On 01/12/2018 08:24 PM, johan.vermeulen7@telenet.be wrote:

----- Oorspronkelijk bericht ----- Van: "Adrian Jenzer" a.jenzer@herzogdemeuron.com Aan: "CentOS mailing list" centos@centos.org Verzonden: Dinsdag 9 januari 2018 16:56:57 Onderwerp: Re: [CentOS] update to Centos7.4: Failed to open \EFI\BOOT\grubx64.efi - Not Found

-----Original Message----- From: CentOS [mailto:centos-bounces@centos.org] On Behalf Of johan.vermeulen7@telenet.be Sent: Dienstag, 9. Januar 2018 16:34 To: CentOS mailing list Subject: [CentOS] update to Centos7.4: Failed to open \EFI\BOOT\grubx64.efi - Not Found

Hello All,

updating from Centos7.3 to Centos7.4 rendered one of our laptops unbootable. EM: Failed to open \EFI\BOOT\grubx64.efi - Not Found Failed to load image \EFI\BOOT\grubx64.efi: Not Found start_image() returned Not Found

How could this occur because of an update and how to fix this?

What I tried is booting from centos usb, chroot to /mnt/sysimage and gave command: efibootmgr --create --label CentOS --disk /dev/sda1 --loader "\EFI\centos\shim.efi"

This gave no EM, but booting remains impossible.

I have to say I don't know whether to try grub2 of efibootmgr commands.

Any help would be very much appreciated.

Greetings, J. _______________________________________________ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos

Hi Johan

I remember I had a similar issue and I resolved it by copying grubx64.efi from /centos : cp /boot/efi/EFI/centos/grubx64.efi /boot/efi/EFI/BOOT

regards Adrian

Adrian,

thanks for helping me out. That didn't fix the system. The EM has changed though, it now simply says " no bootable device".

Greetings, J.

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CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos _______________________________________________ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos

Hi Johan appart from the above copy of the boot file, would you probably need something like this:

efibootmgr -b xxxx -l EFI/BOOT/grubx64.efi

i.e. tell BOOTxxxx to use the intended boot file.

xxxx may be found out via

efibootmgr -v BootCurrent: 0000 Timeout: 0 seconds No BootOrder is set; firmware will attempt recovery Boot0000* Notebook Hard Drive BBS(HD,,0x0)....................................................................... Boot0001* Notebook Ethernet BBS(128,,0x0)........................E.............................................. Boot0002* Centos HD(1,GPT,068e45cc-b2b6-4688-9974-ad7d27e419f8,0x800,0x7a000)/File(EFIcentosgrubx64.efi)

xxxx by default is 0000

suomi