In order to fix the resolution of Ubuntu, that by default comes as small as 600x400, I suggest to work on the X11 config file to try to achieve a more flexible setting that would enable your monitor set-up to go wider.

The change is very easy

1. Access the system as root -
   su
2. edit (open) /etc/X11/xorg.conf . I use gedit so you can try to type this command
   gedit /etc/X11/xorg.conf
3. Replace the configuration into the Section "Monitor" part with the following and then save, IMPORTANT TAKE A BACKUP OF xorg.conf
   Section "Monitor"
   Identifier    "Configured Monitor"
   HorizSync    30-85
   VertRefresh    48-120
   EndSection
4. Restart the diplay manager or restart the system to make the change effective
   /etc/init.d/gdm restart
   

The above is doing the job on my system so I am finally able to load a better resolution screen from RealVNC to access the server remotely.

If you have an alternative method or you wish to send me some comments on this article please feel free to do so on the contact form.