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

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Why is USB not working in Linux when it works in UEFI/BIOS?

For background I have just built a new machine with modern hardware including: AMD FX-8350 Gigabyte GA-990FXA-UD3 motherboard 16GB RAM NVidia GTX 650 Ti Kingston SSD Given that, I tried to install ...
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4answers
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How to dump BIOS data to a file

I want to dump the BIOS data of my laptop to a file. The only solution I found is the following command: dd if=/dev/mem bs=X skip=Y count=1 X and Y are different in suggested solutions by different ...
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8answers
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How to flash firmware under Linux in practice?

Well, I am feeling too old for jumping through several burning hoops to upgrade several firmwares via the usual vendor-specific way: Download some DOS tools, waste some time creating a (Free-)DOS boot ...
8
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1answer
611 views

Does Linux still have to reside within the first XX cylinders of a HDD?

It's been a while since I last bothered with partitioning my hard drive, but now it's time again and I remember last time I did this there was a requirement to put the root partition (or only GRUB?) ...
8
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1answer
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booting qemu/kvm directly from a file system

Having used Xen and its pygrub for a while, I'm now trying to do something similar with KVM/qemu. Basically, I have a LVM logical volume (though that could as well be a file) that contains the root ...
7
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2answers
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Is there a command or method (other than RTFM) to determine if a system has a UEFI BIOS?

My inspiration for asking this is this other question on Ask Ubuntu. One reason I am asking is that I am just curious. I would like to know more about this for whatever value it might have in the ...
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2answers
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Booting from install disk, no USB keyboard

I'm trying to install Arch Linux on a new system with a Gigabyte GA-Z87N-WIFI board. Although I can use the USB keyboard (and mouse) in the BIOS, the keyboard doesn't seem to work at all once I boot ...
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3answers
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How to make grub work again after drive reassignment?

My config: opensuse 11.4, boot partition at pendrive and hard drives with partitions sda1, sda2, sdb1. Today I changed chassis for my computer, and by mistake I attached second drive to SATA 3 ...
5
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2answers
340 views

What software or drivers do I need to shut off to use `flashrom`?

I have backed myself into a corner with a new system I'm building. The current BIOS is completely broken (it locks up after drawing half the screen if you enter settings during POST, locks up if any ...
4
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2answers
2k views

How to install GNU/Linux on a Windows PC without the BIOS password?

I want to install a GNU/Linux based operating system on a computer with Windows preinstalled, but unfortunately, the BIOS is set to only boot from the harddisk, and there is no way to boot from ...
4
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1answer
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How much speed difference for a tweaked bios versus uefi boot? [closed]

EFI can be faster, but that's not certain. The biggest speed difference is in hardware initialization early in the process. On my systems, this is a fraction of the total boot time, so a ...
4
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1answer
252 views

updating BIOS without MS Windows (or a floppy drive)

I'm running Kubuntu 12.04. I need to update my motherboard BIOS. The Arch Linux Wiki says, "By far the easiest way to make a bootable FreeDOS USB Stick is using unetbootin." So I did that. Using ...
4
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2answers
128 views

Why can GRUB2 only remember 4 bits?

For fun and laziness, I've got 20 entries in my GRUB2 menu. To get to the bottom one quickly, I tap down-arrow a couple of times during the GRUB loading screen. I can press the key 15 times (+/- 1, ...
3
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2answers
158 views

Lost everything after using install-mbr

I was dual booting Windows 8 and BackTrack5 but I erased the MBR while using easyBCD. So I tried this… sudo install-mbr -i n -p D -t 0 /dev/sda1 /dev/sda1 was the primary partition in my ...
3
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1answer
389 views

Can I read settings in BIOS without restarting Ubuntu

Can I read my bios settings under Ubuntu without restarting? For example, I'd like to check the sleep settings in my BIOS, S3 (suspend) or S4 (hibernate). As of now, I can't hibernate, and am ...
3
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1answer
131 views

How does the grub efi loader find the correct grub.cfg and boot directory?

As I understand it, the uefi bios loads grub.efi from the efi partition. This now loads a bunch of grub modules and the configuration file from the /boot directory. But how does grub find the correct ...
3
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1answer
309 views

Libre Coreboot payloads?

If one wishes to build an x86 server or workstation that is as de-blobbed and libre as possible, then the best one can do at this time is to use one of the fully free GNU/Linux distributions ...
3
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1answer
170 views

How do I boot my computer from a Live-DVD from the terminal?

