By default (fresh install on debian), the syslogd is creating event for
but on the event list, the message is :
An event with no matching configuration was received from interface XX
the events/Syslogd.events.xml is using configuration for uei.opennms.org/syslogd/<facility>/Info instead.
Renaming the uei "Info" to "Informational" in events/Syslogd.events.xml solved the issue.
I think there is a mismatch between the syslogd output and the event definition.