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RE: FW: grub-efi with latest mac mini


From: John Frankish
Subject: RE: FW: grub-efi with latest mac mini
Date: Thu, 21 Jun 2012 05:38:43 +0000

> > >>> -----Original Message-----
> > >>> From: address@hidden
> > >>> [mailto:grub-devel-
> > >>> address@hidden On Behalf Of Vladimir 'f-
> > >>> coder/phcoder' Serbinenko
> > >>> Sent: Monday, 11 June, 2012 01:39
> > >>> To: address@hidden
> > >>> Subject: Re: FW: grub-efi with latest mac mini
> > >>>
> > >>> Can you give as exact reference about your mac?
> > >>>
> > >>> --
> > >>> Regards
> > >>> Vladimir 'φ-coder/phcoder' Serbinenko
> > >>
> > >> From dmesg:
> > >>
> > >> DMI 2.4 present.
> > >> DMI: Apple Inc. Macmini5,3/Mac-7BA5B2794B2CDB12, BIOS
> > >> MM51.88Z.0075.B00.1106271442 06/27/2011 Mac mini server - quad-
> core
> > >> i7 - 8gb ram - single 250gb ssd
> > >
> > > For some reason, I don't seem to be able to leave this alone...
> > >
> > > Some more testing:
> > >
> > > 1. I can boot from a usb stick on a dell latitude e6220 using uefi
> > > without problems. If I take the same usb stick and try to boot on
> > > the mac
> > mini using efi from power-on <alt gr>, it boots to X, but the usb
> > keyboard/mouse do not work.
> > >
> > > 2. Using the same version of grub2.00~beta6, installed in the same
> > > way, on the first (gpt) partition of the mac mini hd (ssd), it
> > > appears to start
> > booting, but the screen remains blank.
> > >
> > > 3. With both usb stick/hd (ssd) boot on the mac mini, the grub-efi
> > command line works and the following switches video mode:
> > >
> > > insmod font
> > > loadfont unicode
> > > insmod efi_gop
> > > insmod gfxterm
> > > set gfxterm=auto
> > > terminal_output gfxterm
> > >
> > > With the usb stick boot, nothing is echoed to the screen after boot
> > > from the grub prompt until the kernel kmode driver loads, with the
> > > hd
> > (ssd) boot nothing is echoed to the screen at all.
> > >
> > > What I have difficulty understanding is that the usb stick boot
> > > fails in one way and the hd (ssd) boot fails in a different way on
> > > the same machine. Note that grub.cgf was copied from the usb stick
> > > to the hd
> > > (ssd) and the only change made was the location of the kernel/initrd
> > > -
> > > (hd2,gpt2) -> (hd1,gpt4)
> > >
> > > Any ideas?
> > >
> >
> > Did you modify the UUIDs in grub.cfg?
> >
> Sorry, but what do you mean by that - I've tried referencing the usb stick
> UUID in the kernel boot line on the usb stick, (it didn't change anything) but
> not on the hd (ssd) boot.
> 
> ..Perhaps you mean something else?

Ah - I presume you meant something like this:

search --no-floppy --fs-uuid --set=root e94de7a3-149b-4554-bc02-6129467534a9

menuentry "core" {
  linux /boot/vmlinuz quiet noswap
  initrd /boot/core.gz
}

..where the uuid refers to the 2nd, ext2, partition on the usb stick.

This makes the usb stick "portable" between dell laptop and mac mini, but 
doesn't solve the problem of the mac mini not booting


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