remote CLion use on another monitor.

Environment:

1. using recent version (2017.2.1) of CLion.

2. Remote PC OS: Ubuntu 14.04 LTS

3. Host PC OS: Ubuntu 14.04 LTS

4. PC: Macbook Pro

I'm using CLion with remote X window. I'm connecting to the host PC and running CLion and then CLion shows up to my remote client PC. When I use MacBook Pro without any external monitor, it works fine. But when I have one more external monitor (1920x1080p), CLion startup is really slow and stops at some point. The ssh terminal is also not responding after my key input.

In the ps command result, I can see the additional following processes. 

~/clion-2017.2.1/bin/fsnotifier64

~/clion-2017.2.1/jre64/bin java -Xbootclasspath/a:~/clion-2017.2.1/lib/boot.jar -classpath ~/clion-2017.2.1/lib/bootstrap.jar:~

The following picture is when the CLion program stopped.