Questions tagged [bios]

The Basic Input/Output System (BIOS) on an x86 PC is the firmware that performs the power-on self-test (POST) and initializes hardware.

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How to calculate boot time including (BIOS and boot loader) of RedHat 7 or 8 versions?

systemd-ananlyze time gives me the time taken for kernel, initrd and userspace. How do I calculate for BIOS and bootloaders like GRUB2 etc which completes calculation of the boot time of the OS. ...
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UEFI pre-boot environment exception when booting with custom-built Linux kernel

I'm trying to build Linux kernel from scratch. My current system with an Intel Xeon Gold 6242 CPU, running Linux 5.4.0-050400-generic kernel on Ubuntu 20.04.3 LTS. The steps I have followed to build ...
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How do I check the BIOS version number on OpenBSD?

On Linux I would do something like dmidecode -s bios-version as root. What is the equivalent for OpenBSD?
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Lenovo thinkpad T440s stuck on boot (broken BIOS?), after installing Fedora workstation 36 from USB

I have installed Fedora workstation 36 with USB media by Fedora media writer onto my laptop, Lenovo T440s. (The previous OS was Windows 10 pro) Installation seemed to complete successfully, but after ...
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Install Linux without an installer: Can it be done? [duplicate]

I have a machine with Lubuntu on a very old Mobo, Asus P5KC with Megatrends BIOS v 2.58, and, although I could swear I installed it from a USB pen, the BIOS won't recognize any as a boot device (the ...
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How to get back my windows and windows loader?

I installed a Linux (Fedora) as second OS. I did like that so many times but with other distros. After installing I tried to boot in my first OS (Windows 11), but in a grub I didn't see her. I tried ...
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Can libvirt/qemu set the enoX number as if it were a physically numbered hardware port?

Recent Linux distributions use Predictable Network Interface Names (from udev) which states that "device names [like eno1] incorporate firmware or BIOS-provided index numbers for onboard devices.&...
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How to run custom kernel and initrd in UEFI?

I have a dev machine with BIOS and after compiling my kernel and initrd, I'm able to use it with a simple menuentry: menuentry "mlinux" { linux /boot/mlinuz quiet initrd /boot/...
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HP Elitebook - Cant selec't linux mint as firts bootable OS

I have a second hand HP Elitebook Folio1040 that had windows10 installed. I deleted windows and installed Linux Mint Una (20.3), rebooted the PC but I can't manage to boot Linux automatically. After ...
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Why would Linux boot from a USB drive but not a hard drive?

I have a x86_64 Linux Kernel, with EFI_STUB enabled, and packaged into a EFI System Partition that I compiled using Buildroot. It generally will boot on any machine by just dd'ing it to a device and ...
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Reset my BIOS. Now how do I fix "Invalid signature detected. Check Secure Boot Policy in Setup."?

Follow up to Grub updated and now I can't get in to the BIOS, how can I fix it?. Short version: couldn't boot to a USB thumbdrive after updating grub. I reset the BIOS to factory default (with the ...
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Grub updated and now I can't get in to the BIOS, how can I fix it?

Mint 20.2 system. Need to get to the BIOS so that I can boot from the USB stick into GParted, which is suddenly not happening automatically. I upgraded all my packages an hour ago (pretty sure grub ...
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GRUB menu selection problem on dual boot windows10 and Ubuntu 22.04 encrypted

The Grub menu appear a fraction of a second (flickered), and auto launch the first option in it's menu, which is Ubuntu. The problem appear after I reinstalled Ubuntu22.04 Encrypted. I don't know if ...
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Is my server using Legacy BIOS or UEFI?

I am little confused about something. I have a server on Digital Ocean, I want to know either BIOS or UEFI used for system startup. I have tried following things: root@debian:~$ dmidecode -t 0 # ...
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Secure Boot is enabled and cannot be toggle off in Bios

The problem is pretty self explanatory. I am using bios 2103 on an Asus Z87-Expert. I need to disable secure boot for this reason. My machine dual boots to windows or linux mint using Grub. See ...
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Unmount /boot after booting

For some highly secure bastion VMs I'll implement soon, I am considering to unmount /boot after booting - among other measures of course. Will be mounted only for updating kernel. Testing this, no ...
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Dual Boot isn't working; cannot come back to Windows

