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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questions with no upvoted or accepted answers
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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 ...
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MBR2GPT failing with "Cannot find OS partition(s) for disk 0"
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 0. I found this in setupact.log:
GetOSDeviceVolume: Cannot get NT path for ...
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Booting into UEFI shell with qemu
I've set up an environment in QEMU, but I'm having some troubles booting into the UEFI console. I'm running QEMU v 5.0.1 and am running Ubuntu 16.04 using edk2 for my UEFI environment with ...
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How to rename a UEFI boot entry?
I have some trouble with renaming the default UEFI boot manager entry on my acer laptop. When I bought the laptop there was a weird Linux distribution installed on it called "Linpus lite". I then ...
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How to change 'timeout' of the UEFI boot manager from Windows 8?
How can I change the 'timeout' setting of the EFI boot manager from within Windows 8? I am trying to dual-boot Windows 8 and Ubuntu and I would like to be able to choose one or the other OS at boot ...
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Dual Boot Windows (any Version) + Linux (any Distribution) with GPT/UEFI, full system encryption and shared partitions
I didn't think that my requiremetns were too special, but my search really didn't yield too many results, so I still got some quesitons unanswered.
Basically I'm getting new hardware and will do a ...
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Triple booting on a Mac Book [almost there]; boot loader issues
Here is my current GPT/MBR partition table:
Current GPT partition table:
# Start LBA End LBA Type
1 40 409639 EFI System (FAT)
2 409640 663646255 Mac OS X ...
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Cannot repair bcd because the windows installation cannot be found
I'm trying to rebuild my BCD but my windows7 installation cannot be found.
So far, I have typed these commands from the Windows7 install DVD (which I booted in UEFI mode) :
X:\sources>chkdsk /r c:...
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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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Is it meaningful to have an EFI/UEFI boot disk?
I would like to create a minimal boot disk and have the option of DOS, Linux or EFI executables.
As I understand, UEFI is a substitute for classic system BIOSes and has its own byte code definitions, ...
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UEFI bootloader
Issue is that EFI systems only allow you to boot using FAT32. I have to deploy multiple images of Windows 8. My WIM image is larger than 4GB and unable to transfer to a FAT32 partition. I've been ...
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Lenovo G505s and "Default Boot Device Missing or Boot Failed."
I am Using Lenovo G405s and running Windows 8 on my laptop, and whenever I turn on the laptop this error pops up -
SATA HDD : WDC WD5000LPVT-24G33T1 boot failed SATA ODD :
MATSHITA DVD-RAM ...
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Haiku panics at boot "vm_page_fault: unhandled page fault in kernel space"
This is my first time installing an operating system other than Windows, so I'll try to put in extra detail in case I made a stupid mistake somewhere during the process.
I downloaded Haiku from the ...
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Stuck on UEFI splash screen
My PC is stuck on the UEFI splash screen (screen with UEFI logo and F-key options) and the PC isn't responding to anything, including the keyboard, and the only way to exit is to physically shut it ...
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Boot Windows 10 on a machine without UEFI after images were created from MBR and restored on GPT partition table in Linux
A 500 GB HDD that started giving signs of obsolescence had multiple partitions, including Linux Mint and Windows 10.
This is on a BIOS laptop (non-UEFI).
That HDD had MBR partition table. Because of ...
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Selecting entries in boot manager without using keyboard
My goal is rather simple to put in words: I want to install Windows and Chrome OS in dual boot on my Surface Go 2 and be able to select entries in the boot manager without having to use a physical ...
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Is there a way to create a permanent virtual USB drive in WIndows?
Is there a way to create a virtual USB drive, through some UEFI magic that stays there during boot and would be bootable? I have seen recovery programs do this where they create a virtual USB drive or ...
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How does UEFI firmware choose from multiple ESPs?
I am about to install an OS that may create its own ESP when I already have one. I am wondering which one will be actually used; will the firmware, according to the specification, choose one of them (...
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What does the 'n' stand for in the UEFI/EFI shell script file extension?
(U)EFI shells support the execution of scripts much like a typical *nix shell does. These scripts have the extension .nsh. Out of purely esoteric curiosity: what does the 'n' stand for? I feel it's ...
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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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Is it safe to keep the default MOK.priv on after a fresh install of Ubuntu 18.04.2 with secure boot enabled?
I'm new to secure boot strategy. I found there is a default paris, MOK.der and MOK.priv, inside shim folder after a fresh installation of Ubuntu 18.04.2. If I understand correctly, they're there to ...
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How do I change UEFI boot order when the BIOS (the firmware) does not have that option?
I want to change the boot order to default to rEFInd but the system always boots to Windows 10 and I have to use F10 method to boot into Linux via grub and rEFInd. I want to boot into rEFInd by ...
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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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How can I reset the Secure Boot keys on my Surface Pro 4?
I have a Surface Pro 4 and I guess my secure boot keys got messed up somehow. On Surface Pro 3 this fix is as easy as going into the UEFI and resetting to the default keys, but there's no such option ...
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How to install grub2 in windows 10/UEFI laptop
I'm trying to install openSUSE Leap 42.3 on my Lenovo Y600 laptop, dual boot with windows 10. It insists on booting windows, even after trying to re-install grub2. Perhaps the complicating factor is ...
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How to install Ubuntu on Odys Winbook 14 - USB booting via uefi not working
I couldn't figure out yet how to install Ubuntu on an Odys Winbook 14.
Stats:
Intel® Celeron® Quad Core Processor with up to 4x 2,2 GHz Burstspeed
35,56 cm (14") 16:9 Full-HD IPS Display (1.920x1....
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Why when I try to update UEFI FW I get "Please make sure the flash is not write protected"?
