Please provide omnicheck -patches from the Linux client. I've seen this behavior with a very early version of the Java GUI. I usually work with the Windows GUI, even with a UNIX CS. But you might need it for Linux EADR. Are there any error messages you can share with us after the following is displayed when you invoke xomni especially when you do a context switch to Device and Media.
"Java GUI has been started, please wait a moment ..."
The Java version looks fine. You can try to setup a Java GUI on a Windows client to see if the uiproxy provides valid information.
Please also provide...
--- Please assign a KUDO to this post, if you find it useful.
ProcName Status [PID] ===============================
rds : Active 
crs : Active 
mmd : Active 
kms : Active 
uiproxy : Active 
Sending of traps disabled. ===============================
Status: All Data Protector relevant processes/services up and running.
[root@server1 ~]# /opt/omni/java/server/bin/uiproxyd -version /opt/omni/java/server/bin/uiproxyd: error while loading shared libraries: libmsg.so: cannot open shared object file: No such file or directory