grub2 and fat efi files on latest Apples
Newbie post but hopefully I will be providing some useful data rather than merely questions... I have been using the svn trunk over the last few days with some success compiling 32 and 64 bit EFI grub and creating a dual architecture grub.efi from the results that seems to work on hard disk on newer and older Apple Intel Macs. I use the fatglue.py python script from refit to make the fat grub.efi. Not sure if anyone else is doing anything similar... I have observed that fat modules don't work - need to use grub-mkimage to insert all the required modules. Another interesting observation (not really grub but maybe worth comment) is that using a Linux 2.6.29.2 kernel and initrd on the newer macs in efi mode boot (uses framebuffer console) works up until the insertion of modules. It appears that some modules do insert and other don't. The same kernel and initrd booted in legacy mode (after a call to fakebios) boots fine. Finally, the reboot call from linux on the iMac 9,1 hangs - possibly an issue with fakebios??? If the output of grub-dumpbios is any use let me know... Models tested (all intel) macmini iMac 4,1 requires ia32 or fat grub.efi iMac 8,1 requires x86_64 or fat grub.efi iMac 9,1 requires x86_64 or fat grub.efi James -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. ___ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
Re: grub2 and fat efi files on latest Apples
Hi,
Thanks for the idea, here fat grub.efi tested ok on imac8,1 (64) and
MacBook2,1 (32), using working grub32.efi and grub64.efi with their
preloaded modules.
./fatglue.py grub2202f.efi grub2202-32.efi grub2202-64.efi
compile and fatglue were all done in OSX10.5.6.
Debian sid 2.6.29.1-amd64 boots for me on imac8,1 using
menuentry sid amd64 fbdev sda9 {
fakebios
root=hd0,9
linux /vmlinuz root=/dev/sda9 video=efifb noefi
initrd /initrd.img
}
On Thu, May 14, 2009 at 1:35 AM, James Jarvis james.jar...@ed.ac.uk wrote:
Newbie post but hopefully I will be providing some useful data rather than
merely questions...
I have been using the svn trunk over the last few days with some success
compiling 32 and 64 bit EFI grub and creating a dual architecture grub.efi
from the results that seems to work on hard disk on newer and older Apple
Intel Macs. I use the fatglue.py python script from refit to make the fat
grub.efi. Not sure if anyone else is doing anything similar...
I have observed that fat modules don't work - need to use grub-mkimage to
insert all the required modules.
Another interesting observation (not really grub but maybe worth comment)
is that using a Linux 2.6.29.2 kernel and initrd on the newer macs in efi
mode boot (uses framebuffer console) works up until the insertion of
modules. It appears that some modules do insert and other don't. The same
kernel and initrd booted in legacy mode (after a call to fakebios) boots
fine.
Finally, the reboot call from linux on the iMac 9,1 hangs - possibly an
issue with fakebios??? If the output of grub-dumpbios is any use let me
know...
Models tested (all intel)
macmini
iMac 4,1 requires ia32 or fat grub.efi
iMac 8,1 requires x86_64 or fat grub.efi
iMac 9,1 requires x86_64 or fat grub.efi
James
--
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.
___
Grub-devel mailing list
Grub-devel@gnu.org
http://lists.gnu.org/mailman/listinfo/grub-devel
--
Cros (pxw)
___
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Re: grub2 and fat efi files on latest Apples
Good to hear it is not just me finding it useful - certainly handy for
portable rescue media.
I take it there is no workaround (on Macs) for having a blessed hfsplus
filesystem with a blessed grub.efi - that is, on removable media
(usb/cd) for booting in efi mode (I know isolinux works fine in legacy
boot mode).
James
Peter Cros wrote:
Hi,
Thanks for the idea, here fat grub.efi tested ok on imac8,1 (64) and
MacBook2,1 (32), using working grub32.efi and grub64.efi with their
preloaded modules.
./fatglue.py grub2202f.efi grub2202-32.efi grub2202-64.efi
compile and fatglue were all done in OSX10.5.6.
Debian sid 2.6.29.1-amd64 boots for me on imac8,1 using
menuentry sid amd64 fbdev sda9 {
fakebios
root=hd0,9
linux /vmlinuz root=/dev/sda9 video=efifb noefi
initrd /initrd.img
}
On Thu, May 14, 2009 at 1:35 AM, James Jarvis james.jar...@ed.ac.uk
mailto:james.jar...@ed.ac.uk wrote:
Newbie post but hopefully I will be providing some useful data
rather than merely questions...
I have been using the svn trunk over the last few days with some
success compiling 32 and 64 bit EFI grub and creating a dual
architecture grub.efi from the results that seems to work on hard
disk on newer and older Apple Intel Macs. I use the fatglue.py
python script from refit to make the fat grub.efi. Not sure if
anyone else is doing anything similar...
I have observed that fat modules don't work - need to use
grub-mkimage to insert all the required modules.
Another interesting observation (not really grub but maybe worth
comment) is that using a Linux 2.6.29.2 kernel and initrd on the
newer macs in efi mode boot (uses framebuffer console) works up
until the insertion of modules. It appears that some modules do
insert and other don't. The same kernel and initrd booted in
legacy mode (after a call to fakebios) boots fine.
Finally, the reboot call from linux on the iMac 9,1 hangs -
possibly an issue with fakebios??? If the output of grub-dumpbios
is any use let me know...
Models tested (all intel)
macmini
iMac 4,1 requires ia32 or fat grub.efi
iMac 8,1 requires x86_64 or fat grub.efi
iMac 9,1 requires x86_64 or fat grub.efi
James
--
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.
___
Grub-devel mailing list
Grub-devel@gnu.org mailto:Grub-devel@gnu.org
http://lists.gnu.org/mailman/listinfo/grub-devel
--
Cros (pxw)
___
Grub-devel mailing list
Grub-devel@gnu.org
http://lists.gnu.org/mailman/listinfo/grub-devel
--
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.
___
Grub-devel mailing list
Grub-devel@gnu.org
http://lists.gnu.org/mailman/listinfo/grub-devel
