I remotely log into a CentOS6 machine (using VNC), and then launch Vivado.
Instead of getting the Vivado IDE, an xterm window opens. The following warning is contained in the log:
This is caused by missing font packages related to xterm on the machine (OS related).
When start_gui is called, the X11 xterm is opened and the warning which is not related to Vivado is issued.
In reported cases, closing the opened xterm via Ctrl+C has allowed the Vivado GUI to launch.
Using X11 forwarding/ssh -X does not reproduce the issue.
To install the required fonts, you can use a command similar to the following:
yum install xorg-x11-fonts*
This issue will be resolved in Vivado 2016.2.