A Q on high CPU time..

Tue Mar 21 08:32:07 UTC 2017

Why is xorg process taking near 100% cpu time on a Ubuntu whenever there a mouse movement/keyboard activity at the console?
We don't see this problem with a remote session (such as rsh).
The problem is seen on 
Linux NC1500 4.8.0-36-lowlatency #36~16.04.1-Ubuntu SMP PREEMPT

Rgds,Kiran
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