On 09/14/2016 07:40 AM, Gary Stainburn wrote:
I had to boot my HP Envy into Win8 for the first time in ages this morning. When I did that, it installed some updates including a BIOS update.
Once this was all done, once again the GRUB boot menu was gone and it booted straight into Win8. Using the advanced boot manager options in Win8 I managed to get the EFI boot menu up and chose Ferdora 21.
It was only after Fedora failed to boot that I realised that this was wrong. Some time ago I had replaced F21 with Centos 7 and the three Centos 7 options were the ones that should be available - plus the Windows 8 boot manager.
I have managed to boot into a Centos 7 Live KDE image. In this ran efibootmgr which shows the same thing. I can fix the boot sequence, but that will not get me back the Centos entries.
Can anyone suggest how I can do that?
In some BIOS/firmwares you'll have the option to 'add' an entry, and you can just point a new one to EFI/centos/shim.efi, save and be done with it.
Otherwise you can do something like:
efibootmgr -c -d /dev/sda -p 1 -L "CentOS" -l '\EFI\centos\shim.efi'
there are a couple efi files inside /boot/efi/EFI/centos, but shim is the one to point to for secureboot to work properly.
Gary
[root@localhost ~]# efibootmgr BootCurrent: 0000 Timeout: 0 seconds BootOrder: 2002,0002,3002,0001,2001,2003 Boot0000* Internal CD/DVD ROM Drive (UEFI) Boot0001* Fedora Boot0002* Windows Boot Manager Boot2001* USB Drive (UEFI) Boot2002* Internal CD/DVD ROM Drive (UEFI) Boot3000* Internal Hard Disk or Solid State Disk Boot3002* Internal Hard Disk or Solid State Disk [root@localhost ~]# _______________________________________________ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos