Originally Posted by kforbus
Maybe you could try:
# su - oracle
$ export DISPLAY=127.0.0.1:0.0
$ xhost +
I know you said you tried it as root, but I'm not sure if you've tried it as your oracle user. Hopefully that will make a difference for you.
I tried but dose not work
[root@localhost ~]# xclock
[root@localhost ~]# su - oracle
[oracle@localhost ~]$ export DISPLAY=127.0.0.1:0.0
[oracle@localhost ~]$ xhost +
xhost: unable to open display "127.0.0.1:0.0"