As I cannot reproduce the problem I can only guess - most likely are
there several zeitgeist-daemon or zeitgeist-fts running which are
locking the database.
Can you check the following:
ps -ef | grep zeitgeist
copy the output and then kill all the processes. See whether it works -
if it does the
This is a zeitgeist issue which is trying to access a locked database.
Logging out Unity and logging in usually fixes this issue.
Can you reproduce this issue though in anyway?
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Is there a way to unlock the zeitgeist database without logging out and
in (I won't do that for the next days, maybe weeks, I guess)? I can only
guess whether the issue persists accross reboot, maybe it reappears
systematically very soon right after logging in.
After reading your reply I feel