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

Filter by
Sorted by
Tagged with
1 vote
0 answers
76 views

How do I delete an old boot option that doesn't show in bcdedit?

I converted my ssd from MBR to GPT. Now in the BIOS I have 2 boot options with the same name, which is "SSD name Boot Manager". Booting into the first boot option doesn't work but the 2nd ...
blahahaaahahaa's user avatar
0 votes
1 answer
18k views

How to access advanced setup (BIOS/UEFI) on Lenovo IdeaPad 5 Pro

Does anyone know how to access advanced option in setup (BIOS/UEFI) on Lenovo IdeaPad 5 Pro? I tried to google for it but combinations I found don't work. I tried: FN + all keys from Q to P, A - L, Z ...
DonAndress's user avatar
0 votes
0 answers
116 views

Black screen and blinking underscore post BIOS to UEFI change

I encountered an issue with my Win 11 pc yesterday. I did a conversion from Legacy BIOS to UEFI but was unsuccessful. My reckless approach made me skip an important step which led to my pc not booting,...
K9.run's user avatar
  • 1
1 vote
2 answers
1k views

QEMU (with virtmanager) boots to uefi shell when trying to install windows 11

I'm trying to make a windows 11 qemu VM on my arch linux install but when I start it it shows: this what can I do to make it boot normally into the windows installer with UEFI and secure boot?
Maxb0tbeep's user avatar
1 vote
2 answers
2k views

Converting a partition to EFI boot, at a particular location on disc, from scratch

I have a drive that developed a boot failure after a crash, with the BSOD error code 0xc0000098. It was one of those crashes that proved utterly resistant to every technique I know for BCD recovery (...
John Lasseter's user avatar
0 votes
0 answers
628 views

Can't boot from USB UEFI

So, I just got this mobo (biostar h61mvg3) and trying to install Windows 10 on it. It was fine installing with legacy boot I got no problem. I decided to change my drive partition to GPT, and I need ...
Steamedrice's user avatar
0 votes
1 answer
617 views

How to add MBR to existing UEFI USB boot device [duplicate]

I have some old legacy laptops that allow UEFI booting from the hard drive, but not from a USB flash drive. My everything flashdrive is UEFI only. Can I add MBR booting on my flash drive without ...
John's user avatar
  • 1
0 votes
0 answers
43 views

How to make bootable EFI USB Stick boot from harddisk with existing Windows EFI boot parition (add second boot partition) [duplicate]

I have a bootable USB stick created using PEBakery on a Fat32 partition that resides on a USB flash drive. When I insert this flash drive into a USB port of my computer and boot, it will be recognized ...
Erik's user avatar
  • 1,399
0 votes
2 answers
4k views

How can I access the .efi directory of the bios and replace the .efi (specifically BOOTX64.EFI) files?

I believe the .efi files are screwed up, some way, some how. When I first got this machine, not long ago, I had no problem booting into a Windows 11 install disk, installing the OS, and had successful ...
elzorroazul777's user avatar
0 votes
1 answer
448 views

Why can Debian 11 no longer load after Windows 10 changed motherboard state?

Note that this question is not a duplicate of the typical dual-boot questions, because I never have the Windows-HDD and Linux-SSD at once in the PC, so they cannot touch each other's (efi) partitions. ...
flugosfutam123's user avatar
0 votes
0 answers
156 views

Dual monitors, UEFI windows 10 Pro HDMI and DVI. Swapping the cables changes identity' from 1 to 2, 2 to 1, boot still posts on the right monitor. why

Dual monitors, both DVI connections, one HDMI adapter to use both outputs on GTX 730. Monitor on left primary, right secondary, boot posts to secondary monitor. I swap the cables so both monitors ...
Dram Buoy's user avatar
1 vote
0 answers
122 views

Physically moving a Linux system HDD to another machine (Windows)

I have a functioning Unix Linux system (Ubuntu server) on machine A and a functioning Windows (10) on machine B. I would like to only keep B by moving A's HDD into it and create a bootloader to choose ...
Martin's user avatar
  • 135
2 votes
1 answer
1k views

