The search app, displays all the expected results, but when I put in a saved search in dashboard, nothing is displayed. The default panels display data, but even a simple search such as host=(star).(star) displays nothing in the dashboard.
Here is one search I made (took it from the default search to see if anything would work.)
error OR failed OR severe OR ( sourcetype=access_* ( 404 OR 500 OR 503 ) ) - called test dashboard
and the search for search network offline network ports is: host="logger.office.sample.com" port off-line
IT Dashboard test dashboard Discover Offline ports all
No search that is put in a panel shows any data (in the chart), but it can display the results if its in data table format.
I believe the answer to your question can be found at this link.
http://splunk-base.splunk.com/answers/26626/chart-not-plotting-in-dashboard
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all
well host=. wont actually work (unless you have ips for hosts). Try host=* - however i dont think this is your issue... you can try pasting your xml here and we can try troubleshooting that. Otherwise i dont think we have enough info to be able to tell what's wrong..