couldn't find per display information

[Ionut Grigorescu_2]

Hello,

maybe is not the right place for a linux question, but I received here answers also for Solaris:-)
I have a linux (Fedora core 1, XFREE86 ver. 4.0 )box on which I want to export the display from an HPUX11.00 server. On the UX machine I give the right command
setenv DISPLAY :0.0
and I can see with echo $DISPLAY that the new value is right. On the linux box I give
xhost + to enable the remote access end echo $DISPLAY on the linux box returns
:0.0
..but whatever X application I start on the UX server it returns "couldn't find per display information".
Where should I dig further?
N.B. - the linux box is actualy a dual boot machine, the second OS is Window$2000 and I can start from Window$ using ReflectionX an XDMCP session to the UX server without problems...

thank you all,
ionut

[Hoefnix]

You should enter the xhost + command on the linux box.
Then connect to the HP-UX system and type:
export DISPLAY=1.1.1.1:0.0

Then start for exmpl xclock and it should run on your Linux system.
Regards,

Peter

[Ionut Grigorescu_2]

Peter, thank you for the answer but if you had readen carefuly my post you had seeen that I have already performed those steps, I use setenv DISPLAY instead of export DISPLAY because for the user I use on the UX box is defined the C-shell - I did it so 1000 times before with RedHat 7.3 and after I have installed - recently - Fedora it doesn't work more - maybe is that a issue of Gnome (before I had KDE)? I have disabled the Firewall on the Linux box, too (it was activated during the installation).

[Martin Johnson]

Verify that you still have the X libraries installed on your Linux machine and that the libraries are still in the PATH.

HTH
Marty

[Hoefnix]

Sorry I could not help, I missed the xhost + on the linux box in your post.

Regards, Peter

[John Dvorchak]

The "couldn't find per display information" error comes from the HPUX box not being able to find a running X-server on the DISPLAY:0 that you are exporting. Be sure that you have an X-server running on the Linux box and it is display :0.0 not :1.0 etc.

[Ionut Grigorescu_2]

Hi,

xhost shows me access control disabled, clients can connect from any host,
from the Unix server I can ping the linux box, but trying to start a xterm failes with the same damn message :-( /usr/X11R6/bin is in the path, the X server is running and displaying on :0.0, I don't have any other idea ...
What is worse, I have the IP 10.1.40.77, from another linux box (with RedHat7.3 ) with IP 10.1.40.89 I can start an X application on the Unix server ..

[Elmar P. Kolkman]

On the linux box, you can check if the X-server is listening for X-calls on the IP layer. I've seen Xwindows configurations that only listened to unix-domain sockets, meaning the only accept local calls. You can do this by looking at the netstat -a output (should be listening on port 6100 I think) or set the DISPLAY var on linux with the same content you use on the HP-UX box and then run a X command there.

[Ionut Grigorescu_2]

Elmar,

once more for your 10 points: how can I make x11 to listen on a tcp port - cause you're right - it's not. I have try on the linux box to
export DISPLAY=:0.0
after that xhost without arguments or xhost + fail with:
"xhost: unable to open display=:0.0"

[Elmar P. Kolkman · Accepted solution]

Check how your Xwindows is started. For instance, if it is started with '-nolisten tcp' that would result in your problem.
You might look into your manual page on X(1) or use this link: http://www.xfree.org/current/Xserver.1.html

Good luck, Elmar

[Ionut Grigorescu_2]

Hi Elmar,

you know, working on 2 forums has some advantages, isn't it ? ;-)
so the solution: check the variable DisallowTCP in /etc/X11/gdm/gdm.conf, it should be "false", otherwise the gdm deamon starts X with -nolisten tcp option.