Restarts boots into BIOS. Turn off/on boots into Linux

On a fitlet-H PC I have installed a brand new SSD SAMSUNG 870 EVO 1 TB. I have tried installing both Linux Mint and Ubuntu MATE and I have the same boot issue. If I turn off the PC and then turns it ...
Stig's user avatar
  • 21
1 vote
1 answer
1k views

Re-adding .efi file to uefi boot

After upgrading to windows 11 my Kali Linux entry disappeared from the Boot menu. When I hit F9 (select boot device) I can select windows, or I can browse the efi partition and select the grubx64.efi ...
JoSSte's user avatar
  • 403
1 vote
1 answer
371 views

Setting up the EFI Shell in Qemu to allow for Http requests

I am developing an UEFI App that will need to perform a GET request through http. As a start up point, I want to make sure my setup is working properly so that the http requests can actually go ...
CrossedCarpet's user avatar
1 vote
1 answer
938 views

BIOS setting to power on after power loss isn't working properly

What would make a PC to fail to automatically power on after power loss when it's configured to do it like that on the bios? The PC works well otherwise and sometimes powers on automatically after the ...
Héctor's user avatar
  • 156
0 votes
0 answers
174 views

Installing Linux without access to a keyboard or screen

I need to do an unattended install of Linux on a Windows 10 machine without a screen or a keyboard for dual-booting; or replacing Windows entirely if that's easier. I can access the machine remotely ...
Q-bertsuit's user avatar
1 vote
1 answer
960 views

Boot Problems: Windows 10, 1234F: Prompt, NeoSmart and SecureBoot (UEFI)

My issue is different from the other people who have had this issue. I used to dual boot Windows 10 and Debian 9. A Windows update changed the boot loader and I was unable to boot either. A NeoSmart ...
Dave Brunker's user avatar
1 vote
1 answer
573 views

Boot loop after uninstalling Ubuntu from dual boot with Windows 11

My case is GPT scheme and UEFI system, Xiaomi Redmibook 14 laptop. I was having dual boot Windows 11 + Ubuntu 22.04 and decided to uninstall Ubuntu (it was installed with Rufus, selected GPT and UEFI)....
mealshot's user avatar
0 votes
2 answers
3k views

How to underclock/undervolt Ryzen 7950x permanently

I've tried 2 different methods of undervolting/underclocking but I cannot make them permanent. As recommended by https://overclock3d.net/reviews/cpu_mainboard/amd_eco_mode_guide_for_am5/1, I tried ...
Coder12345's user avatar
1 vote
0 answers
343 views

Grub2 commands to automatically boot from Windows (UEFI installation & BIOS firmware)

The following chain of commands works when Windows is installed in UEFI and UEFI firmware is present. If Windows is installed in UEFI and that in combination with BIOS firmware the command will not ...
AlexIoT's user avatar
  • 11
1 vote
1 answer
254 views

Windows partition is no longer detectable, how can i fix this?

Long story short: I bought this new flamboyant pc with Windows 11 preinstalled on it, and I wanted to set up a dual boot with Debian. I'm not a Debian pro (more familiar with Ubuntu), so i tried quite ...
ArtBalar's user avatar
1 vote
2 answers
546 views

Using an EaseUS pbd backup with VMWare Workstation - winload.efi error

Hopefully someone can offer some assistance. I have a Windows 10 pbd backup that was create using EaseUS. Pretty sure something is wrong with the boot settings in this backup, but it is what it is. ...
Daniel Cohen's user avatar
0 votes
1 answer
377 views

How can I install Windows on two separate disks separately?

