Downgrading GDM to version 2.20 on CentOS

Sun Ray Server Software requires GDM <= 2.20. Unfortunately contemporary (i.e. up-to-date) Linux distros do not offer outdated GDM. However GDM is surprisingly easy to build from source on CentOS.

Step 1: Get GDM 2.20 source

wget http://download.gnome.org/sources/gdm/2.20/gdm-2.20.11.tar.bz2

tar xf gdm-2.20.11.tar.bz2

cd gdm-2.20.11

Step 2: Edit gdm-2.20.11/daemon/gdm-net.c

Change

#define MAX_CONNECTIONS 15

to

#define MAX_CONNECTIONS 100

(Prevents GDM from hanging when all your Sun Ray terminals connect)

Step 3: Install dependencies

su

yum install audit-libs-devel \

libglade2-devel \

libart_lgpl-devel \

libgnomecanvas \

libgnomecanvas-devel \

librsvg2-devel \

dbus-glib-devel \

popt-devel \

gnome-doc-utils

Step 4: Configure and make a dirty install

./configure

make

make install

Step 5: Logout and test

gdm –version

GDM 2.20.11

Leave a comment if the above didn’t work. This was done on a CentOS 6.3 64-bit machine.