On Tue, May 6, 2008 at 12:18 PM, Wiedemann, Shane CIV NAVAIR
<shane.wiedemann@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@redhat.com
>
> [mailto:redhat-list-bounces@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@ion.le.ac.uk
> Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555
>
> --
> redhat-list mailing list
> unsubscribe mailto:redhat-list-request@redhat.com?subject=unsubscribe
> https://www.redhat.com/mailman/listinfo/redhat-list
>
> --
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05-06-2008, 06:11 PM
"Wiedemann, Shane CIV NAVAIR"
Problem with X server
See Nigel Wade's response below...
-----Original Message-----
From: redhat-list-bounces@redhat.com
[mailto:redhat-list-bounces@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@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@redhat.com
>
> [mailto:redhat-list-bounces@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@ion.le.ac.uk
> Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555
>
> --
> redhat-list mailing list
> unsubscribe mailto:redhat-list-request@redhat.com?subject=unsubscribe
> https://www.redhat.com/mailman/listinfo/redhat-list
>
> --
> redhat-list mailing list
> unsubscribe mailto:redhat-list-request@redhat.com?subject=unsubscribe
> https://www.redhat.com/mailman/listinfo/redhat-list
>
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> See Nigel Wade's response below...
>
> -----Original Message-----
> From: redhat-list-bounces@redhat.com
> [mailto:redhat-list-bounces@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@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@redhat.com
> >
> > [mailto:redhat-list-bounces@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@ion.le.ac.uk
> > Phone : +44 (0)116 2523548, Fax : +44 (0)116
> 2523555
> >
> > --
> > redhat-list mailing list
> > unsubscribe
>
mailto:redhat-list-request@redhat.com?subject=unsubscribe
> >
> https://www.redhat.com/mailman/listinfo/redhat-list
> >
> > --
> > redhat-list mailing list
> > unsubscribe
>
mailto:redhat-list-request@redhat.com?subject=unsubscribe
> >
> https://www.redhat.com/mailman/listinfo/redhat-list
> >
>
>
>
> --
>
> obed.org.mx
>
> --
> redhat-list mailing list
> unsubscribe
>
mailto:redhat-list-request@redhat.com?subject=unsubscribe
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Problem with X server
