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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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18 views

Debian 10 boots from wrong partition/disk

Every once in a while my Debian machine tries to boot from the wrong disk(partition). When I look in my BIOS, I see three bootdevices : Samsung HM320JI (debian) Samsung HM320JI UEFI I cannot explain ...
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1answer
75 views

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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112 views

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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411 views

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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1answer
222 views

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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183 views

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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18 views

Can't boot DL360 with disk of other DL360 (raid1 with SmartArray)

I would need some help on a topic I don't really masterize :) I have a Proliant DL360 G9 (server1) 2 disks in Raid1 (disk1 & disk2), using HP SmartArray My server went KO, and I used another ...
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82 views

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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0answers
90 views

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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1answer
310 views

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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1answer
62 views

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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101 views

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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2k views

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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67 views

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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58 views

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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2answers
424 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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2answers
814 views

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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1answer
967 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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1answer
237 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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208 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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2answers
6k 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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0answers
141 views

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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1answer
59 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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1answer
2k 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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1answer
1k 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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1answer
2k 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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1answer
4k views

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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1answer
417 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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0answers
907 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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1answer
255 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
136 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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2answers
42k 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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2answers
3k views

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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1answer
3k 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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0answers
458 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
317 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
2k 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
2k 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
1k 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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2answers
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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1answer
54 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
5k 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
3k 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
2k 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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0answers
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
1k 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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0answers
2k 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
916 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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0answers
406 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 ...