[CentOS] HP Envy EFI problem after BIOS update

Wed Sep 14 18:03:48 UTC 2016
Chris Murphy <lists at colorremedies.com>

On Wed, Sep 14, 2016 at 9:06 AM, Gary Stainburn <gary at ringways.co.uk> wrote:
> I don't know if this additional information helps. Looking at he efibootmgr
> output, is the centos entry pointing to the right place?
> Also, any idea why the update isn't being make permenant?

Probably because the specified file wasn't found by the firmware on
partition 1, so it removed what it thinks is a bogus entry. Just a

> Number  Start   End     Size    File system  Name                  Flags
>  1      1049kB  683MB   682MB   ntfs         Basic data partition  hidden,
> diag
>  2      683MB   892MB   210MB   fat16        EFI System Partition  boot

The proper command in this case is

efibootmgr -c -d /dev/sda -p 2 -L CentOS -l \\EFI\\centos\\shim.efi

efibootmgr -v is more rewarding

> Boot0001* Fedora
> HD(2,145800,64000,14c4ac1d-abd8-4121-84ee-c05a825920de)File(\EFI\fedora\shim.efi)RC

Looks fine. But notice the boot order:
BootOrder: 0003,2002,0002,3002,0001,2001,2003

That puts Fedora in 5th place. You need to use efibootmgr -n 0001 to
do a one time boot of Fedora at next boot; or you need to use
efibootmgr -o and explicitly change the entire boot order, separated
by commas.

I have no idea what RC at the end of these lines means though.

Chris Murphy