I'm a user of the Minnowboard MAX from Intel which brings UEFI as the boot manager. In order to test different OS (32 and 64 bit) I need to change the FW of the UEFI from 64 to 32 and viceversa.
At ...
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Cannot update Windows 10, get winload.efi error 0xc0000225
Can anyone tell me how to update my Windows 10 64-bit computer to the latest build? I would prefer an option that only uses official Microsoft tools and does not involve deleting all my files, but I'...
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How to configure a MS Surface Pro to restart after AC power loss and restoration?
I have a MS Surface Pro that is being used as a kiosk. After an AC power failure and then restoration of power, I want the PC to turn itself back on. I have looked at the BIOS/UEFI of the device and ...
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Laptop not booting from any bootable device (UEFI broken?)
I was trying to install Debian in a dual boot with the already installed Windows 10 on my laptop. Now when I boot up the PC it shows the Dell logo and the options to press F2 for Setup and F12 for ...
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Laptop boots extremely slow; black screen
I have a Toshiba Satellite L50-B-2G9, which takes hours to boot.
Initially I had Windows 8.1 and Ubuntu 15.10 installed side-by-side and switched between them regularly. I noticed it took longer and ...
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Starting a custom UEFI application from Windows Boot Manager
Is it possible to make a boot menu entry in Windows Boot Manager BCD to start a custom (signed) UEFI application like, say, GRUB or Intel's UEFI Shell? What are the relevant bcdedit commands? It is ...
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Installing Windows 10 on a Samsung 850 EVO SSD gets stuck at "Copying Windows files (0%)"
Recently, I acquired a Samsung 850 EVO 120 GB SSD to use for OS (Windows 10) installation. After creating a bootable USB installer (using Rufus) and booting from it, I can do the following things:
...
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Does unetbootin work in win 10 with UEFI mode?
I would like to install Ubuntu 15.10 using unetbootin and no usb key -thus using unetbootin with Hard Disk (frugal) install mode.
However nowhere in the documentation could I see if unetbootin will ...
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SSD causes UEFI to load very slow on reboot (~15 sec)
I've recently bought an ADATA Premier Pro SP900 128 GB M.2 . It works fine , it's fast , but I have one issue with it .
When I start the laptop , UEFI loads fast in a second or so , goes to my ...
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UEFI-Implementation-Issue (can lead to a hard-brick) - ASUS Zenbook UX303LA-R4342H
Question-State: solved (not really but it basically works)
Edit (Current-Progress): ASUS released a new "BIOS-Update" (BIOS 210; Update FW) which fixes the "BIOS-Settings" issues, but I'm not sure if ...
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Windows 7 changes my uefi default boot when it starts
I installed Windows 7 in a HP Compaq 6300. First I disabled secure boot and enabled legacy mode. Then I installed Ubuntu in other partition. Ubuntu detected some uefi partitions and let me create / ...
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Cannot boot Windows 8 install cd in uefi mode
I have a Toshiba Satellite that came with windows 8 pre-installed on it. After foolishly wiping the HDD, I acquired a Windows 8 install disk.
My problem is that the computer will skip attempting to ...
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Attempting to install Windows 8.1 as secondary OS, misdetects EFI partition
Currently I have Arch Linux installed as my primary OS, and wish to install Windows 8.1 as a secondary so I may utilize certain special hardware (a capture card which has no Linux drivers at the ...
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Tails "clone" LiveUSB wont boot
I'll try to be as clear as possible.
I did install Tails to a USB, then I cloned it over another USB and thats where the problems started.
The "clone tails usb" won't start in my laptop. I did try ...
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Suspend only works once after full power cycle with Asus P8Z68-V PRO GEN3
This one is strange. I can't seem to get suspend working more than once per power cycle. When I say "power cycle," I mean the only way to get one proper suspend is to cut power from the power supply ...
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Unable to boot into Windows 10 (UEFI)
My laptop comes with 1TB spinning hard disk and 16 GB SSD for Caching. The SSD caching was not working after doing a clean install of Windows 10 Pro.
While trying to enable SSD caching, I decided to ...
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Can't boot windows usb-stick with UEFI
I currently have win10 laptop, so i created bootable usb with MediaCreationTool, FAT32.
And when Im trying to boot it from totally clear pc, UEFI doesn't recognize flash. In case if I clear CMOS, it ...
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how to disable hard drives in UEFI bios?
sometimes I need to disconnect a hard drive. I have to open my computer and unplug the sata power cable.
I am wondering if its possible to disable the hard drive in UEFI bios.
I am using asus p8p67 ...
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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 ...
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How does PCIe card vendors sign option ROMs?
If secure boot is enabled UEFI system would permit to run only signed Option ROMs.
I presume PCIe card vendors want their devices to work even if Secure Boot is enabled. Therefore how does PCIe card ...
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Unable to boot even from usb drive
Problem description
After shutting down my computer last night and starting it again this morning, I have for no apparent reason lost the ability to boot into either of the installed OS (Windows 10 / ...
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SSD no longer recognized after attempted Ubuntu installation
I have attempted to install a dual boot of Linux (and my existing windows 10), but since the last attempt, one of the hard drive has disappeared.
The original setup was two drives, the first of which ...
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Can I use my own driver on Windows without having to ask MS for permission while keeping Secure Boot on?
As per the subject :
I want to write my own kernel mode driver
I want to be able to use it with Secure Boot on
I don't want to ask for permission to use it (no WHQL testing or attestation signing)
...
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How do I format disk from UEFI shell?
I need to format 2 disks from pre-built UEFI shell.
So I have 2 questions.
How do I format a disk from UEFI Shell?
How do I know what is the disk name or label?
By the way, in the first question I ...