Following messages still can be seen in the IPMI event logs:
18 02/08/2012 03:01:18 OEM Physical Security (Chassis Intrusion) General Chassis Intrusion - Asserted
17 02/08/2012 03:01:06 OEM Physical Security (Chassis Intrusion) General Chassis Intrusion - Deasserted
We told customers to update IPMI firmware from 2.05 to 2.07 firmware, but this did not solve the problem.
Chassis intrusion have to be reset in ipmi web interface of ipmiview. When chassis intrusion is triggered, then a reset button will appear in ipmi web interface of ipmiview. You can do this on the sensor page, but it could be that you have to scroll down to see it. This message will repeat until the reset is pressed. This is to prevent that a unauthorized person who opened the chassis can reset the warning themselves.