See Nigel Wade's response below... -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of obed Sent: Tuesday, May 06, 2008 10:35 To: General Red Hat Linux discussion list Subject: Re: Problem with X server How did it work?... what was the problem? On Tue, May 6, 2008 at 12:18 PM, Wiedemann, Shane CIV NAVAIR <shane.wiedemann@xxxxxxxx> wrote: > Success!! You solved my problem! Thank you for taking time to > respond...much appreciated. > Cheers, > Shane Wiedemann > > > -----Original Message----- > From: redhat-list-bounces@xxxxxxxxxx > > [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Nigel Wade > Sent: Tuesday, May 06, 2008 9:09 > To: General Red Hat Linux discussion list > Subject: Re: Problem with X server > > > > Wiedemann, Shane CIV NAVAIR wrote: > > So this problem is most likely user error; none the less... > > I have some software (only one other place has this software) that > to > view video windows that the software tries to pop up, you need > to use > the following command to get it to display: > > "software_name -display hostname", or at least that is what I am told. > > I have inserted my hostname where it says "hostname" and verified > with > > > "uname" that my hostname is correct. I am not connecting to a > remote > machine, am not on a network and am running the software on > a > stand-alone machine. The vendors of the software do connect > remotely, > > > I believe, and they can pop video display windows just fine. > Whenever > > > I run the software, I get a message that says "Unable to connect to > x > server". > > I currently have the DISPLAY variable set to ":0.0" and this seems > to > be fine for opening programs, such as NEdit. Any other setting > (even > "hostname:0.0") and I cannot start programs such as editors > and other > programs that open in a separate window. I get errors > that say "can't > > > open display" and the like. > > > > When I run the software, if I leave out the command "-display > hostname" > > all video rendering is done behind the scenes, i.e., I can't view it. > > > I have tried replacing "hostname" with all of the following: > > hostname:0.0 > > :0.0 > > hostname:0 > > localhost > > localhost:0.0 > > localhost:0 > > > > Any clues? > > I think you probably need to enable your X display to listen on the > network. > > The software you are using is pretty strange. It should not be > necessary to specify the -display option, it should use whatever > DISPLAY is set to. However, given that it does what it does, you are > pretty much at its mercy. > > By default the X display does not listen for network (TCP) > connections, it allows local connections using a UNIX domain socket. > If you have DISPLAY set to :0 clients will connect on the UNIX > socket, but if you specify a hostname (even localhost) then the > connection will be done on a TCP socket. If the X server isn't > listening on a TCP socket then the connection will fail. This is a > quite sensible security precaution (it prevents any non-local clients > connecting to your display, even if you use the xhost + security > disabler) but can cause problems for any software which expects to be able to connect via a TCP socket. > > To enable the TCP socket you need to modify the X server startup. How > you do that depends on what version of RedHat you are using. For RH 4 > it is set in /etc/X11/gdm/gdm.conf. To enable TCP connections you > need to change the line: > DisallowTCP=true > to > DisallowTCP=false > > In KDE desktop you can also set this using the System Settings->Login > Screen dialog (I presume there's something similar for Gnome). In the > Security tab un-check the box marked "Always disallow TCP connections > to X server". > > > -- > Nigel Wade, System Administrator, Space Plasma Physics Group, > University of Leicester, Leicester, LE1 7RH, UK > E-mail : nmw@xxxxxxxxxxxx > Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555 > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > -- obed.org.mx -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
