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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IBM x3100 M4 failed to update UEFI

I just got this server with UEFI v1.07. Tried to upgrade RAM, can't boot Maybe that RAM module not supported, anyway just try to update firmware Updating stuck at Collecting service data. Waited for 5 ...
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restore zsys history in grub for ubuntu 20.04 (or revert to a previous state in command line)

I have installed Ubuntu 20.04 with ZFS on my Dell XPS-L702X. Is it possible with zsys to revert the machine to a previous state (I mean a complete state, of course, like the ones you can find on the ...
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69 views

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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How to modify a vᴍ instance setting to boot from BIOS to UEFI?

I shrank my boot hard disk size on my Google Cloud Compute ᴠᴍ. Something which switched the boot method of the ᴏꜱ installed on it from legacy to uefi along with the disk boot’s settings (which ...
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132 views

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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140 views

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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89 views

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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952 views

(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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56 views

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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468 views

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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Ubuntu Uefi + lvm freezing after using gpu intensive

Ive done a fresh ubuntu 18.04 installation on a crutial ssd m.2 1TB I Thought it would be nice to use the lvm feature. But after using some time the system freezing without any option to recover. The ...
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(U)EFI add custom help message

I am trying to customize my EFI boot menu for CentOS 7 . I need to put a separate additional help menu , which displays all "help messages". Is it possible with (U)EFI ?
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593 views

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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Boot UEFI machine through iPXE on Nova

As per Does nova support pxe boot? I need to boot a VM in an Openstack project through PXE. As of today, the proposed solution (also as on this procedure) in the previous link works for BIOS, but I ...
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25 views

Updating microcode with combined kenel/initramfs

I'm running a system that boots to a .efi image that contains the kernel and the initramfs (unified kernel image). It is based on centos 7, 64 bit, with an Intel processor. I know that with a separate ...
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1answer
605 views

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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267 views

Booting WinPE (Windows 10) over PXE with UEFI Secure Boot Support

I am sure this has been covered over and over, My question is fairly simple I have a dd-wrt router and a raspberry pi, the pi is hosting my DNS, DHCP, and tftp among other tasks, I have my router ...
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Changing Apple EFI for Xeon microcode

I have Mac Pro 3,1. I have just bought 2x Xeon E5450 SLBBM E0 stepping and found that there are unsupported by my Mac Pro. I tried to google for this problem and found that only SLANQ C0 stepping ...
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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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280 views

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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557 views

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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160 views

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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1answer
123 views

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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15k views

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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2k views

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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298 views

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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1answer
260 views

Fedora - Configuring as a Xen Host (EFI preferable)

I've got a new Fedora box that I'm setting up as a Xen host (Dom0), which is proving a little more difficult than expected. First stop - install Xen via DNF and reboot. Find that the Xen boot option ...
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1answer
988 views

HyperV Linux EFI VHDX migration is missing EFI in the boot options

I have a HyperV 2016 cluster of n machine running on W2k16. I've duplicated the VHDX of a RHEL 7.5 (Gen2) VM that runs with this boot order (and secure boot disabled): After creating a new VM with ...
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1answer
1k views

Failing to PXE Boot UEFI Server

I've been having a lot of issues with UEFI boots lately. I have two VMs that I've been using for testing. One is running DHCP/TFTP (CentOS 7) and the other is a client set to UEFI boot. I have ...
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2answers
891 views

Sequence of Windows OS files read at the time of installation

I am installing Windows 10 OS through Ubuntu based Clonezilla Server in PXE UEFI mode. I need to add the windows os provision into the server using grub.cfg for clients deployment. I added the windows ...
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1k views

Boot Linux in UEFI on a LSI card using GRUB2

Before this question is marked as a duplicate of 'Just installed LSI 9211; no drives showing up to Linux' or anything similar: No. My problem was with the UEFI firmware being unable to boot from the ...
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44 views

PowerEdge T20 boots to linux without POST

I have a PowerEdge T20 with Arch Linux installed. I rebooted to try to boot from a USB disk, but the system enters Gnome desktop without showing any POST screen. I have an old 17" monitor that I'm ...
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1answer
4k views

How to boot a UEFI based Windows OS via a Linux PXE server

I would like to install a Windows OS on an UEFI machine via a linux PXE server. I can install Windows OS on a legacy machine by directing it to boot to memdisk and winpe iso image. I understand the ...
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1answer
1k views

GCP: Invalid resource usage: 'UEFI feature is not available for this project.'

