1004IPMIDRVSystemThe IPMI device driver attempted to communicate with the IPMI BMC device during normal operation. However the communication failed due to a timeout. You can increase the timeouts associated with the IPMI device driver.
If you are getting this error on DELL hardware but aren't observing any problems in regards to functionality or stability, then this warning message can be ignored.
Some users have reported no adverse effects from this event, others have reported serious stability problems correlated to this event.
Upgrading firmware/bios/drivers may eliminate this message as well.