Arch Linux

YuvarajVelmurugan

Member

Registered: 2020-11-23

Posts: 15

[Solved] Plasma Discover Not Showing Installed Apps

I have installed arch linux for the first time and installed plasma desktop environment. I am able to successfully login to the machine.

But when i open the plasma discover program it is not showing any applications under installed menu. It is displaying "still looking" for a long time and nothing happens. Also unable to search any application from plasma discover. When i ran "plasma-discover" from the terminal below information is been shown:

Cyclic dependency detected between "file:///usr/lib/qt/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml" and "file:///usr/lib/qt/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml"
QObject::startTimer: Timers cannot have negative intervals
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:153:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:83:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/OverlayDrawer.qml:291:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:153:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:83:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9: QML RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop detected for property "maximumWidth"
file:///usr/lib/qt/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9: QML RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop detected for property "maximumWidth"
file:///usr/lib/qt/qml/org/kde/kirigami.2/private/RefreshableScrollView.qml:137:13: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:153:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:108:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:83:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:102:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:108:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:102:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:108:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:102:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
invalid kns backend! "/usr/share/knsrcfiles/servicemenu.knsrc" because: "Config group not found! Check your KNS3 installation."
invalid kns backend! "/usr/share/knsrcfiles/ksysguard.knsrc" because: "Config group not found! Check your KNS3 installation."
org.kde.plasma.libdiscover: error loading "fwupd-backend" "Cannot load library /usr/lib/qt/plugins/discover/fwupd-backend.so: (libfwupd.so.2: cannot open shared object file: No such file or directory)" QJsonObject({"IID":"org.kde.muon.AbstractResourcesBackendFactory","archreq":0,"className":"FwupdBackendFactory","debug":false,"version":331520})
org.kde.plasma.libdiscover: error loading "flatpak-backend" "Cannot load library /usr/lib/qt/plugins/discover/flatpak-backend.so: (libflatpak.so.0: cannot open shared object file: No such file or directory)" QJsonObject({"IID":"org.kde.muon.AbstractResourcesBackendFactory","archreq":0,"className":"FlatpakBackendFactory","debug":false,"version":331520})
adding empty sources model QStandardItemModel(0x55c773d19f50)
file:///usr/lib/qt/qml/org/kde/kirigami.2/private/PrivateActionToolButton.qml:77:5: QML Binding: Binding loop detected for property "value"
file:///usr/lib/qt/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9: QML RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop detected for property "maximumWidth"
took really long to fetch KNSBackend(0x55c77338b870, name = "/usr/share/knsrcfiles/kwineffect.knsrc")
took really long to fetch KNSBackend(0x55c773cc4a40, name = "/usr/share/knsrcfiles/kwinscripts.knsrc")
took really long to fetch KNSBackend(0x55c773cc35d0, name = "/usr/share/knsrcfiles/ksplash.knsrc")
took really long to fetch KNSBackend(0x55c773cc5920, name = "/usr/share/knsrcfiles/wallpaperplugin.knsrc")
took really long to fetch KNSBackend(0x55c773ccff60, name = "/usr/share/knsrcfiles/kfontinst.knsrc")
took really long to fetch KNSBackend(0x55c773cd54d0, name = "/usr/share/knsrcfiles/wallpaper.knsrc")
took really long to fetch KNSBackend(0x55c773ce35d0, name = "/usr/share/knsrcfiles/comic.knsrc")
took really long to fetch KNSBackend(0x55c773ce45c0, name = "/usr/share/knsrcfiles/kwinswitcher.knsrc")
took really long to fetch KNSBackend(0x55c773cd7650, name = "/usr/share/knsrcfiles/icons.knsrc")
took really long to fetch KNSBackend(0x55c773ce6fd0, name = "/usr/share/knsrcfiles/plasmoids.knsrc")
took really long to fetch KNSBackend(0x55c773ce65e0, name = "/usr/share/knsrcfiles/gtk_themes.knsrc")
took really long to fetch KNSBackend(0x55c773ce9ae0, name = "/usr/share/knsrcfiles/aurorae.knsrc")
took really long to fetch KNSBackend(0x55c773cf0360, name = "/usr/share/knsrcfiles/systemmonitor-faces.knsrc")
took really long to fetch KNSBackend(0x55c773cf3d80, name = "/usr/share/knsrcfiles/window-decorations.knsrc")
took really long to fetch KNSBackend(0x55c773cefe70, name = "/usr/share/knsrcfiles/plasma-themes.knsrc")
took really long to fetch KNSBackend(0x55c773ce8280, name = "/usr/share/knsrcfiles/xcursor.knsrc")
took really long to fetch KNSBackend(0x55c773cff020, name = "/usr/share/knsrcfiles/sddmtheme.knsrc")
took really long to fetch KNSBackend(0x55c773d01f40, name = "/usr/share/knsrcfiles/lookandfeel.knsrc")
took really long to fetch KNSBackend(0x55c773cf0ca0, name = "/usr/share/knsrcfiles/discover_ktexteditor_codesnippets_core.knsrc")
took really long to fetch KNSBackend(0x55c773d0d990, name = "/usr/share/knsrcfiles/systemmonitor-presets.knsrc")
took really long to fetch KNSBackend(0x55c773d05780, name = "/usr/share/knsrcfiles/konsole.knsrc")
took really long to fetch KNSBackend(0x55c773d08d10, name = "/usr/share/knsrcfiles/colorschemes.knsrc")

From terminal i switched to root user and then ran "plasma-discover" command and got below error:

qt.qpa.xcb: could not connect to display 
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: wayland-org.kde.kwin.qpa, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl, xcb.

Aborted (core dumped)

Last edited by YuvarajVelmurugan (2020-11-23 14:20:53)

---

Thanks,
Yuvaraj Velmurugan

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,361

Re: [Solved] Plasma Discover Not Showing Installed Apps

Welcome to the boards, please wrap outputs in

[code] code here[/code]

tags

Did you install the optional dependencies? Most importantly packagekit-qt5 for repo package integration?

General words of advice, the GUI package managers have relatively loose integration not as complete descriptions and often don't show certain information, it's fine to use them for searching and installing and the like, general updates should probably rather be done with pacman from the cli.

Also don't get into the habit of randomly trying to sledgehammer issues as root. There's no need nor reason to even attempt to run discover as root.

YuvarajVelmurugan

Member

Registered: 2020-11-23

Posts: 15

Re: [Solved] Plasma Discover Not Showing Installed Apps

Yes. I installed packagekit-qt5 from terminal using pacman. But still issue remains.

---

Thanks,
Yuvaraj Velmurugan

Zod

Member

From: Hoosiertucky

Registered: 2019-03-10

Posts: 636

Re: [Solved] Plasma Discover Not Showing Installed Apps

Try opening a terminal, using pacman, reinstall archlinux-appstream-data and reboot.

Remember, when it asks you if you want to re-install, choose yes.

YuvarajVelmurugan

Member

Registered: 2020-11-23

Posts: 15

Re: [Solved] Plasma Discover Not Showing Installed Apps

It worked. Issue is resolved.

---

Thanks,
Yuvaraj Velmurugan