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Questions tagged [uefi]

The Unified Extensible Firmware Interface BIOS (UEFI) is a specification that defines a software interface between an operating system and platform firmware. UEFI replaces the Basic Input/Output System (BIOS) firmware interface originally present in all IBM PC-compatible personal computers

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acer uefi does not show windows hdd

Acer TC-280-UR11 was running Windows 10 OK, just slowly. I had partitioned the 2TB drive into 2 parts so my "D" drive had my data. I tried to migrate to an SSD using Acronis for Crucial. After the ...
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my drive is not accessible when switch between two installed win10

i have 3 hard drive on my laptop. 128g ssd (MBR) for my old win10 500g ssd (gpt) for my win10 2tb hdd (gpt) for hackintosh and store my file i hibernated my win10 on the 500g ssd drive and switch ...
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28 views

Windows boot manager with UEFI not loading

I had windows 10 preinstalled on my system with boot type UEFI mentioned in my lenovo ideal pad boot options. I dual booted with linux mint tara which worked fine with grub loader showing both the OS ...
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Partition table to make bootable USB drive

I use fdisk to set the partition table and to create partitions and unetbootin to install the OS on a USB drive. Can anyone explain why the only partition table which makes USB boot option that ...
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1answer
46 views

How to script in Windows Subsystem for Linux (WSL) and call it from a batch file?

Over on https://askubuntu.com/a/1108609/912537 I suggested a method to edit grub from windows. I have grub installed on /boot/efi/EFI/grub and have been trying to create a script which changes the "...
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Lubuntu next to Windows (dual boot) with EFI?

I am trying to install Linux next to my existing Windows. Previously I had Debian but decided it's time to change (new year, etc). So I decided to go with Lubuntu and switched booting from legacy to ...
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UEFI HTTP Network Boot

What is the correct syntax or structure when having to manually create an UEFI HTTP Boot entry ? i.e. bcfg boot add 5 PciRoot(0x0)/Pci(0x13,0x2)/Pci(0x0,0x0)/MAC(123456789AB,0x0)/IPv6(::/128,0,...
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windows upgrade : Error creating the Setup Platform key. Error: 0x80070005

Update 1709 to 1803. Download success, preparations success, installation failure at ~73% Setupdiag Error: SetupDiag reports down-level failure found. Failure Data: Last Setup Phase = Downlevel ...
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2answers
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No motherboard splash screen, and cannot boot into UEFI

I have a PC with the following specs: Asus ROG Strix B350-F Gaming Motherboard Ryzen 5 2600 8GB DDR4 RAM Zotac GTX 1060 6GB AMP! Edition The problem is that I very rarely get the motherboard ...
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36 views

How to create a file of the exact size of a directory (and its files), to hold a FAT32 filesystem?

I'm trying to create a file with the minimum-enough size to contain a FAT32 filesystem, which, in turn, mirrors the contents of a directory (an ESP structure). This is needed to create an UEFI-...
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Black Screen after Grub on multiple Distros

My Problem A laptop I was given (An Acer Travelmate B117) only shows a dimly lit black screen after grub. Live distros boot fine. Afaik the machine does not have a dedicated graphics card. What I've ...
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22 views

Boot Order is changing automatically

My laptop is a Lenovo Yoga 720 15IKB that is set up to dual boot between Mint [Linux] and Windows 10. The system came with Windows 10 pre-installed and the partition Windows 10 is on was shrunk to ...
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1answer
89 views

Windows 10 UEFI Physical to KVM/libvirt Virtual

Original Post I am migrating my PC from Windows 10 to Linux. There are a few things for which I still need Windows, and I am currently dual-booting, with Windows and Linux on separate physical disks....
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BIOS troubles: Drive is working but won't boot on its own

I've got a Dell Inspiron 5675 AMD64 computer that is not responding when I power it on. It has an HDD with 2 installations of Windows 10, an HDD with Debian, and an SSD with Debian. The SSD is ...
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32 views

How to add/install UEFI driver

I have written my own UEFI Driver using EDK2 from tianocore. I want it to be run each time an OS loads. Do I need to modify the bootmgfw.efi? How to pass control to my BootCheck.efi and only after it ...
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1answer
61 views

Can't find UEFI boot option in BIOS

I am using an old machine which has Intel i5-2410M processor 2nd generation. I am planning to do clean installation of Windows 10 in UEFI as recommended by Microsoft on a recently purchased SSD. I ...
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1answer
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Windows 10 won't boot after moving EFI partition

On dualboot, I had two EFI partitions on two drives. One drive with EFI partition for GNU/Linux, second drive and EFI partition for Windows. I moved Windows boot files from second EFI partition to ...
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Linux + Ryzen + BIOS Firmware = Boot Hell…?

