Dualboot Ubuntu / OSX resolution problem :s

[gbdcrew]

Hi,
I have instal osX on my computer and everything work fine but i have a problem now :s.
I installed ubuntu and now when i boot in OSX grub switch my screen to 1600x1200 and my screen only suport 1280x1024 :s
How can i edit grub to load correctly my screen in OSX ?


thx.

 

[gbdcrew]

edit :
I have move grub on the linux partition but now i haven't any bootloader xD but iboot show my linux partition.
How can i reinstal charmeleon ?