Et pour ne pas te descendre tu peux aller voir dans la FAQ de grub2 :
2. What is the status of GRUB 2?
It is usable, but we are still making incompatible changes from time to time. Stabilizing the features is planned in November, 2008. It is working on PC, OpenFirmware-based PowerPC machines (PowerMac and Pegasos) and EFI-based PC (IntelMac), and being ported to RiscOS/ARM, UltraSparc, and coreboot (formerly, LinuxBIOS)
[^] # Re: testing
Posté par Clément David (site web personnel) . En réponse au journal bug de grub dans lenny. Évalué à 2.
2. What is the status of GRUB 2?
It is usable, but we are still making incompatible changes from time to time. Stabilizing the features is planned in November, 2008. It is working on PC, OpenFirmware-based PowerPC machines (PowerMac and Pegasos) and EFI-based PC (IntelMac), and being ported to RiscOS/ARM, UltraSparc, and coreboot (formerly, LinuxBIOS)