In this release, Solaris Trusted Extensions on x86 based systems supports only the Xsun X server, not the Xorg X Window server.
Workaround: Install Solaris Trusted Extensions and before rebooting, run the following command:
# /usr/sbin/svccfg -s svc:/application/x11/x11-server \ 'setprop options/server = /usr/openwin/bin/Xsun' |