X apps don't launch from Xterm

This is a stable install that has been running, er, with great
stability, for well over a year; it was brought up to date with etch
no problemo earlier in the year. A recent routine 'apt-get update',
'apt-get upgrade' has left me with some new, and rather disagreeable,
behaviour.

This box boots to a command prompt, and then after logging in as a
regular user I launch X with a simple 'startx.' This gets me Gnome. If
I then start an xterm and attempt to launch an X app, such as gqview,
or evince, from the command prompt in that xterm, no app launches;
this is what I get:

--snip--

wingnut@trollboy:~$ gqview
(gqview:26337): Gtk-WARNING **: cannot open display:

wingnut@trollboy:~$ evince
(evince:28047): Gtk-WARNING **: cannot open display:

wingnut@trollboy:~$ echo $DISPLAY
0:0.

--snip--

As you can see, the display id is available in the environment.

Also, setting 'xhost +' in a .xinitrc file does not affect this behaviour.

Has some X policy been put into place? Where to reverse it?


Best,

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On Wed, Jun 25, 2008 at 02:05:45PM -0400, Eric d'Alibut wrote:
> This is a stable install that has been running, er, with great
> stability, for well over a year; it was brought up to date with etch
> no problemo earlier in the year. A recent routine 'apt-get update',
> 'apt-get upgrade' has left me with some new, and rather disagreeable,
> behaviour.
>
> This box boots to a command prompt, and then after logging in as a
> regular user I launch X with a simple 'startx.' This gets me Gnome. If
> I then start an xterm and attempt to launch an X app, such as gqview,
> or evince, from the command prompt in that xterm, no app launches;
> this is what I get:
>
> --snip--
>
> wingnut@trollboy:~$ gqview
> (gqview:26337): Gtk-WARNING **: cannot open display:
>
> wingnut@trollboy:~$ evince
> (evince:28047): Gtk-WARNING **: cannot open display:
>
> wingnut@trollboy:~$ echo $DISPLAY
> 0:0.
>
> --snip--
>
> As you can see, the display id is available in the environment.
>

I figure you somehow override the DISPLAY settings or the xauth settings
in your shell startup scripts.

What is the output of the following two:

echo $DISPLAY
xlsclients




> Also, setting 'xhost +' in a .xinitrc file does not affect this behaviour.

This should not be required.

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On Wed, Jun 25, 2008 at 3:34 PM, Tzafrir Cohen <tzafrir@cohens.org.il> wrote:

> What is the output of the following two:

> echo $DISPLAY

As noted:

$ echo $DISPLAY
0:0.

> xlsclients

$ xlsclients
xlsclients: unable to open display "0:0."

What scripts might be monkeying with xauth?

--
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not a looney! Why should I be tarred with the epithet looney merely
because I have a pet halibut?


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"Eric d'Alibut" <eric.halibut@gmail.com> writes:

>If
>I then start an xterm and attempt to launch an X app, such as gqview,
>or evince, from the command prompt in that xterm, no app launches;
>this is what I get:

>--snip--

>wingnut@trollboy:~$ gqview
>(gqview:26337): Gtk-WARNING **: cannot open display:

>wingnut@trollboy:~$ evince
>(evince:28047): Gtk-WARNING **: cannot open display:

>wingnut@trollboy:~$ echo $DISPLAY
>0:0.

That DISPLAY variable is wrong. It should be :0.0

If you can launch an xterm, then at that point in time $DISPLAY must be
correct. Once at the command line, it is wrong though. I would be looking
in your .bashrc or equivalent shell rc file (if you use a different shell)
and see if you have any manipulation of $DISPLAY in there.


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On Wed, Jun 25, 2008 at 9:03 PM, Cameron Hutchison <lists@xdna.net> wrote:

>>wingnut@trollboy:~$ echo $DISPLAY
>>0:0.

> That DISPLAY variable is wrong. It should be :0.0
Bingo. You get the Eagle Eye Award!

Sure enough, and Lord Only Knows why, I had put an 'export
DISPLAY=0:0.' into my .bashrc. Pilot error. Duh.


Best,

--
No no no, my fish's name is Eric, Eric the fish. He's an halibut. I am
not a looney! Why should I be tarred with the epithet looney merely
because I have a pet halibut?


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Am 2008-06-25 14:05:45, schrieb Eric d'Alibut:
> wingnut@trollboy:~$ gqview
> (gqview:26337): Gtk-WARNING **: cannot open display:
>
> wingnut@trollboy:~$ evince
> (evince:28047): Gtk-WARNING **: cannot open display:
>
> wingnut@trollboy:~$ echo $DISPLAY
> 0:0.

??? -- This should be ":0.0"

Try to run

DISPLAY=:0.0 gqview

which should work.

Thanks, Greetings and nice Day/Evening
Michelle Konzack
Systemadministrator
24V Electronic Engineer
Tamay Dogan Network
Debian GNU/Linux Consultant


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