Hi Thomas,


Below are some notes that might help you.






When the xorg branch of Guac is built the resulting libraries typically go to 
/usr/lib64/xorg/modules/, but this could vary by OS/xorg installation.

- (as the root user) chmod 755 /usr/lib64/xorg/modules/drivers/guac_drv*

- (as the root user) ldconfig


The xorg.conf file typically goes in /etc/X11/xorg.conf.d/, but this could vary 
by OS/xorg installation.


- Set the access permissions for the config file: chmod 644 xorg.conf


To allow external connections:

- Edit /usr/bin/startx script to listenarg="-listen tcp" instead of 
listenarg="-nolisten tcp"


The X server also uses a host-based access control list for deciding whether or

not to accept connections from clients on a particular machine. If no other

authorization mechanism is being used, this list initially consists of the host

on which the server is running as well as any machines listed in the file

/etc/Xn.hosts, where n is the display number of the server. Each line of the

file should contain either an IP Address, Internet hostname (e.g. 
expo.lcs.mit.edu) or a

DECnet hostname in double colon format (e.g. hydra::) or a complete name in the

format family:name as described in the xhost(1) manual page. There should be no

leading or trailing spaces on any lines. For example:








Determine if xauth is being used.


# xauth

xauth> list


If the above command sequence does not show any host other than the localhost, 
than xauth is not being used.

Search the system for an X*.hosts file, where "*" is a display number used to 
limit X window connections.

If no files are found, X*.hosts files are not being used. If the X*.hosts files 
contain any unauthorized hosts, this is a finding.

If both xauth and X*.hosts files are not being used, this is a finding.



To turn off xauth

- Edit /usr/bin/startx script to enable_xauth=0 instead of enable_xauth=1



To start the X Server without an X application using display 1:

startx -- :1 -ac -config /etc/X11/xorg.conf.d/xorg.conf &

(-ac shuts off access control for this instance)


To start the X Server with an X application usong display 1:

startx /path/to/application -- :1 -ac -config 


To start the X Server with LXDE lightweight desktop using display 0 (if 

startx /usr/bin/startlxde -display :0 -- :0 -ac -config 
/etc/X11/xorg.conf.d/xorg.conf &


startx must be run from the console, not from within an X session.


startx needs an absolute path to the program.


Everything before '--' is executed as a command after the server is running. 
Everything after '--' gets passed to the server.

':1' is the display name. It must be unique (default is ':0').

startx (or more accurately, the X server), searches /etc/X11/ for the file you 
specify with the -config option. For more details, run man Xorg.



How to debug X problems (Fedora)





From: Tom Astle <t...@pcc.com>
Reply-To: "user@guacamole.apache.org" <user@guacamole.apache.org>
Date: Monday, March 12, 2018 at 3:45 PM
To: " user@guacamole.apache.org" <user@guacamole.apache.org>
Subject: EXT: how to get the xorg driver working


I recompiled Mike Jumper’s xorg branch and installed it on my CentOS 7 server


I placed the xorg.conf file where it typically would land, but I’m not sure how 
one starts the Xserver so that it uses the guac xorg.conf?


Any ideas would be most appreciated.


​​Thomas Astle 
System Administrator 
Red Hat Certified System Administrator 
Phone: (800)722-1082


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