When I defer/suspend a reminder too a later time and turn the computer off and back on again (or reboot the system), the suspended reminder is forgotten.
The old behaviour of remembering suspended reminders, even after a power off/on cycle, is expected.
I can confirm that bug on KDE 4.11 on openSUSE 13.1 with the latest bugfixes applied.
I have updated to 15.12.3 in Fedora 24 and the problem persists!
I put an alert on old for 90 minutes and went to bed about an hour later. About 30 minutes after getting up in the morning, the alert was triggerred—certainly 10-12 hours past the 90 minutes I had indicated.
I deferred a reminder at noon for 5 hours. I suspended the computer for 2 about hours and resumed it around 4. The reminder should have come at 5 o'clock, but didn't. It is now nearly 5:45.
I suspect that the reminder will be 2 hours late.
As I said!
After the last post, I turned off the computer and, now home again, I turned it back on. Guess what!? 19:502 and the reminder was triggerred!
korganizer has amnesia... still!
Please re-assign votes to bug 317656 if you are still interested in seeing this solved.
*** This bug has been marked as a duplicate of bug 317656 ***
Peter, can you still reproduce this? And if so, do you really always get these reminders eventually, or are they sometimes completely lost, as ticket #356429 reports?
I cannot say, at this time. I still use korganizer for reminders on my laptop, but mainly for birthdays reminders and monthly bill payment reminders. I have moved the rest of my reminders to my android phone. I have been trying to watch, but I have not detected anything, but I have not paid accute attention. In the past, the amnesia would occur not just when I turned the computer off, but also when I suspended it. Upon reboot or resume, reminders that should have been triggered during the down time were simply lost. Again, I cannot confirm resolution nor continued issues. I will try to be more attentive, by suspending the computer when I know a reminder is due, to see if it is lost or appears upon resuming, but this could take me quite a long time to report back :-) Then, again, since it took you 5½ years to get back to my bug, I suppose long time is relative.
This ticket reports 2 issues:
1. Lost reminders in Description (and apparently comment 7)
2. Delayed reminders in comments 2 to 4
I would guess that these are 2 independent issues, which should be tracked in different tickets. I believe issue #1 is already tracked properly by ticket #317656. As for #2, if you can reproduce it, I recommend you file a new ticket, referring to a ticket tracking #1 in case there would be a link between these 2 issues.
I recommend that you avoid the term "amnesia" when reporting these issues. "Amnesia" is a medical term, and while amnesia can be temporary, it evokes a permanent loss to me, so using it in a sometimes temporary sense as you seem to do could be misleading.