dmidecode not working with grub2 and efi native mode

[Roberto Sassu]

Hello all 

i have a Macbook Pro 5,3 and i'm able to run GRUB2 in efi native mode with thel atest kernel 2.6.32.5. I have an issue:
when executing the dmidecode command, it returns the error "No SMBIOS nor DMI entry point found". Then, after googling i followed these instructions:

- run the system in bios compatible mode and dump the bios information by executing: dd if=/dev/mem of=/boot/bios.bin bs=16384 skip=48 count=16
- add the line "loadbios /boot/bios.bin" in grub.cfg and launch the boot process in efi native mode.

This works until i have the machine on. After shutdown and the restart of the machine the file is no longer valid and the dmidecode command fails.
I use grub2 in chain with refit. There's a method to load the bios information without regenerating every time i turn the machine on?

Another issue is that running the system in efi native mode i'm not able to adjust the brightness. This might be connected with the first issue, but even if the dmidecode command works by loading a valid bios file, the problem doens't disappear.

Any suggestion?