Questions tagged [uefi]

Unified Extensible Firmware Interface (UEFI) is a specification that defines a software interface between an operating system and platform firmware (BIOS)

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PXE boot failing on RHEL install; PXE-E79

i'm trying to install RHEL 9.0 on a gigabyte motherboard, Product Name: H170M-D3H-CF. My dhcp setup has worked in the past, so I don't think the dhcp is the issue. I know that something is going ...
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How should the EFI System partition be made redundant without using hardware RAID?

What is BCP for making the EFI System partition redundant without using hardware RAID? If I create 3x EFI System partitions on different devices and then backup any changes made to the primary (...
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OpenSUSE transactional server boot partition and efi

I have following problem with OpenSUSE transactional server. By mistake it was configured with /boot being ext4 partition on a dedicated drive, which also contains /boot/efi. I have noticed that /boot ...
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How to make grub for fully portable linux on usb thumbdrive without writing entry to systems EFI?

I've installed Debian Bullseye on a usb thumbdrive. When I plug the thumbdrive notebook bootet from it, because there was an entry in UEFI "debian". After removing it with sudo efibootmgr -b ...
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How to partition disks in Debian 10 installer for RAID5 on UEFI machine?

Installing Debian 10. I have 3 disks I want to use as RAID5 on a UEFI machine. I have tried several configurations that either led to failure to install grub or failure to boot (stuck in grub-rescue ...
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How to use EFI Shell to recover from SELinux Lockout?

I enabled SELinux on my Centos 8 box and now I can't get back into the server. It's hosted with a company, so I don't have physical access to it. But I do have access to advanced boot options, ...
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After installing any OS (bios is set to UEFI), the boot order constantly changes (windows and linux installs). How can I disable this "feature"

Have numerous different servers (primarily Dell) that we are installing through pxeboot. After the OS is installed the first time, the UEFI boot sequence is automatically changed to allow the OS to ...
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Why does this EFI-based Linux host keep booting to the second drive?

I have several servers with the same basic setup: primary drive with VFAT /boot/efi, XFS /boot, and XFS / on LVM; and secondary drive with exactly the same thing, each partition rsynced nightly. I ...
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How to run xen hypervisor on a computer that only supports UEFI?

I have tried updating the bios, disabling hyperthreading, adding xen.efi to its proper location within Ubuntu, building xen from source, etc. Yet I cannot get past the following error a Xen panic ...
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How to run Xen with UEFI?

I'm trying to configure Xen so that it runs with UEFI. However instructions I have found online are not clear or outdated. Can anyone provide clear instructions that explain step-by-step of how to ...
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Why does grub's os-prober add entries with `linux` instead of `linuxefi`

On my system, I have two copies of CentOS 7 installed, and one copy of Windows 10 Pro. Every system is bootable and works correctly, and is fully up to date (kernels, packages, the works). When I run ...
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Scuttle Boot Option

I'm trying to devise a simple boot option that would secure erase one or more drives in a computer. Imagine a scenario such as airport security where somebody has the authority to compel you to turn ...
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Issues with Ubuntu not booting on HPE Proliant ML30 Gen9

One of the server machines we use for database backup procedures is having issues and I ran out of ideas. At some point, it froze completely, and so it was forcefully rebooted. After that, the machine ...
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fwupd: What causes this message - "FuPluginPciMei ME family not supported"

I am running Ubuntu 20.04.3 LTS and the default configuration runs fwupd daily. When it does, it appears to run uneventfully but it does generate the following message: fwupd[248903]: 13:56:13:0716 ...
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Ubuntu install with pxe boot (UEFI)

Do I need to create a special configuration to install an ubuntu server with uefi over network pxe boot? I have on my boot server the default pxelinux.0 file. After installation of a new hardware i ...
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Missing UEFI Boot Path Security on Dell Precision 3620

So we are in an academic environment, and to protect our machines, all of them have a BIOS password enabled. We also "thought" this would automatically enable "UEFI Boot Path Security&...
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how to load grub with menu in ipxe setup

I am trying to setup an ipxe environment on a vmware. I would like to configure the setup with UEFI. I have setup a ubuntu-server and configured it as pxe-server. via downloading ipxe, isc-dhcpd, tftp-...
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HPE Proliant Gen10 Stack Fault Exception during PXE boot with UEFI

I am trying to pxe boot a HPE Proliant Gen10 using UEFI BIOS with RHEL (have tried both 7 and 8) and am getting a stack fault exception after the server receives the first boot file (shimx64.efi): HPE ...
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My physical server boot freezes at UEFI: MEM INIT after installing OS

Model: LENOVO ThinkSystem SR250 Was able to boot into Provisioning Manager, set up RAID. After installing Windows Server 2019, it reboots, then stuck at Power On Self Test - UEFI: MEM INIT\ Planned to ...
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Is it possible to update AMI bios from Linux?

