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Re: Debian + UEFI + Install w/ USB Key

On Sun, Apr 21, 2013 at 07:50:17PM +0200, Fran R. Guerrero wrote:
> I'm building my new system and I'm wishing to install Debian on it. It's
> reasonably new and the motherboard has this UEFI thing that pisses lots of
> people around. I'm no exception.
> I tried to install Debian Wheezy with a USB key, using the 'dd' way but,
> even trying different versions of the installer, I always got a "Insert
> boot media" message when trying to boot from the USB with (at least in
> theory) Debian installer on it.
> Anybody has any tip on how to correctly make a USB install working
> (booting, at least) on a UEFI motherboard*? Any issues with the current
> installer to take into account with UEFI, partition tables and so on?

I did this recently with the current Debian installer RC.  If you
download the netinst or CD1 ISO image, you can simply dd it to
the USB pendrive directly, and it will boot with UEFI or legacy

The hardest part was getting the key to boot.  The main thing to
look out for is that "secure boot" *must* be disabled or else
you can't boot it.  My ASUS board UEFI BIOS had some annoying
bug whereby it was silently re-enabling it behind my back, causing
countless frustration as I spent hours trying to make it boot.
Also, if you can disable booting from legacy BIOS to ensure that
only the UEFI boot method shows up (the pendrive will support both,
but you can't install it properly unless you boot in UEFI mode).
Another gotcha is that the chainloader can sometimes start
booting from one medium and switch to another if you have
multiple pendrives or CDs available; note that this is mainly
an issue when secure boot is enabled, and it'll silently skip
booting from an "insecure" medium.

At least with my board, when I select the boot menu, there's a
"UEFI" label/icon for UEFI boot methods.

Good luck!  It can certainly be done, but it might take a little
experimentation to get the UEFI BIOS configured to allow it.


  .''`.  Roger Leigh
 : :' :  Debian GNU/Linux    http://people.debian.org/~rleigh/
 `. `'   schroot and sbuild  http://alioth.debian.org/projects/buildd-tools
   `-    GPG Public Key      F33D 281D 470A B443 6756 147C 07B3 C8BC 4083 E800

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