search for: grubx64

Displaying 20 results from an estimated 55 matches for "grubx64".

2018 Jan 09
2
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...
2018 Jan 12
1
update to Centos7.4: Failed to open \EFI\BOOT\grubx64.efi - Not Found
----- Oorspronkelijk bericht ----- Van: "Adrian Jenzer" <a.jenzer at herzogdemeuron.com> Aan: "CentOS mailing list" <centos at 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 at centos.org] On Behalf Of johan.vermeulen7 at 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,...
2016 Aug 22
2
GRUB 2 dumps to grub prompt when installed on >4TB disk
...r on BIOS Boot if GPT disk (formerly | > | stage 1.5 and stage 2). The core.img is where grub rescue comes from | > | when it can't find grub modules, in particular normal.mod. | > | | > | But on UEFI, core.img, normal.mod, and a pile of other modules are all | > | baked into the grubx64.efi file founds on the EFI system partition. | > | | > | I suspect two things that can cause normal.mod to not be found: | > | a. The system is not in fact booting in UEFI mode and there's been | > | some mistake in the installation of grub. | > | b. The system is in UEFI mode, b...
2018 Jan 09
0
update to Centos7.4: Failed to open \EFI\BOOT\grubx64.efi - Not Found
-----Original Message----- From: CentOS [mailto:centos-bounces at centos.org] On Behalf Of johan.vermeulen7 at 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...
2016 Aug 23
0
GRUB 2 dumps to grub prompt when installed on >4TB disk
...the grub2-efi-modules package allows for grub2-install to work. No, this logic is flawed. Running grub2-install is obsolete on UEFI, it only applies for users who know exactly what they're getting themselves into and have a use case for modules in grub2-efi-modules that are not already in the grubx64.efi binary that's included in the grub2-efi package. If you run grub2-install, it blows away that grubx64.efi from the grub2-efi package in favor of a custom built one, which has completely different and for the most part undocumented behavior. For example the grubx64.efi bootloader in grub2-e...
2012 Jul 02
4
Xen EFI boot how to?
I have a IBM System x3600 series server with UEFI. I managed to compile the xen EFI (xen-4.2-unstable.efi). The machine is currently running Ubuntu with grub2. I can see a grubx64.efi in /boot/efi/EFI/ubuntu/grubx64.efi Where should I put the xen efi ? I tried creating a efi/EFI/xen/xen-4.2-unstable.efi and added it as a boot option using efibootmgr. All I get in that case is a blank screen. I had to go into the UEFI bios menu to delete that o...
2016 Aug 19
2
GRUB 2 dumps to grub prompt when installed on >4TB disk
...1) | and core.img in the MBR gap or on BIOS Boot if GPT disk (formerly | stage 1.5 and stage 2). The core.img is where grub rescue comes from | when it can't find grub modules, in particular normal.mod. | | But on UEFI, core.img, normal.mod, and a pile of other modules are all | baked into the grubx64.efi file founds on the EFI system partition. | | I suspect two things that can cause normal.mod to not be found: | a. The system is not in fact booting in UEFI mode and there's been | some mistake in the installation of grub. | b. The system is in UEFI mode, but either the installer, or | post...
2018 Feb 05
1
Re-enable grub boot in UEFI (Windows took over it)
On Mon, Feb 5, 2018 at 8:27 AM, Kay Diederichs <kay.diederichs at uni-konstanz.de> wrote: > grub-install /dev/nvme0n1 Running this on computers with UEFI firmware is not good advice, it's an obsolete command. People should use the prebaked grubx64.efi binary that comes in the grub2-efi package, and is a signed binary so it can support UEFI Secure Boot. If you run grub2-install, a new unsigned grub binary is created, replacing grubx64.efi. If you have Secure Boot enabled, you will not be able to boot, until you either reinstall the grub2-efi...
2016 Aug 21
0
GRUB 2 dumps to grub prompt when installed on >4TB disk
...MBR gap or on BIOS Boot if GPT disk (formerly > | stage 1.5 and stage 2). The core.img is where grub rescue comes from > | when it can't find grub modules, in particular normal.mod. > | > | But on UEFI, core.img, normal.mod, and a pile of other modules are all > | baked into the grubx64.efi file founds on the EFI system partition. > | > | I suspect two things that can cause normal.mod to not be found: > | a. The system is not in fact booting in UEFI mode and there's been > | some mistake in the installation of grub. > | b. The system is in UEFI mode, but either...
2017 Dec 15
2
EFI PXE Server - pxelinux.0 equivalent?
...I'm not sure if it's appropriate to ask this here, but I don't see this question explicitly answered anywhere. Is there an EFI version of "pxelinux.0" that will function basically the same way and read the same pxelinux.cfg/default menu files? I've got a really dodgy grubx64.efi EFI PXE menu up at work, but it can't load the 1.2 gigabyte LiveCD that we use on all of our systems. Basically I just want to pick up my legacy PXE menu configurations and use them on a system that boots only through EFI PXE. Is that possible?