I have a motherboard on Supermicro server (model X9SCM(+)/X9SCM). And it is not possible to update it via Supermicro Update Manager - looks like bmc just cannot communicate with bios at all on this ...
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How to use HTTP Boot for VMWare VM UEFI client

I have a VMWare VM (ESXi 6.5, VM version 13) that I want to image over the network. For the past several years we have been using (with much success) a TFTP server containing a PXE image. Now I want ...
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Alpine setup on virtual machine UEFI does not boot

I am trying to setup Alpine linux on a VM (Proxmox) to replicate the layout of physical hardware (raspberry pi). The real layout is a raspberry pi 3, installed as "data" mode (based on wiki) ...
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Booting from CD-ROM image with HP server in UEFI mode

I have a ProLiant BL460c Gen9 server, on which I want to install my OS with UEFI mode. After I changed the boot mode to UEFI and disabled secure-boot and tried to boot my Centos7 Image from CD-ROM ...
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How much physical RAM is "lost" to BIOS/UEFI?

Browsing the linux kernel output dmesg on 6 different systems (4 server, and for the sake of comparison also 2 laptops) I am shocked by the large amount of BIOS/UEFI reserved RAM Three servers systems ...
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PCIe - Training error on device - Link degraded, macLinkWidth = x16, negotiatedLinkWidth = x8

i've placed a pcie raid adapter card with onboard ssd's (AORUS RAID ADAPTOR built in with 4 x PCIe 3.0 512GB NVMe SSD) in a new (2020) Dell (Optiplex 7080). the system boots fine most times, but it ...
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Access POS UEFI (Aptio) from linux

I have a POS machine that uses the Aptio BIOS/UEFI. In there, there is an option called OS SELECTION which is set to linux/win7 as I use linux for that machine. Is there a way to check this remotely ...
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systemd-gpt-auto-generator doesn't mount EFI system partition

according to the documentation, the systemd-gpt-auto-generator should automatically find the EFI system partition and generate a mount unit to mount it on /efi. However this does not appear to work on ...
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INACCESSIBLE BOOT DEVICE on Windows Server 2019 after Windows update installation

Was doing routine updates and one of our Windows Server 2019 hypervisors didn't come back up afterwards. Instead it gives the error "INACCESSIBLE BOOT DEVICE". I've followed various guides ...
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Chain loading grub2 via PXELINUX for UEFI CentOS 8 installation

We support multiple linux distributions and we install them via the UEFI version of pxelinux. Before CentOS 8 you could just directly load the kernel and the initrd via the UEFI version of PXElinux. ...
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Ubuntu 18.04 "Advanced Installation" official guide for RAID 1 installation appears broken for UEFI installation

I had no issues earlier with RAID 1 setup on Ubuntu 16.04. However, on 18.04 it has been a struggle. I finally located this guide. I followed the guideline to the dot. However, I am unable to set the ...
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2 answers
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UEFI boot sequence initially set to PXE first but always reset to local disk first after ESXi installation

I have some Dell PowerEdge R720 servers for testing. To make life easier, the UEFI boot is set to PXE first and in the PXE boot menu it'll default to boot from local disk if there's no input from the ...
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2 votes
2 answers
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How to modify a VM instance setting to boot from BIOS to UEFI?

I shrank my boot hard disk size on my Google Cloud Compute VM. Something which switched the boot method of the OS installed on it from legacy to UEFI along with the disk boot settings (which triggers ...
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Convert MBR linux disk to GPT to run Windows 10

I'm in a situation where I want to reformat my main SSD hard drive (500GB) to run Windows 10. Currently it is running linux (ubuntu). I have a bootable Windows 10 install USB, however when I try to ...
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How to add a certificate in UEFI SHIM for signing a kernel module on GCP?