I created an image using the --guest-os-features="UEFI_COMPATIBLE" option as described in the documentation but when trying to instantiate an VM Instance (using the Console and gcloud) I get the ...
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1answer
1k views

dnsmasq proxyDHCP PXE and EFI “start_image() returned Invalid Parameter”

I'm tying to install a PXE install server with dnsmasq in proyxDHCP mode. So far legacy BIOS install is working. When I try to use EFI it fails. With dhcpd the EFI boot is working. Therefore the ...
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1k views

Debian - software RAID 1 in UEFI mode

I am a beginner in UEFI, so excuse me if this question is vey simple. I have two 3 TB disks and want to install Debian 9.4 with RAID1 in UEFI mode.After reading all the information I am thinking about ...
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2answers
861 views

Asus P10S-C/4L won't get past Q Code 62 with Intel E3-1220 v6 and 8GB of DDR4 2400 ecc

Upon power up, the Asus logo appears on screen and the Q Codes change as it moves through the boot procedure until 62 is reached where it gets stuck and stays until I reset or power off. I have sent ...
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1answer
2k views

How to convert MBR to GPT and change from BIOS/legacy boot to UEFI

I am trying to convert a Windows 10 Enterprise VM from BIOS boot to EFI/UEFI. After extensive research I found the built-in "MBR2GPT" tool that MS released with Fall Creators Update: https://docs....
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1k views

IP helper addresses for regular DHCP plus PXE booting

We use WDS to install new workstations, and the newest batch we've gotten are set to use UEFI, so I'm trying to adjust my setup accordingly. Previously, we had the 66 and 67 options set on our DHCP ...
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1answer
744 views

trying to netboot Linux using PXELinux 6.03 in a EUFI 64 board, tftp too slow

I am trying to set up a kids-school lab, using x5-Z8350 based mini PCs: https://ark.intel.com/products/93361/Intel-Atom-x5-Z8350-Processor-2M-Cache-up-to-1_92-GHz Mine seems to have an AMI 64 ...
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383 views

Install oVirt Node 4.1.6 on IBM x3650 M3

I have here a IBM x3650 M3 Server, with ServerRaid m5015 controller and two disk as raid1 configured. Bios firmware is the newest Version, settings a default except VT-D is enabled and I add legacy ...
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503 views

Fedora 26 UEFI/EFI Rescue Boot

I need to rescue an unbootable UEFI Fedora 26 system. I have booted from the DVD, and used the rescue choot environment. I have a GPT disk with a small FAT32 ESP partition of type EF00. I've run: ...
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1answer
181 views

Troubleshoot libvirt-managed qemu x86-64 UEFI guest

I have a libvirt/qemu/x64 UEFI guest running Windows 10. The problem is that it starts successfully every other time. When I issue a guest start commmand (any libvirt method) 1st time, the guest ...
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1k views

WDS + GRUB2 UEFI: most menu items not working

We are using WDS to deploy operating systems to several types of machines. As per this small guide, I got the UEFI clients to boot grub, but most of the menu items aren't working. When highlighting a ...
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659 views

create bootable ISO from USB flash drive recovery media with imgburn or other tool

I need clean my HDD and partitions but first did a recovery usb drive with the recovery tool, the recovery is one of Thinkpad E431 and was done right. I cant rely only on a fragile usb drive to keep ...
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1answer
4k views

PXE booting EFI Livecd - CentOS

I've got a legacy PXE server that does everything we need at my company, and entries that boot to a (custom) CentOS 7 livecd, again, in legacy PXE. I'd like to get these things working under EFI PXE. ...
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355 views

Prepare Dell PowerEdge R430 for Software Raid Linux

I am wondering which settings are recommended for a R430 to run in Software Raid mode. The server is equipped with 4 disks which should run in Raid 1 for the boot/system and Raid 10 for data. However ...
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3k views

UEFI PXE booting across subnets

I'm trying to boot PCs from a Windows 2012R2 WDS server in UEFI mode. If, and only if, the client is in a different subnet from the DHCP/PXE servers, this fails with some of them. (It always works in ...