Lutris entry missing in Plasma system menu

Hi. I’ve installed Lutris, but its entry is missing in Plasma’s system menu.

Since I’ve installed Lutris I do have a new category ‘Games’ that I did not have before, but it’s empty. And when I search for Lutris using the search option in the menu, it does find it and I can run it without issues. There is a net.lutris.Lutris.desktop file in /usr/share/applications that looks fine to me:

[Desktop Entry]
Name[de]=Lutris
Name[es]=Lutris
Name[hr]=Lutris
Name[nl]=Lutris
Name[ru]=Lutris
Name[zh_CN]=Lutris
Name[pt_BR]=Lutris
Name=Lutris
Comment[de]=Die Bewahrungsplattform für Videospiele
Comment[es]=plataforma de preservación de videojuegos
Comment[hr]=platforma za očuvanje videoigara
Comment[nl]=videogame-bewaarplatform
Comment[zh_CN]=电子游戏保管平台
Comment[pt_BR]=plataforma de preservação de video games
Comment=video game preservation platform
Categories=Game;
Keywords[de]=gaming;spielen;wine;emulator;
Keywords[es]=juego;wine;emulador;
Keywords[hr]=igranje;wine;emulator;
Keywords[nl]=gaming;spellen;wine;emulator;
Keywords[ru]=gaming;wine;emulator;
Keywords[zh_CN]=游戏;wine;模拟器;
Keywords[pt_BR]=gaming;wine;emulação
Keywords=gaming;wine;emulator;
Exec=lutris %U
Icon=lutris
Terminal=false
Type=Application
MimeType=x-scheme-handler/lutris;
X-GNOME-UsesNotifications=true

Any ideas how I can fix this menu entry (without adding a new one of my own)?

Try kbuildsycoca5 in a terminal.

Running kbuildsycoca5 did not change much, if anything. When running the command with the --testmenu option, it confirms there should be something in the Games folder:

$ kbuildsycoca5 --menutest
.
.
Games/  net.lutris.Lutris.desktop
Games/  net.lutris.guild-wars-1.desktop
.
.

After adding an unneeded entry to the Games category using kmenuedit, both Lutris and Guild Wars (added by Lutris) show up in the menu alongside the unneeded entry. Remove the unneeded entry, and Games is empty again. Note kmenuedit does not show the Lutris or Guild Wars entries at all.

Magic happened. No clue what exactly solved the issue, or what the issue really was, but after adding and removing an entry without a command to the Games category, it suddenly started to behave as expected. Both the Lutris and Guild Wars entries now show up in the menu and in kmenuedit.

Sounds like a case of kick-it-hard-enough-and-it-will-work. ¯\_(ツ)_/¯, but I’ll take it…