I followed this tutorial in order to add my own signed kernel module in my Ubuntu VM (18.04 LTS). It is hosted on Google Cloud Platform. I would like to add a certificate in the UEFI shim/Mokmanager, ...
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Fedora Boot UEFI SLOW

After a fresh install of Fedora 31, the boot time is incredibily slow. I suspect something went wrong with the boot partitions. Here is the layout [root@linux Scaricati]# efibootmgr EFI variables ...
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(WDS) UEFI PXE Boot Fails While Downloading NBP File

Hello guys i'm currently running into an issue where the laptop that i'm trying to network boot with would go download the NBP file over the network but then it would go back to the BIOS menu. I was ...
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No boot in Devuan after installation - EFI Shell

I installed Devuan ASCII on a virtual machine on VirtualBox. Installation went smooth, but after installation I get the following EFI shell See the image But any attempt to enter a BLK* device ended ...
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Can a UEFI driver/service reserve a PCI device, preventing the OS from knowing about it and then use it after the OS boots [closed]

Theoretically, if i was to have a extra network card in my computer would it be possible to create a UEFI driver/service which would prevent the about-to-boot operating system from knowing about the ...
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3 votes
1 answer
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How do I mount the OS (system) disk from the UEFI shell?

I have to run a firmware update script that lives on the first hard drive of an Intel server board. I must use the UEFI shell to run this script, according to the Intel docs. (Our servers have no ...
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Create iPXE UEFI bootable image for QEMU/Libvirt with custom next-server and filename

I can create a VM with libvirt/qemu to boot in UEFI mode. I know that it does iPXE by default, but I want to create/modify a iPXE image in order to override filename and next-server properties. How ...
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Exception during the UEFI preboot environment. DellFormsProcessorDxe.efi

While booting a Dell PowerEdge r720, UEFI crashes, making it mostly unbootable. This exception occurs after pressing F2 to get to "F2 System Setup" which means getting to the menu to switch back to ...
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booting HP ProLiant DL160 Gen8 in uefi

I recently got a DL 160 gen8 and I'm trying to boot windows from a 3TB drive. the windows Installer is refusing to install windows on gpt partitions. So I need to boot in uefi. I looked everywhere ...
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Difficulty booting HPE server via PXE in UEFI mode

We have some HPE ProLiant blade servers, Gen9, which we would like to network boot to install CentOS. We are using Cobbler to produce a configuration. At boot time, the server will request a file ...
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Chainloading syslinux using grub2

I created a syslinux/isolinux hybrid CD iso to boot either legacy bios or eufi depending on what is needed. The legacy bios part works well and has worked for many years. I am using the newest (6.0.3) ...
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How can I generate/or edit a grub.cfg on each EFI partition that refers to the ubuntu installation on the same physical disk?

I have an install of Ubuntu 16.04 server set up on two disks with software raid across two large partitions. The start of each disk contains an EFI partition. I would like to be able to boot from ...
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1 answer
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Are my EFI partitions mutually bootable? How to interpret the output of efibootmgr -v

I have two GPT formatted disks both starting with EFI partitions and followed by a single physical raid partition. I installed ubuntu-server 16.04 with software raid over these two raid partitions and ...
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21 votes
2 answers
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How do I convert my linux disk from MBR to GPT with UEFI?

I have a linux box (Ubuntu 16.04) whose boot disk is partitioned using MBR. How can I convert it to GPT+UEFI?
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What's the equivalence of pxelinux.0 and pxelinux.cfg/default configration for UEFI?

I use Pxe to servers with BIOS(legacy mode), which works perfectly. Set Legacy mode and boot servers from PXE, it would load pxelinux.0 and read config menus via TFTP from /var/lib/tftpboot/pxelinux....
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Chainloading to WDS from iPXE with UEFI

I am in the process of configuring our WDS server to support booting multiple OS's over the network. We have this setup and working using PXELinux for BIOS systems but need to support UEFI systems ...
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BHyVe: Is there any way to boot to UEFI shell?

I'm starting BHyVe virtual machine with UEFI firmware from ports using chyves and I have a problem with a boot loader misconfiguration on this particular VM. I don't want to boot to OS in order to ...
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