теперь выглядит вот так :D
https://c.radikal.ru/c03/1909/cc/d4a18d186cc0.png
заработало, переустановил пакет appstream
sudo pacman -S appstream
спасибо двоим сверху, я бы не додумался без вас.
valera_cr
Обалденная ,оказывается, штукенция
Welcome to Discover
An Application Installer for the 22nd Century

Этот попаданец у Вас базу случайно не залочил ?
Попробуйте:
sudo rm /var/lib/pacman/db.lck
И перезапустите.
Или ругается на что. В терминале:
$ plasma-discover

plasma-discover
org.kde.plasma.libdiscover: error loading "fwupd-backend" "Cannot load library /usr/lib/qt/plugins/discover/fwupd-backend.so: (libfwupd.so.2: невозможно открыть разделяемый объектный файл: Нет такого файла или каталога)" QJsonObject({"IID":"org.kde.muon.AbstractResourcesBackendFactory","archreq":0,"className":"FwupdBackendFactory","debug":false,"version":331008})
invalid kns backend! "/usr/share/knsrcfiles/ksysguard.knsrc" because: "Config group not found! Check your KNS3 installation."
adding empty sources model QStandardItemModel(0x5577933afd40)
no packages for "org.kde.okular-md"
no packages for "org.kde.okular-ooo"
no packages for "org.kde.plasma.quicklaunch"
no packages for "org.kde.plasma.weather"
no packages for "org.kde.plasma.systemmonitor.memory"
no packages for "org.libreoffice.kde"
no packages for "org.kde.killbots"
no packages for "org.kde.desktopcontainment"
no packages for "org.kde.plasma.networkmanagement"
no packages for "org.kde.plasma.systemloadviewer"
no packages for "org.kde.plasma.webbrowser"
no packages for "org.kde.plasma.clipboard"
no packages for "org.kde.okular-tiff"
no packages for "org.kde.plasma.pager"
no packages for "org.kde.okular-plucker"
no packages for "org.kde.plasmoidviewer"
no packages for "org.kde.plasma.showActivityManager"
no packages for "org.kde.plasma.notes"
no packages for "org.kde.okular-dvi"
no packages for "org.kde.plasma.worldmap"
no packages for "org.kde.okular-comicbook"
no packages for "org.kde.plasma.trash"
no packages for "org.kde.plasma.comic"
no packages for "org.kde.plasma.windowlist"
no packages for "org.kde.plasma.battery"
no packages for "org.kde.hunyango"
no packages for "org.kde.haenau"
no packages for "org.kde.okular-poppler"
no packages for "org.kde.plasma.lock_logout"
no packages for "org.kde.plasma.keyboardindicator"
no packages for "org.kde.paneltoolbox"
no packages for "org.kde.plasma.printmanager"
no packages for "org.kde.okular-xps"
no packages for "org.kde.plasma.grouping"
no packages for "org.kde.plasma.analogclock"
no packages for "org.kde.plasma.folder"
no packages for "org.kde.color"
no packages for "org.kde.kbackup.desktop"
no packages for "org.kde.image"
no packages for "org.kde.plasma.worldclock"
no packages for "org.kde.okular-epub"
no packages for "org.kde.okular-fax"
no packages for "org.kde.plasma.bluetooth"
no packages for "org.kde.plasma.systemmonitor.diskusage"
no packages for "org.kde.plasma.showdesktop"
no packages for "org.kde.okular-mobipocket"
no packages for "org.kde.plasma.diskquota"
no packages for "org.kde.plasma.themeexplorer"
no packages for "org.kde.plasma.systemtray"
no packages for "org.kde.plasma.calendar"
no packages for "org.kde.plasma.lookandfeelexplorer"
no packages for "org.gnome.cantarell"
no packages for "org.kde.kdialog"
no packages for "org.kde.plasma.systemmonitor.diskactivity"
no packages for "org.freedesktop.appstream.cli"
no packages for "org.kde.breezedark.desktop"
no packages for "org.kde.plasma.userswitcher"
no packages for "org.kde.plasma.systemmonitor.net"
no packages for "org.kde.plasma.desktop.emptyPanel"
no packages for "org.kde.desktoptoolbox"
no packages for "org.kde.okular-kimgio"
no packages for "org.kde.plasma.fuzzyclock"
no packages for "org.kde.plasma.kicker"
no packages for "org.kde.plasma_applet_dict"
no packages for "org.kde.plasma.activitypager"
no packages for "org.kde.kio_audiocd"
no packages for "org.kde.plasma.colorpicker"
