Bug#766426: Dolphin search displays "Invalid protocol" error.
For the benefit of those, like me, who encounter this problem with a recent
install, note that the solution has changed since the transition in Testing to
KDE Frameworks 5: don't install baloo4, it won't work with current dolphin.
Instead, install baloo-kf5.
Maintainers, please consider making plasma-desktop (or some package you think
is more appropriate - perhaps dolphin) at least recommend baloo-kf5. From what
I can tell, right now, nothing even suggests baloo-kf5, and it's rather opaque
to an ordinary user that this package might be necessary for some standard
functionality.
Peace,
Brendon
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