Re: [gentoo-user] Re: grub2 defaults

[Neil Bothwick <neil@digimed.co.uk>]

[-- Attachment #1: Type: text/plain, Size: 1682 bytes --]

On Wed, 26 Mar 2014 14:42:51 +0000 (UTC), James wrote:

> > > So when I get the Grub2 (ascii) boot menu and just select the 
> > > default, it boots kernel-3.13.7-gentoo, despite 
> > > 'kernel-3.13.6-gentoo' being set in as the default for Grub2?  
> 
> > DEFAULT, if not set to a number, matches the title or --id of a menu
> > entry, not the kernel name (you could have several entries with the
> > same kernel).  
> Do you have syntax examples for --id, or is that just a generic
> descriptor?

--id "some string" - it's in the info pages.

> So would the option for local kernel versioning built into the 
> kernel be recognized by grub2 to distinguishing between differnent
> (locale) versions of the same kernel version?
> 
> menuconfig-->  General Setup-->  Local version-append to kernel release 
> ???

You want the name of the menuentry, not the name of the kernel. I use a
custom script to generate the entries, but running the standard 10linux
script here produces entries like

menuentry 'GNU/Linux, with Linux 3.13.7-gentoo'

You would need to match on that for DEFAULT.

> OR:
> So how do I know which number matches which kernel, since using the
> name does not match them up as desired to select to boot?

By looking at grub.cfg. Unfortunately, this changes each time you add a
kernel, the number for that older one increments each time.

If you have a particular entry you want to boot, you may be better off
defining a menu entry for it in /etc/grub.d/40_custom, then you can set
the name for it and your DEFAULT setting should work.


-- 
Neil Bothwick

Micro-: (prefix) anything both very small and very expensive.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 198 bytes --]