Recently one of our client using OpenSUSE VM had issues in using VNC viewer for installation of some software and he was facing logout issue when the system was idle. (Although this is good in terms of security but on his request we needed to switch off this feature)

There were several ways but we needed to resolve this quickly so following changes were made.

go to vi /etc/xinetd.d/services

Change the wait parameter from NO to YES

Session out issue resolved!