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I recently started using a Nextcloud instance for my calendar events. I am able to sync events so they show up in the GNOME Calendar app, but there are many duplicates. Is there some place where events are cached locally where I can examine them or clean them up?

The events display properly in the Nextcloud Calendar app -- I don't see any duplicates. I only see the duplicates in GNOME Calendar.

I looked in locations mentioned in In what file does gnome-calendar store calendar events? but I didn't see any actual calendar event data, just references to the calendar webdav URIs.

I tried deleting and re-adding my Nextcloud account in the "Online Accounts" settings dialog. I tried disabling and re-enabling Calendar synchronization for my Nextcloud account.

I'm using:

  • Ubuntu 20.04 LTS
  • Nextcloud 19.0.3 (latest stable)
  • GNOME Calendar 3.36.2
Adam Monsen
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2 Answers2

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Looks like they are in SQLite3 databases under ~/.cache/evolution/calendar/. I was able to trash that directory and it automatically re-sync'd. Yay!

The duplicates still exist; this separate issue might be with the Nextcloud database. I downloaded the ics file for the calendar from Nextcloud and I do see what appear to be duplicates in there.

Adam Monsen
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  • I was having trouble with a related issue (recurring events that kept appearing after they were edited to add an end date) and found that I had to kill the calendar first. I did `pkill -f calendar` to stop the calendar and then `rm -rf ~/{.local/share,.cache}/evolution/calendar/` to get any mystery caches cleared. – Amanda Mar 23 '22 at 00:56
  • Yeah, a better method to kill the calendar is shown in @francois-corthay's answer – Jonas Berlin Aug 09 '22 at 09:32
  • Good to know. If that one gets upvoted past this one I'll mark it as the accepted answer. – Adam Monsen Aug 11 '22 at 23:59
  • Hrm. Now I can't get any combination of this and the other answer to get my ubuntu 22.04 LTS desktop GNOME calendar syncing with Nextcloud calendar again. Anyone else have more luck? I also asked here: https://help.nextcloud.com/t/how-to-delete-and-re-sync-gnome-calendar-tasks-contacts/153617 – Adam Monsen Jan 13 '23 at 18:28
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Quit all evolution items (see ps ax | grep evolution):

evolution --force-shutdown

and clear cache:

evolution --force-shutdown

Restarting evolution will show how the appointments are loaded back into the calendar.

Francois Corthay
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  • This first, then the answer by @adam-monsen did the trick! – Jonas Berlin Aug 09 '22 at 09:31
  • @francois-corthay are those two code sections in your answer supposed to be different? I think some other command is necessary to clear the cache. I'm also curious if this works on Ubuntu 22.04 or if some other solution is necessary. – Adam Monsen Jan 13 '23 at 18:31