I recently purchased a B450 Aorus M Motherboard with the last of my money to replace my Broken LGA 1151 Socket motherboard, along with a '16 GB DDR4 2400Ramstick and aRyzen 2700` CPU. Upon booting ...
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1answer
45 views

reagentc /enable failing with error code 3bc3, Windows Update failing with error 800F0922

A while back I cloned my Windows partition from my old hard drive over to a new SSD. I'm now having trouble with the latest cumulative Windows update (which is failing repeatedly with error ...
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1answer
42 views

Laptop boot fails after changing boot settings

I'm afraid I heavily messed up a laptop (Dell Latitude E5570, running Windows 7 Professional). Update: I found a way to start Windows … somehow. I'm not sure if running "Startup Repair" from a Win7 ...
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1answer
50 views

Clover Boot EFI file on non-UEFI computer

So I have heard about booting into Clover from a BIOS boot and booting back to the first bootloader but in UEFI mode. Is there any detailed way of how to make such a configuration? I can't seem to ...
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UEFI menu entries with identical loaders disappear

ArchLinux provides 2 boot options: "normal" and "fallback". Both options load the same kernel, but different initial RAM disks. However, I can't create corresponding menu items in the UEFI boot menu. ...
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Why does Windows 10 fail to install on UEFI/GPT laptop?

I'm trying to install windows 10 on a new 1TB SSD I got. fresh install, new drive, new laptop. Dell Inspiron 13 5000. Setup for UEFI. Created a bootable USB using rufus (GPT for UEFI (non CSM)). I get ...
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36 views

Multiple empty partitions after mbr2gpt

I recently cloned my boot partitions from my HDD to my SSD. I then went back to the OS from my HDD and ran mbr2gpt to allow for more than 4 partitions. I did the same for the cloned OS my SSD. For ...
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99 views

“Ghost” blank UEFI entry in Gigabyte BIOS

Background I was trying to install macOS (Hackintosh) alongside Microsoft Windows 10 on my SSD, so I shrank the Windows partition using Disk Management and left an empty exFAT partition next to C: (...
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How to install GRUB2 in BIOS to dual boot 2xUEFI Operating Systems?

My PC is stuck booting to BIOS only (BIOS settings inaccessible due to some kind of corruption), but having a GPT disk with UEFI windows 10 installed, I would like to install Ubuntu in UEFI using ...
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1answer
44 views

Windows Boot corrupted

I made a live USB Installation of Kali Linux which I need for one of my classes. I booted it (UEFI) on my Windows 10 Dell XPS and used the persistence mode since I assumed it would store my changes (...
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38 views

Is there a way to disable a hard drive in the UEFI?

BIOS allowed to disable specific hard drives. However I don't seem to find information about how to do it in UEFI. I would like to dual-boot, but I strongly prefer each Operating System (Which will be ...
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1answer
53 views

How does UEFI detect boot devices in partitions?

How does UEFI detects boot devices ? If I just install linux on some partition, say /dev/sda2, how does the uefi will be able to recognize it as boot entry ? Does BIOS checks every partition ? How ?...
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1answer
129 views

“System Interrupts” process using high CPU

I installed Windows 10 in UEFI mode and have experienced high CPU usage due to a process called "System Interrupts". It takes up 18-30% of my CPU all the time. I've tried installing it on my SSD, on ...
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1answer
101 views

Can't access BIOS - how do I alter the UEFI settings?

Update & Security > Recovery > Restart > Troubleshoot I can't access the UEFI Firmware settings using the path above on my updated Windoes 10 PC. The Troubleshooting options are all ...
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Asus Prime Z370-p reboots to bios after windows install

I'm trying to help a friend get his new gaming pc up and going. He bought it from a company called DigitialStorm, and once he received it, wanted to install a fresh copy of windows. However this ...
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How do I setup Xen with dom 0 Alpine Linux, LUKS LVM and GRUB on a UEFI platform?

