Reminder keeps coming up after dismissing

[jethrogb]

I often have this problem where after I dismiss a reminder it comes back (in a seemingly endless loop).

My software:

Linux EWS Provider 3.8.0 Lightning 4.7.4 Thunderbird 45.4.0

Please let me know what additional information I can provide.

[tyldum]

Is it recurring tasks? If so, try turning off reminders for past events under global calendar settings.

[jethrogb]

Do you mean Preferences > Calendar > Reminders > When a Reminder is Due: > Show missed reminders? I have turned that off now, I'll see if it makes a difference.

[tyldum]

Yup. Was on a non-English tbird at the time, so hard to describe. Glad you found it.

[t2d]

Thank you for explaining the work-around. The constant reminders made my Thunderbird unusable. But in general, I want to see missed reminders. Is there a solution to only this plugin?

[vicmunoz]

I'm affected too. Workaround worked fine for me. Thanks My config: Linux EWS Provider 3.9.0 Lightning 4.7.4 Thunderbird 45.7.0

[retorquere]

@jethrogb I can't find that preference but in about:config I changed calendar.alarms.showmissed to false assuming it does the same.

[FelixBuehler]

@jethrogb Couldn't find the setting either, so thanks for the hint.

[navid-zamani]

There’s a much worse problem here:

If you accept those missed alarms, instead of just plain closing the window with (x), you recurring events get reset!

How to reproduce:

1. Install and run a radicale or similar CalDAV server. (E.g. on your PC.)
2. Install aCalendar or a similar app on Android. Use DAVx⁵ to connect to the CalDAV server.
3. Connect Thunderbird/Lightning to the same CalDAV server.
4. Create a recurring event (e.g. every Saturday for the whole day) with a reminder (e.g. 3 hours in advance, or even multiple reminders) on your phone.
5. Sync your phone to CalDAV (e.g. in DAVx⁵), then sync to Thunderbird/Lightning. Close Thunderbird(!).
6. Now wait until one event is passed and accept the reminder on your phone.
7. Sync your phone again.
8. After a while, edit one past occurrence of the event, and say you only want to edit that one, and not any future ones or all of them. Move it to another (earlier?) day. (E.g. to Friday.)
9. Sync your phone again.
10. Reopen Thunderbird/Lightning.
11. Get an alarm for that old occurrence because it was saved with the original reminder.
12. Accept the reminder, so TB doesn’t show it anymore.

Expected result: Aside from ignoring the missed alarm, the moved older event should stay moved.

Actual result: The edited older event is either moved back(!) or another (duplicate) event is created where it used(!) to be.

After long non-usage of TB, I clicked to accept all past alarms, and in one big swoop my entire calendar of the past months was in chaos! Which is baaad, because I use it as a journal, to see what was done and when. (That’s why my workaround, and generally a good idea, was to turn the radicale file storage (which I chose for that reason) into a git repository, and use kdeconnect’s command function, to get a button on my phone that lets me commit changes to git. Which I do twice a day. That way I can always go back. A la timeline.)