Application: kinfocenter (5.17.4)

Qt Version: 5.14.0
Frameworks Version: 5.65.0
Operating System: Linux 5.4.6-2-MANJARO x86_64
Distribution: Manjaro Linux

-- Information about the crash:
Hi, few days ago I switched to the latest version of Manjaro XFCE Edition, then tried the KDE Edition, but it didn't show desktop wallpaper and the application menu didn't work, so I returned to the XFCE Edition. Then I tried to install KDE manually: following this guide from the official wiki of Manjaro, it all worked good, except the fact that I still can't see the desktop wallpaper (but the icons are there, because I could open the browser clicking in the position i remembered it was in), the application menu doesn't work (I can't type in the search bar, but in Krunner i can) and the widget menu doesn't show the widgets. I tried "systemctl reboot" and i could see the wallpaper and the programs for a brief moment, then all black again. Also, when something like a pop-up shows up or a video starts playing, the screen goes all black for a second.
Also I tried to install kio-gdrive for Dolphin file manager, but I could not add any account because the "Add account" button wouldn't work. I tried entering KDE System Settings, I can't enter any of its menu and when I close it, it keeps crashing.

The only app I've tried which works fine so far is KDE Connect.

P.S: sorry for my bad English.

The crash can be reproduced every time.

-- Backtrace:
Application: Info Center (kinfocenter), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb1e50ad080 (LWP 1951))]

Thread 9 (Thread 0x7fb1d0f98700 (LWP 1959)):
#0  0x00007fb1e8309c45 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fb1d2e18d0c in  () at /usr/lib/dri/i965_dri.so
#2  0x00007fb1d2e18908 in  () at /usr/lib/dri/i965_dri.so
#3  0x00007fb1e83034cf in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fb1e98d12d3 in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7fb1d1799700 (LWP 1958)):
#0  0x00007fb1e8309c45 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fb1d2e18d0c in  () at /usr/lib/dri/i965_dri.so
#2  0x00007fb1d2e18908 in  () at /usr/lib/dri/i965_dri.so
#3  0x00007fb1e83034cf in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fb1e98d12d3 in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fb1d1f9a700 (LWP 1957)):
#0  0x00007fb1e8309c45 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fb1d2e18d0c in  () at /usr/lib/dri/i965_dri.so
#2  0x00007fb1d2e18908 in  () at /usr/lib/dri/i965_dri.so
#3  0x00007fb1e83034cf in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fb1e98d12d3 in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7fb1d279b700 (LWP 1956)):
#0  0x00007fb1e8309c45 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fb1d2e18d0c in  () at /usr/lib/dri/i965_dri.so
#2  0x00007fb1d2e18908 in  () at /usr/lib/dri/i965_dri.so
#3  0x00007fb1e83034cf in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fb1e98d12d3 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fb1e132f700 (LWP 1955)):
#0  0x00007fb1e98c69ef in poll () at /usr/lib/libc.so.6
#1  0x00007fb1e796a120 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fb1e796a1f1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fb1e9e7fcdc in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fb1e9e2639c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fb1e9c4be62 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fb1e8c60b28 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007fb1e9c4cfd6 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fb1e83034cf in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fb1e98d12d3 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fb1e1bc1700 (LWP 1954)):
#0  0x00007fb1e98c69ef in poll () at /usr/lib/libc.so.6
#1  0x00007fb1e796a120 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fb1e796b0c3 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#3  0x00007fb1e305cbc8 in  () at /usr/lib/libgio-2.0.so.0
#4  0x00007fb1e7946bb1 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007fb1e83034cf in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fb1e98d12d3 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fb1e23c2700 (LWP 1953)):
#0  0x00007fb1e98c69ef in poll () at /usr/lib/libc.so.6
#1  0x00007fb1e796a120 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fb1e796a1f1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fb1e796a242 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fb1e7946bb1 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007fb1e83034cf in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fb1e98d12d3 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fb1e42c0700 (LWP 1952)):
#0  0x00007fb1e98c69ef in poll () at /usr/lib/libc.so.6
#1  0x00007fb1e852d630 in  () at /usr/lib/libxcb.so.1
#2  0x00007fb1e852f2db in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007fb1e4c7aa01 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007fb1e9c4cfd6 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007fb1e83034cf in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fb1e98d12d3 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fb1e50ad080 (LWP 1951)):
[KCrash Handler]
#5  0x00007fb1e03c3090 in  () at /usr/lib/libKF5Solid.so.5
#6  0x00007fb1e03b8766 in  () at /usr/lib/libKF5Solid.so.5
#7  0x00007fb1e03b88d9 in  () at /usr/lib/libKF5Solid.so.5
#8  0x00007fb1e03b9f2f in  () at /usr/lib/libKF5Solid.so.5
#9  0x00007fb1e03bbc29 in  () at /usr/lib/libKF5Solid.so.5
#10 0x00007fb1e9c523c3 in QThreadStorageData::finish(void**) () at /usr/lib/libQt5Core.so.5
#11 0x00007fb1e9e29c8a in QCoreApplicationPrivate::cleanupThreadData() () at /usr/lib/libQt5Core.so.5
#12 0x00007fb1ea1e1179 in QGuiApplicationPrivate::~QGuiApplicationPrivate() () at /usr/lib/libQt5Gui.so.5
#13 0x00007fb1ea8bcd8a in QApplicationPrivate::~QApplicationPrivate() () at /usr/lib/libQt5Widgets.so.5
#14 0x00007fb1e9e5b522 in QObject::~QObject() () at /usr/lib/libQt5Core.so.5
#15 0x00007fb1e9e29a10 in QCoreApplication::~QCoreApplication() () at /usr/lib/libQt5Core.so.5
#16 0x00007fb1ea8beeb5 in QApplication::~QApplication() () at /usr/lib/libQt5Widgets.so.5
#17 0x0000564b13594078 in  ()
#18 0x00007fb1e97f9153 in __libc_start_main () at /usr/lib/libc.so.6
#19 0x0000564b135940ce in _start ()
[Inferior 1 (process 1951) detached]

Possible duplicates by query: bug 415960, bug 415956, bug 415930, bug 415618, bug 415532.

Reported using DrKonqi