2020 Jul 31
0
8.2.2004 Latest yum update renders machine unbootable
...e use of efibootmgr was investigated and a corrupt looking entry removed. A new entry was also created. efibootmgr -v To list entries efiboot mgr -b 2 -B 2 To remove entry 2 say efibootmgr -t 10 To increase time to edit efibootmgr -c -d /dev/sda -p1 -L ja_C7 -l '\EFI\centos\grubx64.efi' -c create new entry -d Device -p vfat partition number -L Label -l boot loader The choice for the "boot loader" option would seem to be shimx64.efi shimx64-centos.efi shim.efi grubx64.efi Which version is correct is unknown, but '\EFI\centos\g...
2016 Aug 18
2
GRUB 2 dumps to grub prompt when installed on >4TB disk
Hi All, I have a Dell R710 that has 6x1TB in a RAID-5 configuration. When installing CentOS 7 using the full disk capacity and booting in UEFI mode the machine dumps me into a GRUB rescue mode prompt. error: disk `,gpt2' not found Entering rescue mode... grub rescue> If I use the PERC RAID controller to make the disk smaller ROOTDISK volume of 100GB in size and then a DATA volume
2018 Aug 02
4
Unable to get syslinux.efi to work, grub2 boots tho
...to boot UEFI from USB. I've created fat32 formated partition with ef00 type. I placed EFI/BOOT there with content of efi64/ distribution, I've created syslinux.cfg and renamed syslinux.efi to BOOTX64.EFI. However, it does just hangs. I then replaced BOOTX64.EFI with the copy of grubx64.efi and I got a working GRUB2 shell, so I suppose the problem is within syslinux. I tried sys-boot/syslinux-6.03 and sys-boot/syslinux-6.04_pre1 with no luck. any hints how to get syslinux on UEFI working? -- Piotr.
2020 Jul 31
3
8.2.2004 Latest yum update renders machine unbootable
I am running an Intel x64 machine using UEFI to boot an SSD. Installing the latest yum update which includes grub2 and kernel 4.18.0-193.14.2.el8_2.x86_64 renders the machine unbootable, blank screen where grub should be, no error messages, just hangs. After some hours I managed to modify another bootable partition (containing older software) and boot it from there. After that, I? found out
2018 Nov 20
7
kernel 3.10.0-957.el7.x86_64 + EFI on Dell server - problem
hi guys I've one box where I just yesterday upgraded Centos. I wonder if that kernel upgrade process might somewhat troublesome. After that upgrade UEFI boot fails with: Failed to set MokListRT: Invalid Parameter Something has gone seriously wrong: import_mok_state() failed : Invalid Parameter Has anybody seen that? And maybe know to fix it? many thanks, L.
2018 Feb 01
5
Re-enable grub boot in UEFI (Windows took over it)
...iveGnome, I could use its grub command prompt to inspect the UEFI of the local SSD drive, see that the centos/ sub-directory and files are still there. /boot/efi/EFI/centos/: BOOT.CSV BOOTX64.CSV fonts grub.cfg grub.cfg.1501243846.rpmsave grub.cfg.1505469290.rpmsave grubenv grubx64.efi mmx64.efi shim.efi shimx64-centos.efi shimx64.efi maybe /boot/efi/EFI/Boot/ contents has been altered? /boot/efi/EFI/Boot/: bootx64.efi fbx64.efi I had a backup of the full efi partition (`dd`) but it's outdated and I feel it's a bad idea to re...
2015 Sep 16
2
Secure boot
After updates to grub2 and kernel in CentOS 7, today, systems will no longer boot in Secure Boot mode. I'm not positive, but I think grub2 is the culprit. Is anyone else seeing the same problem?
2015 Sep 17
1
Secure boot
...e followed properly. Yeah, I just figured out how to query the signature of the new and previous grub image. The new one is signed with "Red Hat Test Certificate" [root at vagrant ~]# pesign --show-signature --in /var/tmp/grub2-16/boot/efi/EFI/centos/grubx64.efi --------------------------------------------- certificate address is 0x7fb81b3cb808 Content was not encrypted. Content is detached; signature cannot be verified. The signer's common name is Red Hat Inc. No signer email address. Signing time: Thu Mar 26, 2015 There were certs or crls include...
2016 Aug 18
0
GRUB 2 dumps to grub prompt when installed on >4TB disk
...merly stage 1) and core.img in the MBR gap or on BIOS Boot if GPT disk (formerly stage 1.5 and stage 2). The core.img is where grub rescue comes from when it can't find grub modules, in particular normal.mod. But on UEFI, core.img, normal.mod, and a pile of other modules are all baked into the grubx64.efi file founds on the EFI system partition. I suspect two things that can cause normal.mod to not be found: a. The system is not in fact booting in UEFI mode and there's been some mistake in the installation of grub. b. The system is in UEFI mode, but either the installer, or post-install, gr...
2020 Aug 02
4
8.2.2004 Quick recovery and fix for unbootable machines
...X1) 1800+0 records in 1800+0 records out 7372800 bytes (7.4 MB, 7.0 MiB) copied, 0.980893 s, 7.5 MB/s 2) Turn off secureboot in your UEFI hardware. 3) Boot the USB key. You should get a colourful screen with icons and a filename below. Use the left/right arrow keys to select the correct grubx64.efi. Hit space to boot. Your usual grub menu should appear and the system should boot normally. HOW TO FIX THE PROBLEM ===================== 1) We need to downgrade the shim package. Now your system is running get an older copy of the correct shim package for your architecture from the CentOS i...