no packages for "org.kde.plasma.cuttlefish"
no packages for "org.kde.plasmashell"
no packages for "org.kde.plasma.fifteenpuzzle"
no packages for "org.kde.plasma.timer"
no packages for "org.kde.kmouth"
no packages for "org.kde.kscreen"
no packages for "org.kde.milou"
no packages for "org.kde.plasma.mediacontroller"
no packages for "org.kde.plasma.konsoleprofiles"
no packages for "org.kde.discover.packagekit"
no packages for "org.kde.breeze.desktop"
no packages for "org.kde.plasma.quickshare"
no packages for "org.kde.plasma.mediaframe"
no packages for "org.kde.plasma.systemmonitor.cpu"
no packages for "org.kde.plasma.katesessions"
no packages for "org.kde.plasma.activitybar"
no packages for "org.kde.potd"
no packages for "org.kde.slideshow"
no packages for "org.kde.plasma.icontasks"
no packages for "org.kde.okular-fb"
no packages for "org.kde.kinfocenter"
no packages for "org.kde.plasma.taskmanager"
no packages for "owncloud_kaccounts_ui"
no packages for "org.kde.okular-chm"
no packages for "org.kde.plasma.digitalclock"
no packages for "org.kde.plasma.desktop.appmenubar"
no packages for "org.kde.okular-txt"
no packages for "org.kde.plasma.volume"
no packages for "org.kde.plasma.desktop.defaultPanel"
no packages for "org.kde.plasma.kickerdash"
no packages for "org.kde.plasma.calculator"
no packages for "org.kde.plasma.appmenu"
no packages for "org.kde.discover.flatpak"
no packages for "org.kde.plasmoidviewershell"
no packages for "org.kde.plasma.notifications"
no packages for "org.kde.plasma.devicenotifier"
no packages for "org.kde.okular-spectre"
no packages for "org.kde.plasma.binaryclock"
no packages for "org.kde.kpat"
no packages for "org.kde.plasma.desktop"
no packages for "org.kde.plasma.kimpanel"
no packages for "org.kde.okular-djvu"
no packages for "org.kde.plasma.kickoff"
no packages for "org.kde.plasma.vault"
no packages for "org.kde.discovernotifier"
no packages for "org.kde.plasma.minimizeall"
empty appstream db
org.kde.plasma.libdiscover: error loading "flatpak-backend" "Cannot load library /usr/lib/qt/plugins/discover/flatpak-backend.so: (libflatpak.so.0: невозможно открыть разделяемый объектный файл: Нет такого файла или каталога)" QJsonObject({"IID":"org.kde.muon.AbstractResourcesBackendFactory","archreq":0,"className":"FlatpakBackendFactory","debug":false,"version":331008})
no packages for "org.kde.okular-md"
no packages for "org.kde.okular-ooo"
no packages for "org.kde.plasma.quicklaunch"
no packages for "org.kde.plasma.weather"
no packages for "org.kde.plasma.systemmonitor.memory"
no packages for "org.libreoffice.kde"
no packages for "org.kde.killbots"
no packages for "org.kde.desktopcontainment"
no packages for "org.kde.plasma.networkmanagement"
no packages for "org.kde.plasma.systemloadviewer"
no packages for "org.kde.plasma.webbrowser"
no packages for "org.kde.plasma.clipboard"
no packages for "org.kde.okular-tiff"
no packages for "org.kde.plasma.pager"
no packages for "org.kde.okular-plucker"
no packages for "org.kde.plasmoidviewer"
no packages for "org.kde.plasma.showActivityManager"
no packages for "org.kde.plasma.notes"
no packages for "org.kde.okular-dvi"
no packages for "org.kde.plasma.worldmap"
no packages for "org.kde.okular-comicbook"
no packages for "org.kde.plasma.trash"
no packages for "org.kde.plasma.comic"
no packages for "org.kde.plasma.windowlist"
no packages for "org.kde.plasma.battery"
no packages for "org.kde.hunyango"
no packages for "org.kde.haenau"
no packages for "org.kde.okular-poppler"
no packages for "org.kde.plasma.lock_logout"
no packages for "org.kde.plasma.keyboardindicator"
no packages for "org.kde.paneltoolbox"
no packages for "org.kde.plasma.printmanager"
no packages for "org.kde.okular-xps"
no packages for "org.kde.plasma.grouping"
no packages for "org.kde.plasma.analogclock"
no packages for "org.kde.plasma.folder"
no packages for "org.kde.color"
