Solaris8以降にして初期リリースのバヤイはpatchを当てましょう

ttp://osdir.com/ml/os.solaris.managers.summaries/2002-07/msg00192.html
By default, the X server has a limit of just 128. In order to
increase this limit, you need to run at least Solaris 8 or an
earlier release with the Xserver patch applies that fixes bug:
4185418 the X server should support more connections
Then change the Xservers configuration file and add the "-clients 1024"
option to the X commandline.