Qsys doesn't open

Had the same issue on a 64 bits Linux installation, there were no logs, but I managed to launch Qsys from the commandline with:

/quartus/sopc_builder/bin/qsys-edit

and the following error came up:

2014.04.18.13:59:44 Info: Doing: qsys-edit

Exception in thread "main" java.lang.UnsatisfiedLinkError: /opt/Altera/13.1/quartus/linux/jre/lib/i386/xawt/libmawt.so: libXtst.so.6: cannot open shared object file: No such file or directory

at java.lang.ClassLoader$NativeLibrary.load(Native Method)

at java.lang.ClassLoader.loadLibrary0(Unknown Source)

...

Problem is Quartus is on a 64 bits Linux while Java here is looking for a 32 bits (i386) version of a library, solution is to install it with:

sudo apt-get install libxtst6:i386

Solution came from http://stackoverflow.com/questions/17355863/cant-find-install-libxtst-so-6