no packages for "org.kde.kbackup.desktop"
no packages for "org.kde.image"
no packages for "org.kde.plasma.worldclock"
no packages for "org.kde.okular-epub"
no packages for "org.kde.okular-fax"
no packages for "org.kde.plasma.bluetooth"
no packages for "org.kde.plasma.systemmonitor.diskusage"
no packages for "org.kde.plasma.showdesktop"
no packages for "org.kde.okular-mobipocket"
no packages for "org.kde.plasma.diskquota"
no packages for "org.kde.plasma.themeexplorer"
no packages for "org.kde.plasma.systemtray"
no packages for "org.kde.plasma.calendar"
no packages for "org.kde.plasma.lookandfeelexplorer"
no packages for "org.gnome.cantarell"
no packages for "org.kde.kdialog"
no packages for "org.kde.plasma.systemmonitor.diskactivity"
no packages for "org.freedesktop.appstream.cli"
no packages for "org.kde.breezedark.desktop"
no packages for "org.kde.plasma.userswitcher"
no packages for "org.kde.plasma.systemmonitor.net"
no packages for "org.kde.plasma.desktop.emptyPanel"
no packages for "org.kde.desktoptoolbox"
no packages for "org.kde.okular-kimgio"
no packages for "org.kde.plasma.fuzzyclock"
no packages for "org.kde.plasma.kicker"
no packages for "org.kde.plasma_applet_dict"
no packages for "org.kde.plasma.activitypager"
no packages for "org.kde.kio_audiocd"
no packages for "org.kde.plasma.colorpicker"
no packages for "org.kde.plasma.cuttlefish"
no packages for "org.kde.plasmashell"
no packages for "org.kde.plasma.fifteenpuzzle"
no packages for "org.kde.plasma.timer"
no packages for "org.kde.kmouth"
no packages for "org.kde.kscreen"
no packages for "org.kde.milou"
no packages for "org.kde.plasma.mediacontroller"
no packages for "org.kde.plasma.konsoleprofiles"
no packages for "org.kde.discover.packagekit"
no packages for "org.kde.breeze.desktop"
no packages for "org.kde.plasma.quickshare"
no packages for "org.kde.plasma.mediaframe"
no packages for "org.kde.plasma.systemmonitor.cpu"
no packages for "org.kde.plasma.katesessions"
no packages for "org.kde.plasma.activitybar"
no packages for "org.kde.potd"
no packages for "org.kde.slideshow"
no packages for "org.kde.plasma.icontasks"
no packages for "org.kde.okular-fb"
no packages for "org.kde.kinfocenter"
no packages for "org.kde.plasma.taskmanager"
no packages for "owncloud_kaccounts_ui"
no packages for "org.kde.okular-chm"
no packages for "org.kde.plasma.digitalclock"
no packages for "org.kde.plasma.desktop.appmenubar"
no packages for "org.kde.okular-txt"
no packages for "org.kde.plasma.volume"
no packages for "org.kde.plasma.desktop.defaultPanel"
no packages for "org.kde.plasma.kickerdash"
no packages for "org.kde.plasma.calculator"
no packages for "org.kde.plasma.appmenu"
no packages for "org.kde.discover.flatpak"
no packages for "org.kde.plasmoidviewershell"
no packages for "org.kde.plasma.notifications"
no packages for "org.kde.plasma.devicenotifier"
no packages for "org.kde.okular-spectre"
no packages for "org.kde.plasma.binaryclock"
no packages for "org.kde.kpat"
no packages for "org.kde.plasma.desktop"
no packages for "org.kde.plasma.kimpanel"
no packages for "org.kde.okular-djvu"
no packages for "org.kde.plasma.kickoff"
no packages for "org.kde.plasma.vault"
no packages for "org.kde.discovernotifier"
no packages for "org.kde.plasma.minimizeall"
empty appstream db
took really long to fetch PackageKitBackend(0x55779309cc90)
discover в kde не показывает не установленные приложения, а показывает только установленные приложения, но показывает все расширения к плазме установленные и не установленные, это нормально что не показывает неустановленные приложения? пакет packagekit-qt5 установлен, попробовал переустановить не помогло, еще не нашел настройки самого приложения, и поиск не находит программы, так и должно быть?
https://b.radikal.ru/b22/1909/b1/aac63d8ae84c.png
https://a.radikal.ru/a12/1909/91/367f066c9246.png
https://b.radikal.ru/b10/1909/4c/cc19614d41bb.png