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Re: How to install wheezy uefi + gpt (was: Install debian on EFI hw)

On Mon, Mar 24, 2014 at 03:49:49PM -0300, André Nunes Batista wrote:
> On Tue, 2014-03-04 at 18:55 +0000, Andrew M.A. Cater wrote:
> > On Tue, Mar 04, 2014 at 02:54:05PM +0100, ha wrote:
> > > Last few weekends I've tried to install debian 7.2 from live DVD
> > > (but booting from USB) on EFI hardware with GPT. I disabled EFI,
> > > crated a small partition at the begging of the disk, and run the
> > > usual installation process. However, at the end of installation I
> > > always receive the message like: "Grub-pc package failed to install
> > > into /target/".
> > > 
> > > Now, I solved this by booting to rescue mode, doing grub-install, chroot
> > > into the instaled system and simply update grub. However, I found
> > > this solution suboptimal when compared to classical debian
> > > installation (utilizing MBR). So I wonder if anybody had experience
> > > on how to avoid this recue-grub_install-chroot-grub_update
> > > procedure?
> > > 
> > > Did anybody manage to automatically install debian on GPT?
> > > Did anybody do it without disabling EFI (grub-efi perhaps)?
> > > Or the only way to have the automated install is stick with MBR?
> > > 
> > > Thanks to anybody who cares.
> > > Archive: [🔎] lf4lk1$umi$1@ger.gmane.org">https://lists.debian.org/[🔎] lf4lk1$umi$1@ger.gmane.org
> > 
> > 
> > Debian DVD1 / netinst .iso's both will allow you to boot from EFI and install
> > for Debian 7 Wheezy. I'm not sure whether the default install installs GPT on 
> > smaller disks but it certainly worked when I tried it a while ago with no problems.
> > 
> > YOu may, however need to do an expert install rather than an automated install,
> > which I'd recommend anyway since it means that you have greater control over how
> > the install proceeds.
> > 
> > Hope this helps,
> > 
> > AndyC
> Hello dears,
> This thread on debian-devel might serve as future reference here on
> debian users, since the procedure to install debian wheezy with UEFI
> enabled requires expert install mode and it is by no means
> straightforward:
> https://lists.debian.org/debian-devel/2012/01/msg00168.html
> Also: http://tanguy.ortolo.eu/blog/article51/debian-efi
> Last week I finally got one of those new machines to try and install
> debian wheezy and had no problems doing it, installation was a success,
> uefi is enabled but secure boot has to be set on custom mode since
> debian is not signed with vendor keys. Is there anyway to create my own
> keys to sign the bootloader and make use of the secure boot feature in
> user respecting way?
> How to install (for tl;dr users):
> You need to:
> 1. setup BIOS/UEFI on legacy mode;
> 2. start debian installer on expert mode in order to be able to 
> 3. create a GUID Partition Table (gpt), using partman and moving away
> from the default msdos partition scheme;

You _may_ find that, if you boot from UEFI only and select expert mode,
that it will work out of the box.

I did this the other day and on my hardware (Zotac Zbox AD06) I did not
need to hand create a GPT partition.

The auto-partitioning mode created a 1MB partition at the beginning and
end of the disk and a 512MB partition for the EFI boot.

If done this way booting from UEFI at the beginning, you should 
get only grub-efi installed.

> 4. create TWO partitions right at the begging of the disk:
> 4.1. the first with 1Mib must be left unformatted and flagged as
> Reserved space for boot (my understanding is that this area is used to
> guaranteed that in the end, when grub is installed to MBR, it does not
> overwrite our GPT scheme);
> 4.2. the other one must be formatted as FAT32 filesystem and needs to be
> greater than 32MB (? I failed when I tried to create a fat32 with
> smaller sizes - 1MB and 10MB, but this 32 is just a wild guess, my
> successful attempt was with 64MB). This partition will be used to store
> the bootloader and should be mounted as /boot/efi.
> 5. from here on you can proceed and install as would normally do. You
> may safely install grub to MBR at the end of the procedure.
> 6. Boot the system still in Legacy mode then install the package
> grub-efi-amd64 (apt-get install grub-efi-amd64);
> 7. run
> # grub-install /dev/sda (this will fail, since you are not on efi
> enabled mode)
> 8. run
> # cp /boot/efi/efi/debian/grubx64.efi /boot/efi/efi/boot/bootx64.efi
> 9. run again
> # grub-install /dev/sda
> 10. Reboot and see if your UEFI now sees your wheezy OS.
> That should do it and you can safely set aside Legacy mode. Secure boot
> won't work. My punkself deleted the vendor keys. 

Hope this helps somebody: thanks for writing this up,

All the very best,

Andy Cater


> -- 
> André N. Batista

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