As root
Edit your GDM Init file - This runs at machine boot.
vi /etc/gdm/Init/Default
On the client machine add the following line near the end of the file before the line with exit.
/usr/bin/synergyc -n {ClientName} {ServerName}
Replace ClientName with the machine name being installed on. Replace Server Name with the name (or IP) of the machine with the keyboard plugged in.
On the server machine:
Launch synergy, configure the screen geometry as desired. Save the configuration file. Move the configuration file to /etc/synergy.conf. Make sure file is owned by root
chown 0:0 /etc/synergy.conf
Edit your GDM Init file - This runs at machine boot.
vi /etc/gdm/Init/Default
add the following line near the end of the file before the line with exit.
/usr/bin/synergys
If you change clients or screen configuration, repeat the save and file move for synergy.conf