[jdl]

Could not find if someone had mentioned that before, but I observe EVENT alarms all the times the copter is set to Automatic Land Mode via FMS or enters this mode as a post-action when RTB sequence is running and Home Position is reached (Revolution board, M8N GPS, AuxMag on I2C). Event system is heavily overloaded and lot of data is skipped (OSD and GCS). No impact on the landing process itself. Other autonomous modes work without such EVENT alarms. What is the explanation? Can this be avoided by proper settings?

[TheOtherCliff]

What events are they?  Are there different kinds or all the same kind?

Maybe you could set up a scope to display them and post a screen capture and description?

[jdl]

I think I may need some help for properly setting the scope. Found an example .opl file with such EVENT alarms, it is attached. Set a scope for SystemStats.EventSystemWarningID and on the third occurence of EVENT alarm it displayed 0x35ED3046. As I said, a lot of telemetry data is simply not transferred to GCS and OSD in such situation, that's why this EventSystemWarningID is not present in the log for the first two occurences. No sure if this info is useful. I definitely need some more guidance...

date, Time, Sec since start, Connected, Data changed, .Alarm.EventSystem, .EventSystemWarningID
2016-10-17, 11:04:54.375, 37.589, 1, 0, OK,   0
2016-10-17, 11:04:54.375, 37.589, 1, 0, OK,   0
2016-10-17, 11:04:54.418, 37.632, 1, 1, Warning,   0
2016-10-17, 11:04:54.418, 37.632, 1, 0, Warning,   0
2016-10-17, 11:04:54.460, 37.674, 1, 0, Warning,   0
2016-10-17, 11:04:54.504, 37.718, 1, 1, Warning, 904736838
2016-10-17, 11:04:54.504, 37.718, 1, 0, Warning, 904736838
2016-10-17, 11:04:54.508, 37.722, 1, 0, Warning, 904736838
2016-10-17, 11:04:54.509, 37.723, 1, 0, Warning, 904736838
2016-10-17, 11:04:54.515, 37.729, 1, 0, Warning, 904736838
2016-10-17, 11:04:54.519, 37.733, 1, 0, Warning, 904736838
2016-10-17, 11:04:54.519, 37.733, 1, 0, Warning, 904736838
2016-10-17, 11:04:54.589, 37.803, 1, 0, Warning, 904736838
2016-10-17, 11:04:54.604, 37.818, 1, 0, Warning, 904736838
2016-10-17, 11:04:54.605, 37.819, 1, 0, Warning, 904736838
2016-10-17, 11:04:54.608, 37.822, 1, 0, Warning, 904736838
2016-10-17, 11:04:54.610, 37.824, 1, 0, Warning, 904736838
2016-10-17, 11:04:54.610, 37.824, 1, 0, Warning, 904736838
2016-10-17, 11:04:54.658, 37.872, 1, 0, Warning, 904736838
2016-10-17, 11:04:54.658, 37.872, 1, 0, Warning, 904736838
2016-10-17, 11:04:54.687, 37.901, 1, 0, Warning, 904736838
2016-10-17, 11:04:54.708, 37.922, 1, 1, OK, 904736838
2016-10-17, 11:04:54.733, 37.947, 1, 1, OK, 904736838
2016-10-17, 11:04:54.734, 37.948, 1, 0, OK, 904736838
2016-10-17, 11:04:54.734, 37.948, 1, 0, OK, 904736838
2016-10-17, 11:04:54.739, 37.953, 1, 0, OK, 904736838
2016-10-17, 11:04:54.744, 37.958, 1, 0, OK, 904736838

[TheOtherCliff]

Thanks.
Development guys have been notified.