[CentOS] Re-enable grub boot in UEFI (Windows took over it)

Thu Feb 1 17:13:00 UTC 2018
wwp <subscript at free.fr>

Hello Chris,


On Thu, 01 Feb 2018 17:00:03 +0000 Chris Murphy <lists at colorremedies.com> wrote:

> You can to use efibootmgr for this. NVRAM boot entry is what changed, not
> the contents of the EFI System partition.
> 
> efibootmgr -v
> 
> Will list all entries and Boot Order. You need to use --bootorder to make
> sure the CentOS entry is first.

Interesting.. thanks for your reply!

Too bad I never run this command when things were OK (in order to
compare), 'cause now, what it says doesn't mention anything that seem
related to the CentOS partition or I read wrong:

BootCurrent: 0007
Timeout: 0 seconds
BootOrder: 0001,0002,0003,0004,0005,0006,0007
Boot0000* Windows Boot Manager  HD(1,GPT,a6b87338-9b9c-4a50-8fde-2447e8fdebb6,0x800,0xfa000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}....................
Boot0001* UEFI: A400 NVMe SanDisk 512GB, Partition 1    HD(1,GPT,a6b87338-9b9c-4a50-8fde-2447e8fdebb6,0x800,0xfa000)/File(EFI\Microsoft\Boot\bootmgfw.efi)..BO
Boot0002* Diskette Drive        BBS(Floppy,Diskette Drive,0x0)..BO
Boot0003* M.2 PCIe SSD  BBS(HD,P0: A400 NVMe SanDisk 512GB,0x0)..BO
Boot0004* USB Storage Device    BBS(USB,KingstonDataTraveler 3.0PMAP,0x0)..BO
Boot0005* CD/DVD/CD-RW Drive    BBS(CDROM,CD/DVD/CD-RW Drive,0x0)..BO
Boot0006* Onboard NIC   BBS(Network,Onboard NIC,0x0)..BO
Boot0007* UEFI: KingstonDataTraveler 3.0PMAP, Partition 1       PciRoot(0x0)/Pci(0x14,0x0)/USB(16,0)/HD(1,MBR,0x61f11812,0x800,0x737f800)..BO

I don't know what 0001 and 0002 refer to exactly (there's only one SSD
drive in this laptop).


Regards,

-- 
wwp
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