I want to have two separate Windows installations on two separate disks on my PC (with Secure Boot enabled). The first installation succeeds and works fine, but when I try to install another Windows ...
stackprotector's user avatar
-2 votes
1 answer
97 views

Can one manufacturer's uefi updater/flasher (.exe) be used for other manufacturers' devices?

https://www.reddit.com/r/SteamDeck/comments/tyuu84/comment/i3vfve2/ According to this comment, it is okay to "grab a Lenovo uefi update pack" and extract the .exe uefi flasher from it, then ...
Sij's user avatar
  • 37
0 votes
0 answers
536 views

Dell T3600 UEFI - Setup shows black screen, Windows boots only legacy

I've had a Dell Precision T3600 (used / refurbished) for about two years now which is out of support. I want to reset and reinstall and pass it on to someone else because I replaced it with a newer ...
Silberling's user avatar
0 votes
0 answers
189 views

Strange NVME Drive Behaviour with Arch/Windows 11 Dual Boot

I've got two nvme drives in my system, one with Arch on it, and the other with Win11 on it. Both operating systems share an EFI partition on the Arch drive. I've noticed that the Windows drive ...
ScottishTapWater's user avatar
4 votes
1 answer
3k views

What does grub-install's --removable flag do?

GRUB2's grub-install has a --removable flag, but all the man page says is that it signifies "the installation device is removable." The documentation likewise just says "For removable ...
Jesse's user avatar
  • 143
1 vote
1 answer
1k views

Stuck on this MBR2GPT (Cannot find OS Partition) issue

I'm trying to use MBR2GPT to convert an MBR/BIOS disk to GPT/UEFI. I'm getting the error Cannot find OS partition(s) for disk 4. I found this in setupact.log: 2022-12-07 15:38:24, Info ...
Vikthor Ferreira's user avatar
0 votes
1 answer
7k views

How to get rid of an extra Windows Boot Manager entry in UEFI?

My system firmware is seeing two Windows boot manager entries, on the same device. It has only one EFI partition, and only one of the entries boots properly, how do I know where it is and how to ...
Didi Kohen's user avatar
0 votes
0 answers
297 views

EFI boot option disappears after backingup or restoring efi partition with clonezilla

I am using clonezilla to backup and restore a laptop. It is imaged with a flavor of Debian linux (bullseye), the lay out of the disk after installing the OS is: sda/ sda1 - EFI partition sda2 - grub ...
paxamus's user avatar
  • 164
0 votes
1 answer
798 views

Create a backup of the EFI partition on a USB

I have Ubuntu on M.2 disk y Windows 10 on un SSD I had install windows with ubuntu already installed, Windows has put its bootloader in the EFI partition of Ubuntu, since the M.2 disk is the first ...
Mario's user avatar
  • 101
0 votes
1 answer
1k views

First boot fails after every shutdown, which also resets the BIOS

I recently replaced my motherboard and CPU in my computer, and have noticed a significant issue with my motherboard. Every time I shut down my computer, powering it back on results in boot failure. ...
FireballFoxtrot's user avatar
1 vote
0 answers
63 views

How is display initiated after sleep mode? Does the BIOS/OS uses the EFI partition?

I'm having some weird lines displayed in my screen after my computer goes to sleep mode and when I turn it on. These lines are displayed randomly and I think it has something to do with the EFI ...
Álvaro Rodríguez's user avatar
3 votes
1 answer
2k views

Windows bcdedit stores config parameters in NVRAM? what does it mean?

In Win10 bcdedit /?, the help text says it will store boot configuration parameters in nonvolatile RAM (NVRAM) entries. Is that ridiculous? As far as I know, bcdedit stores configs in disk files. To ...
Jimm Chen's user avatar
  • 5,884
0 votes
0 answers
434 views

How to install grub when / is encrypted (luks) and /boot is not encrypted

I have the following partitioning: |------+-------------+-----------+------+-------+----------------| | Name | Mount point | Flag | Size | FS | Comment | |------+-------------+-...
crocefisso's user avatar
0 votes
1 answer
2k views

Move or create new EFI partition on different disk

i have a windows install on disk 1, and arch linux on disk 2, i use the default 100 MB windows boot partition on disk 1 for both windows boot manager as well as grub to boot linux (os prober failed to ...
Banan Przydawka's user avatar
1 vote
1 answer
795 views

