grub2

[Patrick Dupre]

> ----- Original Message -----
> From: Chris Murphy
> Sent: 05/05/14 07:35 AM
> To: Community support for Fedora users
> Subject: Re: grub2
> 
> On May 4, 2014, at 4:33 PM, Patrick Dupre <pdupre at gmx.com> wrote:
> 
> > Hello,
> > 
> > After the installation of a new kernel (typically during an update).
> > There is a change of the file /boot/grub2/grub.cfg.
> > 
> > However, the new menuentry created is not correct.
> > The new one includes
> > linux /vmlinuz-3.14.2-200.fc20.x86_64 root=/dev/mapper/VolGrpSys_DK1-root
> > which wrong.
> > I can change it manually.
> > 
> > I cannot guess where the information is found!
> > the 
> > set root='lvm/VolGrpSys_DK1-root'
> > 
> > is correct
> 
> The first one looks correct, the second one doesn't. Can you either post the entire grub.cfg, or you can also edit an older entry and check what root= it uses. For any rootfs on LVM, I expect root=/dev/mapper/VG-LV. When updating the kernel, it calls grubby, which should just create a new entry based on a previous entry only updating the name of the kernel and initramfs accordingly. I haven't seen it change the root entry.
> 
> The other thing you can do is create a new grub.cfg from scratch by using 
> 
> grub2-mkconfig -o /boot/grub2/grub.cfg
> 
> This is the same command the installer used when Fedora was installed.
> 
Thank you for the information.
When I run grub2-mkconfig -o /boot/grub2/grub.cfg.test
the generated file is correct.
I am not able to reproduce manually what happens during the 2 last kernal updates.
I will check again after the next update.

===========================================================================
 Patrick DUPRÉ                                 | | email: pdupre at gmx.com
 Laboratoire de Physico-Chimie de l'Atmosphère | |
 Université du Littoral-Côte d'Opale           | |
 Tel.  (33)-(0)3 28 23 76 12                   | | Fax: 03 28 65 82 44
 189A, avenue Maurice Schumann                 | | 59140 Dunkerque, France
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