Macbook(5,2) freeze at grub after install ubuntu 9.04

[pie_2009]

Hi,

I just bought a macbook(5,2), and installed ubuntu 9.04 by using boot camp assistant and rEFit. But After installed it, the macbook freeze at grub when it rebboot:(. Is anybody can give me a detail procesure about how to solve this problem? Thanks

[ercoppa]

There is no solution with Jaunty, maybe with Karmic Koala. See this (https://help.ubuntu.com/community/MacBookPro5-1_5-2/Jaunty#Reboot).