Today we bumped KDE SC 4.11 beta 1 (4.10.80) in the gentoo kde overlay. The semantic-desktop use flag is dropped in >=kde-base/4.10.80, as you may already noticed or read in dilfridges blog post. So if your hardware is not powerful enough or you just don’t want to use the feature you can easily disable it at runtime.
1. Go to the “System Settings” and search for “Desktop Search”
2. Uncheck at least the file and email indexer. You can also disable the “Nepomuk Semantic Desktop”.
If you want to disable Akonadi you can check out this blog post.