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Re: Bug#821340: debian installer bug: doesn't partition with gpt for uefi install

On Sun, Apr 17, 2016 at 10:19:54PM +0200, josh wrote:
>Package: installation-reports
>Boot method: CD
>Image version: 8.3 amd64 netinstall
>Date: March 2016
>Machine: custom built
>Processor: amd A10 7850k
>Memory: 8gb
>Partitions: <df -Tl will do; the raw partition table is preferred>
>After installation system was not bootable.
>During the installation it said that it had detected that I had UEFI
>booted the installation CD and proposed to make an EFI boot partion
>which I accepted. However, after installation, Debian wasn't bootable. I
>tracked the cause down to the fact that even though it said it was
>installing a UEFI bootable system, the hard drive was still formatted
>with an MBR, which is not UEFI boot compatible. There seemed to be no
>option for selecting/forcing gpt partitioning. Using a rescue cd and
>converting the MBR to a gpt and then reinstalling grub-uefi solved the
>problem without having to reinstall the system.
><Description of the install, in prose, and any thoughts, comments
>      and ideas you had during the initial install.>
>Except for this, the installation was very smooth, but this one problem
>unfortunately cost my a couple hours of frustration and several
>re-installs until I figured out what was wrong.
>It would seem to me that if the installer detects an uefi booted system
>and is installing an efi boot partition then it should automatically
>partition with a gpt and not an mbr.

Hi Josh,

It depends very much on the machine involved, to be honest - many will
boot UEFI from appropriately partitioned MBR-partitioned disks. It
depends very much on the firmware of the machine here. d-i
deliberately will not *by default* change partition type. If you do
need to do this, expert mode should let you do it anyway.

Steve McIntyre, Cambridge, UK.                                steve@einval.com
< sladen> I actually stayed in a hotel and arrived to find a post-it
          note stuck to the mini-bar saying "Paul: This fridge and
          fittings are the correct way around and do not need altering"

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