Two days ago I try to make a dual boot (I have BIOS Legacy) installing Ubuntu 21.04 in addition to Windows 10. Initially I think all was ok, I formatted an USB and converted it in a flash memory with ...
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Dual boot keeps booting to windows

My setup: 1 hdd with Windows 10 installed 1 ssd with Archlinux using systemd-boot installed Motherboard: MSI X470 Gaming Pro I first installed Arch, then Windows 10 and the dual boot worked like a ...
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Grub w/Kali Linux Dual Boot not working after Motherboard replacement

After the replacement of the motherboard, grub is not visible on startup. Before replacement, grub boot loader used to show up on startup with Kali Linux, Windows 11 options available. I can manually ...
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laptop second hdd in caddy does not show in bios but shows up after ubuntu boots

I have installed a second HDD in my notebook via a DVD-HDD caddy. My laptop is a Lenovo Ideapad 110 15ISK I want to dual boot Ubuntu (primary SSD) with Fedora (caddy HDD). My observations: caddy with ...
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No linux will boot after BIOS update

I am now leaning towards a hardware problem, any advise is appreciated.. Gigabyte Z590 Vision D I9 11900K 3 Nvme SSD's - one Western Digital, one Sandisc, one Samsung RTX 3090 TPM Enabled > this ...
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The process going on in BIOS and UEFI when they want to choose bootloader in dual boot systems

I learned something about bootloader, UEFI and BIOS but now i have question about them. at first I want to know how BIOS can decide which bootloader should load in dual boot systems In UEFI i know we ...
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After updating my bios kali linux not anymore showing up

After trying some troubleshooting and most common fixes like https://askubuntu.com/questions/1036980/grub-does-not-load-after-bios-update https://forums.kali.org/showthread.php?35205-GRUB-loader-not-...
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Enabling KVM without BIOS setup

I'm running Debian 11 LXDE in an old notebook and during the boot I'm receiving the following message: root@debian:~# dmesg | grep -i kvm [ 20.501228] kvm: disabled by bios [ 20.541824] kvm: ...
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Touchpad is only working when entered startup menu

I am trying to figure out what may be the cause that a touchpad on my hp notebook is working only if I enter startup menu (whether by pressing esc at startup or from grub) and by adding i8042.nopnp to ...
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EFI partition in Linux mint MATE on non UEFI BIOS

So I just installed Linux mint MATE(install along side windows(7)) on my old laptop. Its an MBR without UEFI BIOS. When I headed over to the disks program after the installation I was shocked to see a ...
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decoding failed, system halted during legacy boot (possibly due to large SATA drive attached)

I booted liveUSB stick based on Linux Mint 20.2. After outputting initrd line (one after vmlinuz) I got empty screen with "decoding failed, system halted" (tried twice, error got reproduced)...
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BIOS UEFI mode settings

I want reinstall Debian11 from LiveUSB, in UEFI mode: should I disable in BIOS these two options: "Secure Boot: disabled" and "Load Legacy Option Rom: disabled", apart from set ...
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Debian unbootable after second install

I have debian on /dev/sda, I added a new drive /dev/sdc and installed a separate debian on it, now when it boots the new grub loads and it doesn't have my old debian in it. When I go into the bios and ...
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Ubuntu login issue with broken laptop screen

My Samsung laptop has a broken screen, hence I'm using an external one. However, external displays only in extended mode. After Ctrl+Alt+F1 I can start the terminal .... but .... apparently I forgot ...
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How to Update bios on Dell OptiPlex 780 with Ubuntu 21.10

I got a used Dell OptiPlex 780 with no os; I installed Ubuntu 21.10 on it. I wanted to upgrade the processor, but you need the latest BIOS available; I have to upgrade. The upgrade I am trying to ...
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Command to install GRUB2 on a BIOS boot partition

For a BIOS system with a single GPT fixed volume and a freshly-created BIOS boot partition at /dev/sda1 carrying the bios_grub flag, is the correct command to install / embed GRUB2 (i.e., core.img) to ...
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How to re-enable UEFI mode on Debian fresh install

I replaced hard disk on laptop (2014 model) and made fresh install debian-11 in UEFI mode. Originally laptop come with Ubuntu factory-installed and Legacy BIOS (single OS). So I tried to make a clean ...
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How to create a GRUB BIOS boot partition using sectors 34 to 2047?

