Please disregard my previous posting, you don't need the while loop, since it's already in the scheduler (around lines 2160 under /*---- send interrupt events ----*/). 

But now I remember the rationale behind it. The loop over the rb[i] is because in MEG I have n calibration threads, each one running on a separate CPU core. So the receive_trigger_event() routine has to collect events from all the 
threads, each of them having one ring buffer. In the process of implementing EQ_USER, I changed this somehow, and apparently broke the code by making the while() loop looping forever if the event rate is over 100 Hz.

So for the moment please remove the while loop completely, and I will worry later of putting it back correctly when MEG will start again next year.

/Stefan