update grub2

[Stephen Morris]

On 05/19/2014 08:42 AM, Michael Schwendt wrote:
> On Mon, 19 May 2014 08:08:54 +1000, Stephen Morris wrote:
>
>>       My experience with grubby being run after kernel installs, when I
>> have been able to get it to run, is that it does recreate the entire
>> grub.cfg file. For example, I have been in the situation where the boot
>> menu had an entry for the latest kernel followed by an group entry for
>> 'Advanced Fedora Options' (or something similar) along with the same
>> structure for Ubuntu, then after running grubby, the groupings were
>> removed and all the entries that were listed in the groups were moved to
>> the top level.
> Can't confirm.
>
> These are the steps I've tested with on Fedora 20:
>
> 1) In /etc/default/grub I've set
>
>    GRUB_DISABLE_SUBMENU=false
>
> 2) I've run  "grub2-mkconfig -o /boot/grub2/grub.cfg"  to create the
>    grub.cfg with submenus.
>
> 3) I've saved grub.cfg as ~/grub.cfg.MKCONFIG
>
> 4) I've run  "yum --enablerepo=rawhide install kernel"  to add the kernel
>    package from Rawhide.
>
> 5) I've run  "diff -u ~/grub.cfg.MKCONFIG /boot/grub2/grub.cfg"  to display
>    the differences.
>
> What has changed in grub.cfg?
>
>   * a new "menuentry" block for the new kernel at the top
>   * removed trailing whitespace at the end of "linux" lines
>   * replaced double-quote characters with single-quotes in menuentry blocks
>
> Upon  "yum history undo …"  only the added menuentry block was removed
> again.
Looks like grubby has changed since the last time I used it, it is now 
creating sub-entries as well. I'll need to now check if I still get the 
same problem on kernel updates where grubby fails with an authorization 
failure even though the update process is run under sudo, but when I run 
grubby manually under sudo it runs fine.

regards,
Steve

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