sudo apt install tracker helped and now the icon is no longer greyed out. I checked the bug you linked and I definitely think that search in new Ubuntu Session needs to be improved, Unity dash searched for all my files easily and they were always very quickly accessible, KDE does the same with Baloo indexing, everything is easily found in KDE menu search. That is the feature I miss the most from Unity on this new Gnome based session, that and minimize on click option for dock.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1702878 Title: Cant add folders to Search in Gnome Control Center Status in gnome-control-center package in Ubuntu: Confirmed Bug description: When I go to Gnome Control Center-Search the bottom right gear is greyed out and I cant add any folders to Search. lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu Artful Aardvark (development branch) Release: 17.10 Codename: artful apt-cache policy gnome-control-center gnome-control-center: Installed: 1:3.24.2-0ubuntu4 Candidate: 1:3.24.2-0ubuntu4 Version table: *** 1:3.24.2-0ubuntu4 500 500 http://archive.ubuntu.com/ubuntu artful/main amd64 Packages 100 /var/lib/dpkg/status ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-control-center 1:3.24.2-0ubuntu4 ProcVersionSignature: Ubuntu 4.10.0-26.30-generic 4.10.17 Uname: Linux 4.10.0-26-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.5-0ubuntu5 Architecture: amd64 CurrentDesktop: GNOME Date: Fri Jul 7 12:36:34 2017 InstallationDate: Installed on 2017-06-17 (19 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170616) SourcePackage: gnome-control-center UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1702878/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp