Problem with X server
truc nguyen
nguyentruc_us at yahoo.com
Tue May 6 18:43:49 UTC 2008
Hi
Why do you use a military account for this list?
--- "Wiedemann, Shane CIV NAVAIR"
<shane.wiedemann at navy.mil> wrote:
> See Nigel Wade's response below...
>
> -----Original Message-----
> From: redhat-list-bounces at redhat.com
> [mailto:redhat-list-bounces at redhat.com] 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 at navy.mil> wrote:
> > Success!! You solved my problem! Thank you for
> taking time to
> > respond...much appreciated.
> > Cheers,
> > Shane Wiedemann
> >
> >
> > -----Original Message-----
> > From: redhat-list-bounces at redhat.com
> >
> > [mailto:redhat-list-bounces at redhat.com] 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 at ion.le.ac.uk
> > Phone : +44 (0)116 2523548, Fax : +44 (0)116
> 2523555
> >
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