Hey jfk,
First, thank you for your answer,
Concerning the part of the codec used, we use only HAP and some HAP alpha files, so i guess the problem don't come from this part, right ?
Concerning the VNC part you right, i will try to delete it and use the vnc embeded but why that's work well on my producer backup wich have also tightvnc.
For the watchdog log, i see nothing inside ( on the producer side ), do i need to look inside the display side log ?
Do you think is possible to have something wrong in my encoding show which can create a conflict on some computer ? like play severals aux timelines in same times, severals trigger, etc....