F20: yum update does not automatically update grub2

Michael Schwendt mschwendt at gmail.com
Sun Dec 22 21:47:05 UTC 2013

On Sun, 22 Dec 2013 15:26:32 -0600, Ranjan Maitra wrote:

> I removed the new kernel, updated grub2-mkconfig and rebooted into the
> old kernel. Does this not bring it back to the old setup (before
> installation of the new kernel). Or if your question was if the problem
> is reproducible in the sense that grub does not automatically update
> after a yum update (or downdate) of the kernel, then the answer is yes.

Great! Then you can try running the kernel package's %posttrans scriptlet
commands manually and try to determine which part fails. Here it calls
the kernel-install shell script:

  # rpm -q --scripts kernel|tail -2
  posttrans scriptlet (using /bin/sh):
  /bin/kernel-install add 3.12.5-302.fc20.x86_64 /boot/vmlinuz-3.12.5-302.fc20.x86_64 || exit $?

> In /etc/grub2.cfg as in:
> linux   /vmlinuz-3.11.10-301.fc20.x86_64 resume=/dev/sda2
> root=/dev/sda3 ro vconsole.font=latarcyrheb-sun16  nomodeset rhgb quiet
> Is this not the right place to have done it?

/etc/sysconfig/grub is the file to edit, since grub.cfg may be overwritten
(e.g. when running grub2-mkconfig), and if you are not careful when
editing the symlink, it will be replaced with a file and disconnected from
its target.

# file /etc/grub2.cfg 
/etc/grub2.cfg: symbolic link to `../boot/grub2/grub.cfg'

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