[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: Configure GRUB 2

On 08/11/2012 09:01, Lisi Reisz wrote:

On Thursday 08 November 2012 05:02:23 Tom H wrote:

On Wed, Nov 7, 2012 at 5:55 PM, Lisi Reisz<lisi.reisz@gmail.com>  wrote:

As I understand the GRUB manual, if I want to change the config file,
then i have to edit /etc/default/grub.  I want to change the order of the
kernels in GRUB, but I can't see any kernels at all in /etc/default/grub.
(See below.) So how do I boot from the earlier kernel?


We need more information.

Are you trying to re-order the kernels of the installation where
grub's installed or the kernels of other installations?


I have upgraded the kernel rather disastrously and want to go back by default
to the older kernel.  I also want to find out how to do this, since in GRUB 1
it was extremely easy.  I then want to compile the older kernel to have the
correct, older video drivers; which at present it hasn't, which is the
problem.  It has the wrong video drivers, or rather, hasn't got the right
ones.

And yes, the two kernels where GRUB is installed.  I simply can't see any menu
there, so how do I alter the menu order?  I'll put the /etc./default/grub
file below my signature again.

Thanks,
Lisi


In /etc/default/grub put :

GRUB_DEFAULT=1

First kernel (higher version number) is "0", so "1" is the second.
If by "menu" you mean grub2 equivalent of "menu.list" then "/boot/grub/grub.cfg" is what you are looking for. This file is recreated every time "update-grub" or "grub-mkconfig" is run (which you must do after modifying /etc/default/grub). Instead of using the menu.cfg you can create any custom entry you'd like using a /etc/grub/40_custom . "40" is just a hint here, choose what you want, but you should find a template with this number in the /etc/grub directory. All files there are sourced when "update-grub" is run and used to generate grub.cfg. 

Hope it helps.
Reply to: