To run more than one frame buffer, you need to modify your /etc/dt/config/Xservers file. Identify the device name for the frame buffers you are using. To do this:
Become superuser and open the /etc/dt/config/Xservers file.
# cd /etc/dt/config # vi Xservers
Modify the file by adding the device locations for the applicable frame buffers being used.
The following example shows the Xservers configuration file modified for one Creator (ffb0) card and two Expert3D cards (ifb0 and ifb1):
:0 Local local_uid@console root /usr/openwin/bin/Xsun :0 -dev /dev/fbs/ffb0 -dev /dev/fbs/ifb1 -dev /dev/fbs/ifb0 -nobanner