Ok, thanks for the info. Samba, for example, did appear in the old Ubuntu Software Center.... so to understand you the METADATA info hasn't been updated to work with the new Software Center in ubuntu...
So this includes already installed software too.... Ok thanks for helping me to understand... -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-software in Ubuntu. https://bugs.launchpad.net/bugs/1579415 Title: Ubuntu Software Center does not display third party apps or all installed apps Status in gnome-software package in Ubuntu: Opinion Bug description: Description: Ubuntu 16.04 LTS Release: 16.04 gnome-software: Installed: 3.20.1+git20160426.1.a976144-ubuntu-xenial-0ubuntu1 Candidate: 3.20.1+git20160426.1.a976144-ubuntu-xenial-0ubuntu1 Version table: *** 3.20.1+git20160426.1.a976144-ubuntu-xenial-0ubuntu1 500 500 http://gb.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages 100 /var/lib/dpkg/status 3.20.1+git20160420.1.ca63436.ubuntu-xenial-0ubuntu2 500 500 http://gb.archive.ubuntu.com/ubuntu xenial/main amd64 Packages The new Ubuntu Software Center does not display all software. For example no third party repo applications are displayed. Search for example: Ubuntu-restricted-extras - no results muon - no results krita - no results samba - no results These do not show under installed either, though they are installed. However, all are shown in Synaptic Package Manager and MUON Additional: I have installed the old Ubuntu Software Center and can confirm that ALL applications are correctly listed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1579415/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

