Action based on UNKNOWN trigger value

[nmail_uk]

I have an item which every now and again decides to return an UNKNOWN value (in some cases for 10-15 minutes) but an action isn't fired in this case.

How can I be notified when this occurs? When I edit the trigger, I get the option to filter on "trigger value" = PROBLEM or "trigger value" = OK.

What I really want is a "trigger value" <> OK but that's not an option.

[bashman]

It triggers when an *UNKNOWN* value is received:

http://www.zabbix.com/forum/showthread.php?t=15930

[nmail_uk]

Thanks for that but it wasn't my question.

My question was: how can I get a trigger to fire on an UNKNOWN value? It is only firing at the moment when the value is KNOWN and out of my given range.

How can I be notified when an item encounters an UNKNOWN value?

[andrewd]

I have the same issue but haven't been able to find a solution. I made a post here http://www.zabbix.com/forum/showthread.php?t=17458 in which i made a single modification to the action condition which looks like it should work.
However there must be some additional logic to determine how the actions are triggered beyond the trigger value.

I'm not sure what other people do about this because it's quite important to know if triggers can no longer detect if they are true or false.