I'm not an expert on computers in general or Linux in particular, so if I'm vague on something please let me know and I'll try to elaborate. I have an old computer running Red Hat 5.0. It had a ...
3
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1answer
564 views

How can I tell if I have a bug with my kernel or with my UEFI firmware?

I have a dz77ga-70k motherboard with version 0049 of the Intel firmware on it. Linux and elilo will not boot in uefi mode. The symptoms are that when I run bzImage.efi initrd=initrd.img ro debug ...
3
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2answers
96 views

How can you configure a system to be bootable from most modern systems?

How can a Linux system be installed on a portable storage medium so that both BIOS systems (e.g. a ThinkPad) and EFI systems (e.g. a Mac Mini) can boot to it? The reason I ask is because I tried ...
2
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2answers
387 views

How does a BIOS password work?

I have created a BIOS password. I use the Dvorak keyboard layout. When I switch my keyboard layout to Qwerty and restart, and then type password in with the different layout, there is no change. ...
2
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1answer
765 views

Restart does not shutdown first on Debian Squeeze

I installed Debian Squeeze from the live DVD. Going to System->Shutdown->Restart does not shutdown the computer in the usual way where the BIOS screen is seen before login. Instead it simply restarts ...
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2answers
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Does BIOS read directly the bootloader or load it into RAM?

I'm trying to understand the very first steps of the boot process. The CPU read the BIOS It reads a fixed address instruction It will jump to the first BIOS instructions address It will execute ...
2
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1answer
138 views

Can one make a bootable device with several distros of Linux?

I think this question explains itself. But here are some more details anyway: Many Linux distributions have "live USB's" which one can use to try and install that distro. However, that pen must often ...
2
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1answer
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How to correctly configure Debian watchdog daemon for BIOS Watch Dog?

Supermicro main boards contain a BIOS feature named "Watch Dog Function". Having Debian 6.0.6 with kernel "Linux debian 2.6.32-5-amd64 #1 SMP" we did: Change BIOS "Watch Dog Function" from Disabled ...
2
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1answer
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How to check if VT-X is enabled in BIOS?

How to check if VT-X is enabled in BIOS? I have vmx in CPU flags, and no access to the BIOS. (I need to install a KVM VM on RedHat Enterprise Linux 6.1).
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2answers
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How to enable Virtualization AMD-V Aspire one AO725 from BIOS or otherwise

I'm try to use the virtualbox to visualizer the system of 64bits but the error that get is: La aceleración VT-x/AMD-V ha sido habilitada, pero no es funcional. Su sistema invitado de 64-bit fallára ...
2
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2answers
1k views

Laptop boots directly to Ubuntu, can't access BIOS or Boot menu anymore

I'm running Laptop with single OS: UbuntuMATE 15.04 Beta1 64bit on Toshiba laptop Core i3. After burning "Elementary OS" on a live USB drive using UNetbootin, what happened is: -After reboot, laptop ...
2
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1answer
878 views

motherboard beep

I need help. I am using a Debian machine, ARK-3360F, and I need to make it beep like it does when it starts-up. Unfortunately, there is not any other speaker than this on the machine, so the below ...
2
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1answer
611 views

Coreboot + QEMU Tutorial Request (Google has failed)

Can anyone point me in the direction of an end-to-end idiot-proof coreboot+qemu tutorial? I'm having trouble understanding how qemu is set up to emulate different hardware (also having trouble ...
2
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0answers
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How to escape a BIOS failure?

While attempting to install deepin linux onto my new netbook, I worked myself into a corner that I do not know how to escape. 1) I loaded the deepin installer onto my USB stick as per instructions, ...
2
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2answers
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“USB HDD” option replaced by “ubuntu” in BIOS, now cannot use USB boot media

So, being foolish old me, I tried to use os-uninstaller to remove my Windows installation and make way for Arch Linux. Unfortunately, now nothing on this computer boots, and I cannot even boot from a ...
2
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1answer
771 views

Booting from usb fails as I try to install elementary OS on my PC

I'm trying to install Elementary OS Luna on my PC. The problem is that every time I try to boot from my usb, on which I've got the OS installation files, it fails. First I press F12 to get to the ...
2
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0answers
654 views

How to configure FreeBSD to run headless without hitting high interrupt rates?

