Solution : https://service.sap.com/sap/support/notes/1170809 (SAP Service marketplace login required)
Key words : 
server supports java swing-based guis, server versions lower, nxserver/nxclient reason, nxserver/nxclient offered, remote desktop tools, experience display problems, run sapinst gui, gui server, remote display, encounter problems
Related Notes : 
       
| 1310037 | SUSE LINUX Enterprise Server 11: Installation notes |