Re: grub2 and fat efi files on latest Apples

[James Jarvis]

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 <address@hidden 
> <mailto:address@hidden>> 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.
>
>
>
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>
>
>
> --
> Cros (pxw)
>
>
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The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.