[Bug 315732] [NEW] lighting doesn't play well with events in remote calendars from other clients

[Jason W]

Public bug reported:

Binary package hint: lightning-extension

I recently switched from Windows to Linux for my desktop operating
system.  On Windows I was using Sunbird with a davical back-end.  I
installed the Lightning plug-in in Thunderbird on my new Linux system
and tried to connect to the davical.  Immediately it displayed 60+
alerts (playing an alarm for each), and when I tried to do dismiss all
it said that the data had changed on the server, to which I said submit
anyway.  After this point, when starting Thunderbird the alarm window
pops up (empty) and the notification sound always plays 33 times.
Nothing shows up in the error console.  I'm running a remote calendar
under davical 0.9.6.1 on Debian (Linux 2.6.24-etchnhalf.1-686).  I'm
using the latest Thunderbird and Lightning packages on Ubuntu 8.10
(Linux 2.6.27-9-generic).  This problem didn't occur when I was running
Sunbird on Windows.

It would appear that Lightning (and Sunbird) don't play well with
calendar data created by other calendar software.  I messed around with
it a bit, in one case exporting the data to an ICS file, then importing
it again (which involved waiting through endless beeps) into a separate
CalDAV user space, only to find the problem persisted.  I even tried
wiping out the davical database and doing an import ... still the same
behavior.

I was able to resolve the issue by exporting everything from the CalDAV
server to an ICS file, importing it into a local Lightning calendar,
acknowledging all of the alerts, exporting it again to another ICS file,
deleting everything from the CalDAV server and importing the second ICS
file.

This has also been reported to Mozilla in bug report 472961.

TO REPRODUCE

1. Set up a davical server and set up a user to host a calendar.
2. Configure the calendar in Lightning
3. Import ics data from (attached)
4. Attempt to dismiss alerts.
5. Quit thunderbird
6. Start thunderbird again.

WHAT HAPPENS

On step 3 a number of alerts will pop for past events which should already be acknowledged.
On step 6 the alarm window will pop up and there should be multiple beeps.  The alarm window should be empty.


WHAT I'D EXPECT

Import without beeping repeatedly, then not pop an empty alarm window
every time Thunderbird is opened.


I'm running a remote calendar under davical 0.9.6.1 on Debian (Linux 2.6.24-etchnhalf.1-686).  I'm using the latest Thunderbird (2.0.0.19+nobinonly-0ubuntu0.8.10.1) and Lightning (lightning-extension/0.8+nobinonly-0ubuntu1) packages on Ubuntu 8.10 (Linux 2.6.27-9-generic).

** Affects: lightning-sunbird (Ubuntu)
     Importance: Undecided
         Status: New

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lighting doesn't play well with events in remote calendars from other clients
https://bugs.launchpad.net/bugs/315732
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