11g on Oracle Ent Linux ./runInstaller fails: Error: can't open display:...

Question

X-server stuff is killing me...
As root:
[root@blackbox ~]# xclock
the xclock starts right up.
[root@blackbox ~]# su - oracle
[oracle@blackbox ~]$ /usr/bin/xclock
xclock DOES NOT start. Permissions are fine and command just sits there until Ctl-C to abort.
[oracle@blackbox ~]$ hostname
blackbox
[oracle@blackbox ~]$ echo $DISPLAY
blackbox:0.0
[oracle@blackbox ~]$./runInstaller
...some checks are done and passed
...>>>Could not execute auto check for display colors using command /usr/bin/xdpinfo. Check id the DISPLAY variable is set...
Continue? yes
Can't connect to the X11 window server using blackbox:0.0...
...OUI-10027: To enable clent users to access the X server, ...# xhost +
etc., etc.
I tried all the checks suggested in the message including setting the DISPLAY to:
DISPLAY=192.168.1.110:0.0; export DISPLAY (shell is bash)
I seems that as the oracle user I cannont connect to the Xserver? Not sure how to check other than testing w/ something like xclock.
Any assistance much appreciated.

Answer 1

...ok...I still don't understand what the difference is from before. But, as you suggest...
(btw, the error message ">>> Could not execute auto check..." seems erroneous to me in that I'm running the KDE desktop just fine???)
[root@blackbox ~]#
[oracle@blackbox database]$ echo $SHELL
/bin/bash
[oracle@blackbox database]$
[root@blackbox ~]# DISPLAY=:0.0
[root@blackbox ~]# export DISPLAY
[root@blackbox ~]# echo $DISPLAY
:0.0
[root@blackbox ~]# su - oracle
[oracle@blackbox ~]$ cd /tmp/database/
[oracle@blackbox database]$ ./runInstaller
Starting Oracle Universal Installer...
Checking Temp space: must be greater than 80 MB. Actual 13706 MB Passed
Checking swap space: must be greater than 150 MB. Actual 1791 MB Passed
Checking monitor: must be configured to display at least 256 colors
>>> Could not execute auto check for display colors using command /usr/bin/xdpyinfo. Check if the DISPLAY variable is set. Failed <<<<
Some requirement checks failed. You must fulfill these requirements before
continuing with the installation,at which time they will be rechecked.
Continue? (y/n) [n] y
Rechecking installer requirements....
Preparing to launch Oracle Universal Installer from /tmp/OraInstall2007-10-07_04-14-47PM. Please wait ...[oracle@blackbox database]$ Oracle Universal Installer, Version 11.1.0.6.0 Production
Copyright (C) 1999, 2007, Oracle. All rights reserved.
Can't connect to X11 window server using '192.168.1.110:0.0' as the value of the DISPLAY variable.
192.168.1.110:0.0
192.168.1.110:0.0
OUI-10025:Unable to start an interactive install session because of the following error:Can't connect to X11 window server using '192.168.1.110:0.0' as the value of the DISPLAY variable. The DISPLAY environment variable should be set to <hostname or IP address>:<screen>, where the <screen> is usually '0.0'.
OUI-10026:Depending on the Unix Shell, you can use one of the following commands as examples to set the DISPLAY environment variable:
- For csh: % setenv DISPLAY 192.168.1.128:0.0
- For sh, ksh and bash: $ DISPLAY=192.168.1.128:0.0; export DISPLAY
Use the following command to see what shell is being used:
echo $SHELL
Use the following command to view the current DISPLAY environment variable setting:
echo $DISPLAY
- Make sure that client users are authorized to connect to the X Server.
OUI-10027:To enable client users to access the X Server, open an xterm, dtterm or xconsole as the user that started the session and type the following command:
% xhost +
To test that the DISPLAY environment variable is set correctly, run a X11 based program that comes with the native operating system such as 'xclock':
% <full path to xclock... see below>
If you are not able to run xclock successfully, please refer to your PC-X Server or OS vendor for further assistance.
Typical path for 'xclock': '/usr/X11R6/bin/xclock'
--------------------------------