On Tue, 2014-04-08 at 10:54 +0200, Chris Murphy wrote:
On Apr 8, 2014, at 9:19 AM, Fred New <fred.new2911(a)gmail.com>
wrote:
>
>
>
> On Tue, Apr 8, 2014 at 7:30 AM, Adam Williamson <awilliam(a)redhat.com> wrote:
>
>> In what way? I wrote it, just a month or two ago. I'm not aware of
>> anything in it which is outdated.
>>
> Sorry, my mistake. I thought this one also referred to Fedora 18.
It does. And for UEFI it's the same since Fedora 18.
a. Anything after grub2-install is ignored because the target must be
mounted, typically that's at /boot/efi.
b. If you actually use grub2-install and overwrite the existing
grubx64.efi on the EFI System partition, it breaks UEFI Secure Boot
computers ability to boot Fedora because the resulting bootloader will
not be signed.
c. Even if you don't use Secure Boot, the custom created grubx64.efi
(core.img) is sufficiently different in behavior from the prebaked
grubx64.efi that you may want to pull your hair out anyway.
So everyone just needs to stop recommending reinstalling grub this
way.
I don't think anyone has actually explicitly recommended doing so for
UEFI; I just think the people who've mentioned it haven't understood
UEFI at all and are just parroting the 'standard' advice for
'reinstalling grub'.
Thanks for the mail, though, because I didn't actually know what
grub2-install *does* on UEFI, only that it's not necessary. :P
--
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | XMPP: adamw AT happyassassin . net
http://www.happyassassin.net