When running headless (without monitor, keyboard, mouse attached) FreeBSD versions 8.2, 8.3, 9.0 and NetBSD version 5.0 has known issues (FreeBSD PR 156596, NetBSD 46596) to generate extremely high ...
2
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1answer
240 views

Unable to boot Linux / Windows as there are no boot entries in the BIOS

I have Asus N56D laptop with Windows 8 pre-installed in EFI mode. I installed Linux Mint 15 dual boot and got it working with the Boot-Repair utility. Everything was going fine until I decided to ...
2
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1answer
2k views

BIOS don't recognize my bootable USB [duplicate]

I'm currently using Ubuntu 13.04 on my ASUS F201E laptop. I'm trying to install I want to install Linux Mint 13 "Maya" - MATE (32-bit) because it's meant to be more compatible with my hardware. I've ...
2
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1answer
3k views

How to get system configuration information without dmidecode

In order to collect some system configuration information, I have been using dmidecode and the related tool lshw to find the information. This works great on most machines, but I have recently got ...
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2answers
99 views

Optimal BIOS CPU power config for performant Hadoop?

I'm in the process of setting up a Hadoop cluster and have so far been unable to find a good answer for how to configure CPU power in the BIOS for Linux. My BIOS give a variety of options with ...
1
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2answers
1k views

What is the Execute Disable bit?

I read an article about the Execute Disable Bit (EDB) on x86 CPUs. This is more widely known as the NX bit; Intel also calls it XD. So Windows XP supports this hardware feature. Yay! But how do I ...
1
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1answer
348 views

Making a real universal bootable Arch pen drive

I've followed this article, and been able to get a fully working 32-bit installation on a Kingston DataTraveler 8GB pen drive, with a BIOS boot partition, and a home/root ext4 file system without ...
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2answers
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How to turn off DELL BIOS beeping through Ubuntu?

I removed my LCD with Inverter, because it was broken. I'm using a Inspiron 4050 with a HDMI or VGA connected at TV, but the BIOS beeps(8times) continuos for ever and ever. There is a way to control ...
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2answers
1k views

Boot Linux from UEFI BIOS

I'm porting UEFI BIOS. I'd like to download an Linux image (bzImage) to system memory by TFTP in my UEFI shell, and then boot the OS directly. I know we generally need another bootloader to do that. ...
1
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1answer
61 views

“grub” entry in BIOS after installing ElementaryOS

After installing ElementaryOS, I get the entry (to boot) named "grub". None named ElementaryOS as expected. Problem is, when going into the grub entry, I get its console (more or less like this). Am ...
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1answer
389 views

Why is windows launching instead of grub. Bad bios settings? Wrong boot loader location?

I am attempting to dual boot Linux Mint 17.2 (Cinnamon, 64 bit) and Windows 8.1 on my Acer E 15 (model # E5-573-55W1). I have successfully installed Mint, but I can't get grub to start in a ...
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1answer
703 views

Use some EFI loader to boot MBR

For compatibility reasons I had to install Debian via BIOS emulation rather than native EFI. As the EFI internal bootloader takes ages to look for bootable legacy disks I'd like to change the ...
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1answer
1k views

How do I install openSUSE 12.1 from an external hard disk?

For some reason, my laptop (HP ProBook 5320m) refuses to boot when I install the ISO images for openSUSE 12.1 on an USB stick (the stick starts to blink and then the internal fan goes into overdrive ...
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0answers
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How to enable IOMMU on Gigabyte 990FXA-UD5 R5

I've enabled svm and iommu in the bios, but I get "not available" from dmesg: root@xen:~# dmesg |grep -i iommu [ 0.000000] Command line: placeholder root=UUID=0b6a99ef-b56b-4d71-9f63-4895d0276674 ...
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0answers
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“BGRT Invalid Status Error 0 Expected 1” followed by permanent loading screen

After I shut down many programs at once using Alt+F4 in my Linux (Manjaro), my computer froze and I had to force shut it down. Upon rebooting, it gives me the error "BGRT Invalid Status Error 0 ...
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0answers
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How to rename boot options with dual boot

I have Ubuntu and Windows 10 installed side-by-side, and the BIOS tool that's installed on the computer is called "Aptio Setup Utility". How can I rename the boot options, not just for the OS I'm ...
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Allowing GRUB to access network in BIOS mode

I want grub to fetch some configuration via tftp/http. Using efi I can do insmod efinet and net_ls_cards will list my network cards which I can configure and use. Using PXE in BIOS/legacy mode ...