Re: Cannot boot from dual bios/uefi boot CD

[Andrei Borzenkov]

On Wed, Jan 28, 2015 at 11:44 AM, John Frankish
<address@hidden> wrote:
>> > On Wed, Jan 28, 2015 at 10:30 AM, John Frankish
> <address@hidden> wrote:
>> > Hi,
>> >
>> > I'm trying the create a dual bios/uefi boot iso to burn to CD/DVD and
>> > boot both bios and uefi.
>> >
>>
>> And your grub version is?
>>
> 2.00
>

Current is 2.02~beta2.

>> > The bios boot works fine
>> > On two different machines, the uefi boot gets to the grub menu list:
>> >
>> > On a dell laptop choosing the grub menu item boots to the linux
>> > console prompt, but will not accept any keyboard input
>> > On a mac mini the boot hangs without error message after choosing the
> grub menu
>> > item.
>> >
>> > Note that in both cases, I can enter grub commands from the prompt and
>> > can also edit the grub menu entries.
>>
>> And it boots after that?
>
> No, on the laptop it boots to the console prompt, but does not accept
> keyboard input
>
>> >  In addition, both the bios and uefi boot are using the same vmlinuz and
> initrd files.
>> > Finally a more standard uefi installation to usb stick boots on both
> machines without problems.
>> >
>>
>> I'm afraid I do not quite understand that. Could you be more verbose
>>
>> - what "standard uefi installation to usb stick" means?
> The grub modules are in /EFI/BOOT/grub/X86_64 rather than embedded in
> BOOTX64.EFI
>

Any reason you need to build your own image in the first place? And if
yes, what is the reason to include ata, ahci and all USB drivers?
Please build image without them (i.e. ahci ata ehci ohci uhci
usb_keyboard - hopefully I did not miss something).

>> >
>> > $ x86_64-grub-mkimage --format=x86_64-efi --output=BOOTX64.EFI
>> > --prefix=/EFI/BOOT/grub --config=/tmp/grub.cfg acpi ahci all_video
>> > appleldr at_keyboard bitmap_scale ata boot cat chain configfile cs5536
>> > echo efi_gop efi_uga ehci ext2 fat font gfxmenu gfxterm gzio halt help
>> > hfs hfsplus iso9660 jpeg keylayouts linux loadbios loadenv ls minicmd
> normal ohci
>> > part_gpt part_msdos png probe regexp reboot search search_fs_file
>> > search_fs_uuid search_label test tga true udf ufs1 ufs2 uhci
>> > usb_keyboard zfs.
>> >