I wa wondering - when the system is not used at all - or almost not used - e.g. no network traffic - the CPU Utilization is way higher then when in use.
Check: http://stargate.solsys.org/mod.php?mod=systat&op=list&host=2
The Overview … On the bottom - the CPU % Utilization - and the network Usage ?
Perhaps your screensaver is using a lot of resources… ![]()
Are you sure there’s no traffic passing through the router on other interfaces? The CPU usage shouldn’t go up when idle.
What version of ROS are you using?