Preseeding answer to grub installation disk

[Stephen Wood]

Wow Tom. That is incredibly useful.

I am unable to translate what I'm seeing in the logs into a workable d-i
preseed command that will answer the prompt and continue.

The logs show this when I am stopped with the prompt:

Dec  9 07:30:35 debconf: --> SET grub-installer/bootdev /dev/sdm
Dec  9 07:30:35 debconf: <-- 0 value set
Dec  9 07:30:35 debconf: --> PROGRESS STEP 1
Dec  9 07:30:35 debconf: <-- 0 OK
Dec  9 07:30:35 debconf: --> PROGRESS INFO
grub-installer/progress/step_bootdev
Dec  9 07:30:35 debconf: <-- 0 OK
Dec  9 07:30:35 debconf: --> INPUT critical grub-installer/bootdev
Dec  9 07:30:35 debconf: <-- 0 question will be asked
Dec  9 07:30:35 debconf: --> GO

If I hit enter and the installations continues, it goes on to this:

Dec  9 07:30:35 debconf: --> SET grub-installer/bootdev /dev/sdm
Dec  9 07:30:35 debconf: <-- 0 value set
Dec  9 07:30:35 debconf: --> PROGRESS STEP 1
Dec  9 07:30:35 debconf: <-- 0 OK
Dec  9 07:30:35 debconf: --> PROGRESS INFO
grub-installer/progress/step_bootdev
Dec  9 07:30:35 debconf: <-- 0 OK
Dec  9 07:30:35 debconf: --> INPUT critical grub-installer/bootdev
Dec  9 07:30:35 debconf: <-- 0 question will be asked
Dec  9 07:30:35 debconf: --> GO
Dec  9 07:37:20 debconf: <-- 0 ok
Dec  9 07:37:20 debconf: --> GET grub-installer/bootdev
Dec  9 07:37:20 debconf: <-- 0 /dev/sdm
Dec  9 07:37:20 debconf: --> PROGRESS STEP 1
Dec  9 07:37:20 debconf: <-- 0 OK
Dec  9 07:37:20 debconf: --> SUBST
grub-installer/progress/step_install_loader BOOTDEV /dev/sdm
Dec  9 07:37:20 debconf: Adding [BOOTDEV] -> [/dev/sdm]
Dec  9 07:37:20 debconf: <-- 0
Dec  9 07:37:20 debconf: --> PROGRESS INFO
grub-installer/progress/step_install_loader
Dec  9 07:37:20 debconf: <-- 0 OK
Dec  9 07:37:20 grub-installer: info: Installing grub on '/dev/sdm'
Dec  9 07:37:20 grub-installer: info: grub-install supports --no-floppy
Dec  9 07:37:20 grub-installer: info: Running chroot /target grub-install
 --no-floppy --force "/dev/sdm"
Dec  9 07:37:22 grub-installer: Installation finished. No error reported.
Dec  9 07:37:22 grub-installer: info: grub-install ran successfully
...

It's not clear to me exactly what the prompt is. Is it this?

Dec  9 07:37:20 debconf: <-- 0 ok

If that's the case, how do I input an "ok"?


On Sat, Dec 7, 2013 at 3:46 AM, Tom H <tomh0665 at gmail.com> wrote:

> On Sat, Dec 7, 2013 at 12:30 AM, Stephen Wood <smwood4 at gmail.com> wrote:
> >
> > Can someone help me preseeding the answer to this prompt when installing
> > the grub boot loader to a disk other than /dev/sda?
> >
> > I've tried the following things, but I still get prompted with this
> question. I'd
> > like it to just continue:
> >
> > d-i grub-installer/only_debian boolean false
> > d-i grub-installer/with_other_os boolean false
> > d-i grub-installer/bootdev  string /dev/sdm
> >
> > And also
> > d-i grub-installer/only_debian boolean true
> > d-i grub-installer/with_other_os boolean true
> > d-i grub-installer/bootdev  string /dev/sdm
> >
> > And also adding:
> > d-i grub-pc/install_devices multiselect /dev/sdm
> >
> > Regardless of what I add I still get the prompt. Note that /dev/sdm is
> also where
> > the OS installation resides.
>
> The "also" looks like what I use but I haven't done a preseeded
> install for a while so maybe something's changed.
>
> Add "DEBCONF_DEBUG=5" to the kernel cmdline and, when your install
> stalls, switch to vt4 to find out which preseed variable is needed.
>
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-- 
Stephen Wood
www.heystephenwood.com
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