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From: Todd A. Jacobs on 23 May 2010 19:40
When one has multiple kernels installed, where is one supposed to
configure the option to always boot the last-selected kernel? I can't
make sense of all the automatic over-writing that the grub scripts are
doing on Debian, and the /etc/default/grub file doesn't have an example
of what the scripts are looking for.

I just want to be able to select a kernel at boot, and have that be the
default until a new kernel is installed or I manually select something
else.

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From: Celejar on 23 May 2010 20:00
On Sun, 23 May 2010 15:56:13 -0700
"Todd A. Jacobs" <nospam(a)codegnome.org> wrote:

> When one has multiple kernels installed, where is one supposed to
> configure the option to always boot the last-selected kernel? I can't
> make sense of all the automatic over-writing that the grub scripts are
> doing on Debian, and the /etc/default/grub file doesn't have an example
> of what the scripts are looking for.
>
> I just want to be able to select a kernel at boot, and have that be the
> default until a new kernel is installed or I manually select something
> else.

What seems to work for me (and I agree, it's pretty confusing,
especially when you add 'man grub-set-default' to the mix) is to
include these three lines in menu.lst:

default saved
# updatedefaultentry=true
# savedefault=true

I'm not quite certain which are necessary, but as I've said, this seems
to give me the behavior that I (and, IIUC, you) want.

Celejar
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From: Tom H on 23 May 2010 21:40
On Sun, May 23, 2010 at 7:52 PM, Celejar <celejar(a)gmail.com> wrote:
> On Sun, 23 May 2010 15:56:13 -0700
> "Todd A. Jacobs" <nospam(a)codegnome.org> wrote:
>
>> When one has multiple kernels installed, where is one supposed to
>> configure the option to always boot the last-selected kernel? I can't
>> make sense of all the automatic over-writing that the grub scripts are
>> doing on Debian, and the /etc/default/grub file doesn't have an example
>> of what the scripts are looking for.
>>
>> I just want to be able to select a kernel at boot, and have that be the
>> default until a new kernel is installed or I manually select something
>> else.
>
> What seems to work for me (and I agree, it's pretty confusing,
> especially when you add 'man grub-set-default' to the mix) is to
> include these three lines in menu.lst:
>
> default saved
> # updatedefaultentry=true
> # savedefault=true
>
> I'm not quite certain which are necessary, but as I've said, this seems
> to give me the behavior that I (and, IIUC, you) want.

I don't think that you need "# updatedefaultentry=true" if you are
using "default saved". IIUC, I only has any meaning in the case of
"default x" where x is a number.

IIUC, "# savedefault=true" will append "savedefault" to the menu
entries and, booting from one of those entries turns it into the
default at the next boot if you choose "default saved".

I have not tried "default saved" with grub1, but with grub2 it will
not work (the first time that you set it) if you don't run
"grub-set-default x" where x is the default entry that you want (the
count starts with 0).


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From: Andrei Popescu on 24 May 2010 16:30
On Sun,23.May.10, 19:52:17, Celejar wrote:
> On Sun, 23 May 2010 15:56:13 -0700
> "Todd A. Jacobs" <nospam(a)codegnome.org> wrote:
>
> > When one has multiple kernels installed, where is one supposed to
> > configure the option to always boot the last-selected kernel? I can't
> > make sense of all the automatic over-writing that the grub scripts are
> > doing on Debian, and the /etc/default/grub file doesn't have an example
> > of what the scripts are looking for.
...
> What seems to work for me (and I agree, it's pretty confusing,
> especially when you add 'man grub-set-default' to the mix) is to
> include these three lines in menu.lst:

[snip]

That's grub1, but the OP was asking about grub2 (/etc/default/grub).

Regards,
Andrei
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From: Tom H on 24 May 2010 20:40
On Mon, May 24, 2010 at 4:24 PM, Andrei Popescu
<andreimpopescu(a)gmail.com> wrote:
> On Sun,23.May.10, 19:52:17, Celejar wrote:
>> On Sun, 23 May 2010 15:56:13 -0700
>> "Todd A. Jacobs" <nospam(a)codegnome.org> wrote:
>>
>> > When one has multiple kernels installed, where is one supposed to
>> > configure the option to always boot the last-selected kernel? I can't
>> > make sense of all the automatic over-writing that the grub scripts are
>> > doing on Debian, and the /etc/default/grub file doesn't have an example
>> > of what the scripts are looking for.
> ...
>> What seems to work for me (and I agree, it's pretty confusing,
>> especially when you add 'man grub-set-default' to the mix) is to
>> include these three lines in menu.lst:
>
> [snip]
>
> That's grub1, but the OP was asking about grub2 (/etc/default/grub).

Oops. I also gave grub1 advice...

For grub2, set "GRUB_DEFAULT=saved" in "/etc/default/grub", run
"update-grub", and run "grub-set-default x" (where x is the default
entry from which you want to boot and the count starts at 0).


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