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Questions tagged [uefi]

The Unified Extensible Firmware Interface (UEFI) is a specification that defines a software interface between an operating system and platform firmware. UEFI is meant to replace the Basic Input/Output System (BIOS) firmware interface.

The Unified Extensible Firmware Interface (UEFI) is a specification that defines a software interface between an operating system and platform firmware. UEFI is meant to replace the Basic Input/Output System (BIOS) firmware interface.

For more information see:

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How can I boot an os on a clean pc?

I have made bootable an USB key with mint on it. But when I launch my PC HP Pro Book x360 11 GE EE: it checks the harddisk and sees no boot device with the error hardDisk 3F0 which is normal because the pc is clean. But when I try to boot it with my…
pyno prog
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How to identify a Yubikey (5 NFC) by its HID report descriptor

I want to access the Yubikeys FIDO2 functionality under UEFI. The FIDO2 specification says a FIDO2 device can be identified by checking the USB interface (class 3, subclass 0 und protocol 0) and the HID report descriptor (usage page 0xF1D0). When i…
MiSimon
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How to print in UEFI WITHOUT usage of UEFI.h or any other library

I want to learn how printing works in UEFI but can't find any reliable resource that details the function. I don't want to copy from the library as that won't tell me much of how it actually works. Can anyone please explain how printing in UEFI…
block103
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Looking up model name based on either VID/PID or device ID

I am using a database of monitors that contains either of the following pieces of information for each monitor, either (a) 4-character vendor ID and product ID, or (b) a 7-character device/hardware ID. I would like to use this info to obtain the…
KAE
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EFI boot order always resets after a reboot

I've recently set up a dual boot between Windows 10 and Arch. Unfortunately the Windows Boot Manager always boot first. I've already tried to change the sequence via efibootmgr -o but after I reboot it always resets it to to Windows boot manager…
Susouker
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EFI_FILE_HANDLE->Write crashes when writing more than about 3.4 GiB

I'm writing an UEFI application that should be able to write a lot of data to disk. I'm aware of the FAT-32 file size limitations and number of files per directory etc. That should not be the problem. The memory region I'm trying to write is marked…
AlexRoot
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How to install archlinux EFI grub with MBR (msdos) partation table?

As we know, EFI boot is not limited to GPT partition table, and MBR is ok. I've a legacy disk with msdos partition table, and I'd like to reinstall it into archlinux. In wiki: https://wiki.archlinux.org/index.php/GRUB#UEFI_systems it also said that…
Adam
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UEFI Settings Missing

I am running WINDOWS 10 x64bit on ACER E5-521 AMD Processor I need to turn on VT-x from UEFI Settings But I can not find it here. Is there any reason why it is like that on my machine?Below is a link of a snapshot of my screen. Please check and…
godswillumukoro
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How to turn on the Security boot for MS Win10

I need to turn on this mode for test of my new drivers. My operations: In bios I set a support of UEFI Enable the option Security boot. Reboot PC Load msinfo32 and see BIOS is in UEFI Security boot is in off. Why????? My OS is MS Win 10 x64…
victor kulichkin
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List of Programs that PC ROM have, Which supports the UEFI

List of programs that UEFI ROM have, And how to call them from other programs
Lakshman Siddartha
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VT-x is not holding the enabled status after rebooting the Dell PowerEdge R610 server?

I am trying to install ESXi-6 and vCenter using the VCSA-6. I enabled the VT-x and built the ESXi, but when I am trying to install the appliances I am getting error messages due to the VT-x (Message: VT-x is disabled). But I did enable VT-x and…
Hussain Busatm
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Failed to add external hard disk with FreeBSD 10.1

I am trying to add a 4 TB external hard disk to my Freebsd server connected to a USB3 port and i am facing the following problem. I am able to format this disk using : sudo gpart create -s GPT da1 sudo gpart add -t freebsd-ufs da1 sudo newfs -U…
Thierry
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Debian 8 Jessie UEFI Install

I am installing Debian 8 Jessie on a UEFI system. I have to set up RAID so I am using manual partitioning. The system installs fine in BIOS compatibility mode but there doesnt seem to be a UEFI installation option in there. Is there a non-obvious…
user1525614
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Ubuntu wont boot after boot mode switch

I have a toshiba p850 laptop with ubuntu 14.04 (used to be win 8\ubuntu). Everything worked fine for many months. I mistakenly changed the boot mode from uefi to cms and ubuntu doesn't boot. Of course, after realizing the mistake I set the boot mode…
R. Amorim
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Surface pro 3 in kiosk mode, how to automatically power on when the power is connected?

Most pc's had the nice option to power on a computer automatically when the power is applied (via the bios). With the surface pro 3 this is not an option (absent in the uefi boot menu). If you are (planning on) using the Surface pro 3 tablet (or any…
Wouter Schut
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