Connecting to a modern Xserver with an old client

[Dave Howorth]

On Sat, 22 Jul 2023 10:05:33 +0100
Carsten Haitzler <raster at rasterman.com> wrote:

> On Sat, 22 Jul 2023 01:18:29 +0000 (UTC) Michael K <vk2bea at yahoo.com>
> said:
> 
> > I'm trying to connect an old HP logic analyzer (circa 1998) to a
> > modern Xorg server. The error message I get is ...
> > 
> > Xlib: connection to "192.168.1.1:1.0" refused by server
> > Unable to open window on "192.168.1.1:1.0"
> > 
> > I have executed "xhost +" to allow access by any client and I am
> > able to generate an xterm window from another modern computer on
> > the network "xterm -display 192.168.1.1:1.0". I have no way to know
> > what the logic analyzer is actually trying to do or what it doesn't
> > like.
> > 
> > On the X server side, it's started by gdm & I can't find out how to
> > change the log level of Xorg (I think there is some gdm code that
> > starts Xorg) ... /usr/libexec/Xorg vt2 -displayfd 3
> > -auth /run/user/1000/gdm/Xauthority -listen tcp -background none
> > -noreset -keeptty -novtswitch -verbose 7 -core  
> 
> :1.0 (:1) is your problem i think. your X will be on :0 (port 6000).
> the above error indicates it'd after something on :1 (port 6001).
> also double check something is listening on 192.168.1.1 as opposed to
> only on 127.0.0.1

He said (see above): 'I am able to generate an xterm window from another
modern computer on the network "xterm -display 192.168.1.1:1.0".'

So it seems there is an X server on :1.0

> > What might be the issue with this old X client authenticating with
> > a modern X server?