Can't change boot order on Lenovo L13 Yoga - BIOS isn't locked

I have a ThinkPad L13 Yoga, which I like quite a bit Earlier in the week, I booted it off of a Live Ubuntu disk to make a full Ubuntu installation on a USB drive. That worked flawlessly However, a new ...
Psychon Night's user avatar
0 votes
0 answers
3k views

USB drive is not recognized in USB 3.0 port, in USB 2.0 is OK - in BIOS [duplicate]

My problem is that BIOS does not see my USB drive inserted into USB 3.0 port. However if i insert it into USB 2.0 port then its recognized and i can boot from it (My aim is to boot Linux in ...
tracid1987's user avatar
-2 votes
1 answer
281 views

Default Windows 10 64 EFI partitions / partitioning scheme

Sometimes you need to partition your disk which already contains a different operating system (OS) or version of Windows thus you use Linux tools such as fdisk or gdisk to create/configure partitions ...
Artem S. Tashkinov's user avatar
0 votes
1 answer
750 views

Stuck on MBR2GPT issue

I wanted to convert my MBR Windows disk to GPT because I cannot upgrade to later Windows versions. Found the in-place upgrade tool (mbr2gpt) but running into multiple problems. This is my Disk ...
InSr33's user avatar
  • 1
8 votes
0 answers
4k views

How to create Boot Menu Entry in UEFI Settings using bcdedit w/o copying existing {bootmgr}

Note – This thread How to add UEFI image boot option in BCDedit? is similar but the answer there is irrelevant as it does not describe my case. This thread How remedy situation with two EFI ...
rajeev's user avatar
  • 1,646
2 votes
1 answer
3k views

Boot a legacy BIOS OS on a GPT mass memory?

I installed Windows 95 (legacy BIOS OS) with DOSBox on a 64 bit PC, on a FAT32 partition (with (I hope) its PBR (partition boot record)) on a GPT hard disk, with UEFI Windows 11 and the ESP (EFI ...
jebez's user avatar
  • 21
0 votes
1 answer
5k views

How remedy situation with two EFI partitions on one drive?

I've got a laptop with two EFI partitions, one for Windows, one for PopOS (I know now this isn't a stable configuration). It was working great for a while - I was able to switch between the two (in ...
UpTheCreek's user avatar
0 votes
1 answer
623 views

Add DXE driver to an OVMF image

This is an attempt to follow the first bullet point in this answer. Goal Create a development environment to test that my DXE drivers are being properly injected into an UEFI firmware image. First ...
DMeneses's user avatar
0 votes
2 answers
92 views

Problems booting Windows in virtual machine with separate disks for boot and main partitions

I have restored a Windows 11 system from a partition-level backup of the main partition. The system boots, but only with manual intervention. Initially, it enters a recovery screen (see upper image). ...
brainchild's user avatar
3 votes
1 answer
10k views

Cloned Windows 10 won't boot

Issue: Windows 10 clones to same disk/different SSD won't boot. Why: I've got a M.2 NVMe with the following structure: 300 MB Recovery Partition 100 MB EFI System Partition Windows 8.1 Unallocated ...
Rhaenys's user avatar
  • 822
1 vote
1 answer
663 views

Boot stuck on Dell logo after changing GPU, Secure Boot enabled

I have recently bought and installed an AMD RX Radeon 6600, and now my computer gets stuck at the Dell logo and I cannot get to the BIOS or anything else. After investigating, I found that if I ...
Coffee'd Up Hacker's user avatar
0 votes
2 answers
5k views

Mini pc won't turn on with power button, but WILL turn on using the power button if you unplug power and plug it back in

I have a small mini-pc from Aliexpres with a celeron n5105 in it, 16gb RAM and 500gb ssd (both Crucial brand). It is running Proxmox (Debian) and it was working fine. After some fiddling around with ...
Joost00719's user avatar
0 votes
0 answers
167 views

Can't use or install Microsoft Windows after changing disk to GPT partition style to use Linux

I am having some trouble installing Windows or using it, originally I had an MBR partition table which only allowed three partitions and I wanted to install Linux and I couldn't so I changed MBR to ...
DanielJMMW's user avatar

1 2
3
4 5
39