How can I create a partition for the GRUB legacy boot of GPT disks using free sectors between the GPT (33) and the first aligned partition (2048)? If I already have partitioned all other sectors, ...
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Deepin & Windows dual boot - still booting only Windows

I've recently installed Deepin by creating a partition on my SSD (50% each). I already had Windows 10 installed, then I installed Deepin 20.3 from a bootable USB and it went without a problem. When ...
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Flip meaning of 'fn' function key - e.g. F5 by default, Mute-Sound media key only when 'fn' is pressed

I don't know if it's the keyboard model or a change in the system. After moving from HP Zbook G3 with Debian 10 to Zbook G8 with Debian 11, the way the function keys on the laptop are used has been ...
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Show if disk or partition is BIOS bootable or UEFI bootable

I have a pen drive or disk and it's reachable under /dev/sda and the partitions are under /dev/sda1 /dev/sda2 /dev/sda... I want to know for the disk itself and for each partition: is it classical ...
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Lost boot option 'debian' after switching between UEFI and Legacy

In a stupid attempt to test something I switched between UEFI and Legacy on my Dell XPS13 where I am running Debian Bullseye on an encrypted SSD. Sofar I have tried several things according to the ...
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Command to reset the system to a state as close as possible to the state after a reboot?

Which commands should I run in a Linux / Ubuntu server to reset the currently-running system to a state as close as possible to the state after a reboot? (without actually rebooting!) I can imagine ...
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How to reboot on a specific device from command-line?

I have the following disks: /dev/sda /dev/sda1 EFI partition /dev/sda2 Windows /dev/sdb /dev/sdb1 EFI partition /dev/sdb2 Linux <-- currently mounted as / and I am ...
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How do I completely remove openSUSE secure boot?

I was using a dual boot of openSUSE and Windows and I decided to delete OpenSUSE by deleting the partition. On rebooting, I found out that the secure boot for openSUSE was still there, leading to an ...
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Changed grub-default in encrypted Manjaro Linux/Arch - BIOS shows up after decrypting

System Fully encrypted Manjaro Linux Problem I tried to downgrade my kernel, modified the grub. Now when Im booting, the screen appears in which I need to enter the decryption key. Everything fine ...
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Can't boot laptop at all after installing Mint 20 (GRUB messed up)

I am, forgive me, a total newbie, but two days ago excitedly installed Mint Cinnamon 20 on a Medion Akoya E2215T laptop. I made several changes as per some tutorials, like decreasing the swappiness, ...
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Debian 11 Setup fails with a shim_init() error

Basically I have the same problem as described here (https://linux.debian.user.narkive.com/csvu5OQJ/shim-init-error-for-debian-live-11-0-0-amd64-kde-iso) but I don't have a solution. The only ...
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ACPI BIOS Error (bug) Kali Linux

Hi all I am using Kali Linux. It is working okay but logs in dmesg show that I have this error. I have googled it but not having any luck and before you say anything look at the screenshot yes it can ...
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How to install dell command and configure tool on dell inspiron 5520 running ubuntu 20.4?

I am trying to install dell command and configure on my dell inspiron 5520 runing ubuntu 20.04 os. I am following this instruction. When I execute sudo dpkg -i srvadmin-hapi_9.5.0_amd64.deb I get ...
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Failed to Install Grub. Fatal Error

So, earlier I had Windows 7 on my laptop. I deleted all the Partitions and I think deleted the efi paritition too(which maybe shouldn't be deleted?). I boot into LM on my Live Disk and automatically ...
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How to install Linux from a UEFI bootable, overwriting an existing Windows installation

I am on an older netbook that cannot handle Windows 10 (nor Windows 11) anymore since the 64 GB fixed flash memory cannot handle the data. It is a Medion Akoya netbook, model number: MD 61900, model: ...
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F2 Key for BIOS menu not working after ubuntu install

I recently installed Ubuntu in place of Windows 10. The Ubuntu installation works fine. But I can't get into the BIOS by pressing the F2 Key (in my case) during boot. The boot menu works just enough ...
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Kali Linux 2021.2 (2009 Macbook Pro) can't access BIOS

I'm trying to boot from a flash drive on my macbook that I put kali on, but I can't get to the BIOS. I've tried the shortcuts that the machine is supposed to use, but nothing works. Any help is ...
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