help with a Wacom Bamboo

[Gabriel Dragffy]

Hi all

I hope this email finds you well.

I have followed Ubuntu Wiki instructions for installing Ubuntu on a 
MacBook. Solving each issue, and now I have a two very important 
features working: connection to an external apple cinema display, and a 
wacom bamboo.

However, the bamboo works a treat on the macbook itself, but when 
connected to the 20" external display the bamboo allows the use of the 
pen, but in an impossibly small area. I think it allows me to use the 
pen in an area of 1280x800 (size of the macbook screen) on the 22" 
display that is 1680x1050. So as you can see I am only able to use the 
middle area of my large screen when using the pen.

Is anyone able to suggest a solution to this please?

Many thanks

Gabriel Dragffy