[tao@dc ~]$ loginctl session-status
3 - tao (1000)
           Since: Sat 2020-12-26 21:45:26 EET; 14h ago
          Leader: 697 (sddm-helper)
            Seat: seat0; vc1
         Display: :0
         Service: sddm; type x11; class user
         Desktop: KDE
           State: active
            Unit: session-3.scope
                  ├─  697 /usr/lib/sddm/sddm-helper --socket /tmp/sddm-auth0ea77c3f-8191-4a9a-94e9-0d74f143e094 --id 1 --start /usr/bin/startplasma-x11 --user tao
                  ├─  715 /usr/bin/kwalletd5 --pam-login 7 3
                  ├─  716 /usr/bin/startplasma-x11
                  ├─  737 /usr/lib/kf5/start_kdeinit
                  ├─  738 kdeinit5: Running...
                  ├─  739 /usr/lib/kf5/klauncher --fd=9
                  ├─  762 /usr/bin/kded5
                  ├─  766 /usr/bin/kwin_x11
                  ├─  788 /usr/bin/ksmserver
                  ├─  797 /usr/lib/polkit-kde-authentication-agent-1
                  ├─  799 /usr/bin/plasmashell
                  ├─  801 /usr/bin/xembedsniproxy
                  ├─  803 /usr/bin/kaccess
                  ├─  835 /usr/bin/gmenudbusmenuproxy
                  ├─  839 /usr/lib/DiscoverNotifier
                  ├─  941 /usr/lib/org_kde_powerdevil
                  ├─ 1203 /usr/lib/qt/libexec/QtWebEngineProcess --type=zygote --no-zygote-sandbox --application-name=plasmashell --webengine-schemes=qrc:sLV --lang=e>
                  ├─ 1204 /usr/lib/qt/libexec/QtWebEngineProcess --type=zygote --application-name=plasmashell --webengine-schemes=qrc:sLV --lang=en-US
                  ├─ 1213 /usr/lib/qt/libexec/QtWebEngineProcess --type=zygote --application-name=plasmashell --webengine-schemes=qrc:sLV --lang=en-US
                  ├─ 1276 python3 -m pixelload.client 32955 --interval=2 --unit-width=60
                  ├─ 1329 /usr/lib/qt/libexec/QtWebEngineProcess --type=utility --enable-features=AllowContentInitiatedDataUrlNavigations,TracingServiceInProcess --di>
                  ├─ 1399 /usr/lib/qt/libexec/QtWebEngineProcess --type=renderer --disable-speech-api --enable-threaded-compositing --enable-features=AllowContentInit>
                  ├─ 1564 file.so [kdeinit5] file local:/run/user/1000/klauncherInhwki.1.slave-socket local:/run/user/1000/kded5DTvYed.1.slave-socket
                  └─36671 /usr/lib/kf5/kio_http_cache_cleaner

Dec 27 12:19:32 dc kwin_x11[766]: qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 57953, resource id: 14797884, major code: 20 (GetProperty), minor co>
Dec 27 12:19:40 dc kwin_x11[766]: file:///usr/share/kwin/aurorae/MenuButton.qml:11: TypeError: Cannot read property 'closeOnDoubleClickOnMenu' of null
Dec 27 12:19:40 dc kwin_x11[766]: file:///usr/share/kwin/aurorae/MenuButton.qml:11: TypeError: Cannot read property 'closeOnDoubleClickOnMenu' of null
Dec 27 12:19:40 dc kwin_x11[766]: file:///usr/share/kwin/aurorae/MenuButton.qml:11: TypeError: Cannot read property 'closeOnDoubleClickOnMenu' of null
Dec 27 12:19:40 dc kwin_x11[766]: file:///usr/share/kwin/aurorae/MenuButton.qml:11: TypeError: Cannot read property 'closeOnDoubleClickOnMenu' of null
Dec 27 12:19:40 dc kwin_x11[766]: file:///usr/share/kwin/aurorae/MenuButton.qml:11: TypeError: Cannot read property 'closeOnDoubleClickOnMenu' of null
Dec 27 12:19:40 dc kwin_x11[766]: file:///usr/share/kwin/aurorae/MenuButton.qml:11: TypeError: Cannot read property 'closeOnDoubleClickOnMenu' of null
Dec 27 12:19:40 dc kwin_x11[766]: file:///usr/share/kwin/aurorae/MenuButton.qml:11: TypeError: Cannot read property 'closeOnDoubleClickOnMenu' of null
Dec 27 12:19:40 dc kwin_x11[766]: QPainter::begin: Paint device returned engine == 0, type: 3
Dec 27 12:19:43 dc plasmashell[799]: QXcbClipboard::setMimeData: Cannot set X11 selection owner