I would like to have the following setup: a system in UEFI mode with a hard disk with GPT partitions. The disk should contain an (unencrypted) EFI System Partition, encrypted boot partition and ...
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1answer
55 views

windows trying to mount the entire disk containing ESP partition

I have a dual boot setup with Ubuntu 18.04 and Windows 10, on separate disks. Disk A has the ESP partition and the Ubuntu partition. Disk B has the windows partitions. When I tried to pass the disks ...
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2answers
43 views

Device support UEFI

I now have MBR and I want GPT. My firmware is now Legacy(BIOS) and I want UEFI. My firmware can boot in UEFI (option is there inside). I have Windows 10 PRO. Motherboad: 1949 KBC Version 90.0F ...
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1answer
27 views

Moving Windows partition (EFI, GPT)

Suppose I have a computer that was once a purely Windows desktop, whose disk contained at least the usual EFI System Partition (the ESP) and the Windows partition itself. Suppose that one day I ...
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37 views

Run script after apt-get updates grub

I use Debian 9 on an EFI system with a custom grub image and configuration file in order to make Secure Boot work. However, whenever apt-get updates Grub my customizations get overriden. What is the ...
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bcdedit issue? M.2 SATA to NVME clone: Windows 10 won't boot

Problem: Windows partition won't boot after cloning M.2 SATA drive to M.2 NVME. Background: Cloning process was simple raw dd copy. Drive had EFI, Windows 10, and Linux partitions. Cloning preserved ...
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1answer
45 views

Why does system report less memory in UEFI mode than in legacy BIOS?

I noticed that on a machine, if the firmware is configured in UEFI mode instead of Legacy BIOS, the operating system reports slightly less total memory (this is on Linux, but that shouldn't make a ...
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Cloning back Ubuntu partition after Windows 10 fresh install

I've had a 240 GB SSD for a while and just got a blank 1 TB HDD. I'm dual booting Ubuntu and Windows 7 Pro (on the SSD). I want to upgrade to W10 while keeping Ubuntu, so I moved all my documents/...
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84 views

BCDedit /store BCD /set {default} System cannot find file specified

A friend of mine recently had one of his bootloader files corrupted on his Windows 10 machine. We've tried several times to rebuild the BCD on the EFI partition using bootrec and bcdboot, but neither ...
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2answers
57 views

How to echo a blank line in UEFI shell?

I'm looking for a way to echo a blank line in UEFI shell scripts (*.nsh), similar to the DOS/Windows command line command echo.. While the echo command is supported by UEFI shell, it does not seem to ...
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62 views

Using built-in eMMC SD card slot on UEFI

I have a Lenovo ThinkPad X1 Yoga 1st (20FR). It has an eMMC SD card slot which doesn't seem to be available from the firmware, even though some relevant drivers are loaded: (uefi shell) > drivers ...
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1answer
61 views

How can I make an EFI-bootable partition on an external drive, keeping the existing partitions?

I have a 64GB flash drive with Linux on it (as if it were a hard drive), which I would like to shrink and add another partition to. But to do that, I need another Linux install to shrink the ...
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1answer
69 views

UEFI secure boot prevents Windows 10 from starting after a resizing operation

I'm currently running "Windows 10" with "secure boot" ON and the OS is installed on a SSD drive. I resized the partitions of another drive and the operations went well according to the application I ...
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2answers
73 views

Why does an OS and its installer behave differently depending on whether legacy mode is used or not?

Some context: Earlier today, I attempted to re-install Kali Linux on my machine (dual booted with Windows). To accomplish this, I downloaded the ISO and put it on my Easy2Boot USB stick. In order to ...
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52 views

Re-programming AMI UEFI Bios utility ver. 306

Assume the following "layer hieraky" in relation to bios settings: 1) Top = OS (eg. Windows 7,..10) including boot sector directories/files 2a) Middle = UEFI utility program/menus 2b) Lower = ...
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How to prevent Windows from 10 making its bootloader the default and skipping rEFInd

I have an Alienware X51 R3 to dual boot Linux and Windows 10. I use refind as my boot manager, but Windows keeps skipping it and booting directly to Windows 10. I've been having this problem for years,...
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1answer
40 views

How to stop Gigabyte Designaire X399 / Threadripper 1920x from crashing on resume from sleep with TPM enabled?

When I try to put my Windows 10 (version 1809) PC to sleep, it will not resume correctly, and seems to wipe the TPM settings, meaning I have to recover using my Bitlocker recovery key. Is there ...
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Why is Secure Boot needed if there is already UEFI lock?

As far as I know, enabled Secure Boot feature in UEFI stores signed keys in NVRAM for OSs' kernel images to check it's corruptness on boot level. But nothing prevents me to boot the Setup Menu and ...