Technical:XdmChooser

From K12LTSP Wiki

This page is dated... can someone with experience with 4.0 and 4.1 give us an update on how to config xdm? Many thanks==== ====

We got this to work and I'm posting the choice bits that seem to have done the trick. We are going to go through this again to polish our internal documentation and I'll post the results. Kevin M.

<verbatim> Assumptions: You are using gdm for your login manager. Changes to /etc/X11/gdm/gdm.conf

 security
 AllowRoot=false
 AllowRemoteRoot=false

 xdmcp
 HonorIndirect=true
 MaxSessions=50
 MaxWait=5
 MaxWaitIndirect=5
 Port=177
 Willing=/etc/X11/gdm/Xwilling

 greeter
 ChooserButton=false

 chooser
 AllowAdd=false

</verbatim>

And this is where the magic is: <verbatim> Change one line in /opt/ltsp/i386/etc/screen.d/startx

 Old line: XFARGS="-query ${XDMSERVER}"
 New line: XFARGS="-indirect ${XDMSERVER}"

</verbatim>

After making the changes log everyone out and run the "gdm-restart" command and you should be set.

Technical:KdmChooser

<verbatim>

Here's a real-quick XDM chooser HOWTO. This is how I set up Riverdale High School's new servers, it may or may not be the best way to do it but it is known to work ;-)

This assumes that your servers default to KDE. I have not tried this under GNOME or straight XDM.

1) Pick out one server to be your main server. Point DHCP to this one server.

2) On the main server, export the /home directory read/write. If your IP range

  is 192.168.0.0/24, for example, you would add the following line to
  /etc/exports

home 192.168.0.0/255.255.255.0(rw)

  and then run the following command:

exportfs -a

3) Configure the other servers to mount /home from the main server.

  If your main server is 192.168.0.254, for example, you would add the
  following line to the "/etc/fstab" file on all of the other LTSP servers:

192.168.0.254:/home /home nfs defaults,rsize8192,wsize8192 0 0

 and then run the following command:

mount /home/

4) The default "chooser" is pretty ugly, so we're going to spice it up a little.

  start by creating the file /etc/X11/xdm/pretty-chooser with the following
  lines:

#====/bin/sh ==== /usr/X11R6/bin/xsetroot -solid skyblue4 exec /etc/X11/xdm/chooser $*

  make this file executable with the following command:

chmod +x /etc/X11/xdm/pretty-chooser

  Next append the following lines to /etc/X11/xdm/Xresources

Chooser*geometry: 500x200+300+225 Chooser*allowShellResize: false Chooser*ShapeStyle: Oval Chooser*viewport.forceBars: true Chooser*label.label: Application Servers Chooserlabel.font: --bold-i-normal--240-* Chooser*list.font: -misc-fixed-medium-r-semicondensed--13-120-75-75 -c-60-iso8859-1 ChooserCommand.font: --bold-r-normal--180-* Chooser*Form.background: gray80 Chooser*label.foreground: white Chooser*label.background: midnightblue Chooser*Command.background: gray80 Chooser*internalBorderColor: black ChooserCommand.font: -adobe-helvetica-bold-r---12- Chooser*viewport.useRight: false Chooser*list.columnSpacning: 25 Chooser*list.defaultColumns: 1 Chooser*list.verticalList: true

5) Limit the list in the chooser to just the servers you want listed.

  Edit /etc/X11/xdm/Xaccess, commenting out all of the existing lines, and
  then appending the following lines:

* CHOOSER server1 server2 server3 sever4 * CHOOSER BROADCAST #any indirect host can get a chooser * # any host can get a login window

  be sure to replace "server1", "server2", etc with the real names of the
  servers.

6) In /etc/X11/xdm/kdmrc (this is the KDE specific part), uncomment the

  Resources and Choosers lines, setting them to the following values:

Resources=/etc/X11/xdm/Xresources Chooser=/etc/X11/xdm/pretty-chooser

7) In /opt/ltsp/i386/etc/rc.local, change all occurances of "-query" to

  "-indirect", such as:

echo "/usr/X11R6/bin/${XBINARY} ${XOPTS} ${ACCCTRL} -indirect ${XDMSERVER}" >/tmp/start_ws

8) Fire up a terminal and see if it works ;-)

</verbatim>

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We're not having much luck with this set-up. Is anyone using this with 4.1? Could you post the choice bits of your history file for comparison?

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Here is a link to the thread that this text was taken from: https://listman.redhat.com/archives/k12osn/2002-September/msg00118.html