.6

Thread 3 (Thread 0x7f3c768006c0 (LWP 22141) "WaylandEventThr"):
#1  0x00007f3c816be382 in pthread_cond_wait () at /lib64/libc.so.6
#2  0x00007f3c81dd529b in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib64/libQt6Core.so.6
#3  0x00007f3c7dfb62d7 in ??? () at /usr/lib64/qt6/plugins/platforms/../../../libQt6WaylandClient.so.6
#4  0x00007f3c81df51aa in ??? () at /usr/lib64/libQt6Core.so.6
#5  0x00007f3c816bf1d1 in ??? () at /lib64/libc.so.6
#6  0x00007f3c8172da8c in ??? () at /lib64/libc.so.6

Thread 2 (Thread 0x7f3c7de006c0 (LWP 22072) "QDBusConnection"):
#1  0x00007f3c81498a37 in ??? () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f3c81499130 in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f3c81cc1671 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt6Core.so.6
#4  0x00007f3c81f1c97a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt6Core.so.6
#5  0x00007f3c81e55d20 in QThread::exec() () at /usr/lib64/libQt6Core.so.6
#6  0x00007f3c825d664e in ??? () at /usr/lib64/libQt6DBus.so.6
#7  0x00007f3c81df51aa in ??? () at /usr/lib64/libQt6Core.so.6
#8  0x00007f3c816bf1d1 in ??? () at /lib64/libc.so.6
#9  0x00007f3c8172da8c in ??? () at /lib64/libc.so.6

Thread 1 (Thread 0x7f3c7e3dedc0 (LWP 22003) "drkonqi"):
#1  0x00007f3c816be382 in pthread_cond_wait () at /lib64/libc.so.6
#2  0x00007f3c81dd529b in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib64/libQt6Core.so.6
#3  0x00007f3c7ce2939d in ??? () at /usr/lib64/libQt6Quick.so.6
#4  0x00007f3c81ef2044 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () at /usr/lib64/libQt6Core.so.6
#5  0x00007f3c83316079 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt6Widgets.so.6
#6  0x00007f3c81ef22d8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt6Core.so.6
#7  0x00007f3c827c66ff in QWindowPrivate::destroy() () at /usr/lib64/libQt6Gui.so.6
#8  0x00007f3c827c996d in QWindow::event(QEvent*) () at /usr/lib64/libQt6Gui.so.6
#9  0x00007f3c83316089 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt6Widgets.so.6
#10 0x00007f3c81ef22d8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt6Core.so.6
#11 0x00007f3c8276f5ed in QGuiApplicationPrivate::processCloseEvent(QWindowSystemInterfacePrivate::CloseEvent*) () at /usr/lib64/libQt6Gui.so.6
#12 0x00007f3c827cc24b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt6Gui.so.6
#13 0x00007f3c82b84ef4 in ??? () at /usr/lib64/libQt6Gui.so.6
#14 0x00007f3c81495802 in ??? () at /usr/lib64/libglib-2.0.so.0
#15 0x00007f3c81498ad7 in ??? () at /usr/lib64/libglib-2.0.so.0
#16 0x00007f3c81499130 in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#17 0x00007f3c81cc1650 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt6Core.so.6
#18 0x00007f3c81f1c97a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt6Core.so.6
#19 0x00007f3c81f1cb37 in QCoreApplication::exec() () at /usr/lib64/libQt6Core.so.6
#20 0x000056061e05cc56 in ??? ()
#21 0x00007f3c816592e0 in ??? () at /lib64/libc.so.6
#22 0x00007f3c81659399 in __libc_start_main () at /lib64/libc.so.6
#23 0x000056061e05db55 in ??? ()
[Inferior 1 (process 22003) detached]

System info

OS:: Gentoo/Linux x86_64
Kernel: 6.10.6-gentoo-custom-superficial
DE: Plasma 6.1.4
GPU Driver: amdgpu
2

What is your qt6 version ?

Could you install the debug symbols for qtquick.

4

i think i might have found the problem seems its not using qt6 even though its installed

qmake -v
QMake version 3.1
Using Qt version 5.15.14 in /usr/lib64

qtchooser -list-versions
5
default
qt5-x86_64-pc-linux-gnu
qt5

qtchooser -print-env
QT_SELECT="default"
QTTOOLDIR="/usr/lib64/qt5/bin"
QTLIBDIR="/usr/lib64"

Here is the reported installed version below:

[I] kde-plasma/plasma-desktop
Installed versions:  6.1.4(6)^t(09:02:00 07/09/24)(handbook screencast sdl semantic-desktop -debug -ibus -scim -test -webengine)

Here is qtbase reported installed version im recompiling now

[I] dev-qt/qtbase
Installed versions:  6.7.2-r4(6/6.7.2)^t(03:44:32 28/08/24)(X concurrent cups dbus gtk gui icu libinput libproxy network nls opengl sql sqlite ssl udev vulkan wayland widgets xml zstd -accessibility -brotli -eglfs -evdev -gles2-only -gssapi -journald -mysql -oci8 -odbc -postgres -renderdoc -sctp -syslog -test -tslib)

I have the debug symbols installed ill have to see if the crash window pops up most of the time it does not

5

Update couldn’t get it working uninstalled kde and removed

~/.kde, ~/.config/kde*, and ~/.local/share/config/
/etc/xdg/, /usr/share/config/, and /usr/share/kde/

then reinstalled kde and kwin this solved the issue

so clearly something was seriously wrong with my configs