On Dec 24, 2013, at 9:28 AM, Ranjan Maitra <[email protected]> 
wrote:

>> 
>> 
>> grub2-install --debug /dev/sda


Looks good.

> 
>> bash -x grub2-mkconfig -o /boot/grub2/grub.cfg

FYI:
Line 79, I do not see resume= having been added to /etc/default/grub, therefore 
it won't be in the grub.cfg.

Line 127/128, it found kernel 3.12.5-302 and its initramfs.
Line 129 only kernel 3.11.10-301 is found, this probably isn't a bootable 
kernel option.
Line 130/131 is the rescue kernel and initramfs, it should work and chances are 
it's 3.11.10-301.


> 
>> /boot/grub2/grub.cfg  #from the above command

This looks better than the original one, the root=UUID=<uuid> is present 
instead of referring to root with /dev/sd3. As expected, contains working 3.12 
and rescue kernel boot options. The 3.11.10 option probably ends in a kernel 
panic, because line 91 lacks an initrd command for this kernel entry.

I suggest you do not yum erase the 3.11.10 kernel, because that will remove all 
of its modules, which the rescue kernel depends on. To remove this from the 
grub menu, just rm -f the vmlinuz-3.11.10 kernel from the /boot directory. If 
you want you can also remove its config file. Then you can rerun: 
grub2-mkconfig -o /boot/grub2/grub.cfg and it will no longer have the 3.11.10 
option, just the working 3.12.5 and rescue options.

When the next kernel update comes out, it ought to update this grub.cfg now. If 
not report back and we'll try to figure out what's going on.


Chris Murphy
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