Questions tagged [uefi]

Questions about the Unified Extensible Firmware Interface (UEFI), the software interface aiming to replace typical BIOSes. This tag may also be used for questions related to UEFI partitions and systems.

5
votes
1answer
1k views

Does using UEFI increase battery life?

I've heard about a better power management when using UEFI instead of BIOS. Is that true? It was about energy consumption being more efficient or something like that. If it is true, has the ...
18
votes
2answers
2k views

The UEFI & SecureBoot impact, how severe?

I'm planning to buy a new laptop in the coming days, and I'm quite impressed with new, cool Ultrabooks. As a long-time GNU/Linux user, I'll of course install a distro of my choice on it. Chances are ...
6
votes
3answers
6k views

Partitioning EFI machine with two SSD disks in mirror

I have two SSD disks, I want to put them in a software mirror RAID. But whatever I do the OpenSuSe installation keeps telling me that due to the partitioning scheme he won't be able to install the ...
3
votes
2answers
711 views

Any chance to fix dual boot not having to turn UEFI on and off to switch OS?

I had a single Linux hard drive with LUKS partitions. Linux was installed in legacy mode, but it worked with UEFI option turned on later. I decided to install a Windows 8 on a second hard drive. So I ...
6
votes
3answers
7k views

How to make UEFI bootable usb disk from bios bootable iso

Suppose you have an iso image that contains a bios bootable partition. You can write this image to a usb disk In linux you could do this for example with dd if=pmagic_2013_02_28.iso of/dev/sdc1 ...
1
vote
1answer
3k views

RHEL Installation issue with UEFI on HP Compaq Desktop

I have bought a new Desktop HP Compaq Elite 8300 SFF. It came with Windows 7 Pro installed. Now I want to install Linux (RHEL) by dual booting it. I have successfully shrinked the partition and ...
13
votes
1answer
65k views

How to create bootable flash for “efi-shell”

Current Intel server chipsets include a built-in "efi-shell" which appears to basically be a simplified 'NIX with a command set suitable for manipulating some nifty UEFI boot options. It is also the ...
2
votes
1answer
2k views

“error setting up gummiboot-efi” on Archboot UEFI install

I recently purchased an Aspire XC600, but am having trouble installing Arch. I haven't installed on UEFI before. I want Arch as the only OS on the disk. I wrote the Archboot x86_64 image to a USB ...
3
votes
4answers
5k views

Dual booting Ubuntu and Windows 8. w8 boots through grub shell, but not from menu

I have a laptop, with installations of Ubuntu 12.10, and Windows 8. Windows 8 was first installed on the system, and Ubuntu was installed afterwards. During the Ubuntu installation, the installer ...
7
votes
2answers
1k views

Determine what program is in my MBR code

I've done a lot of partitioning / dual booting on my Macbook Pro. Right now I have Mac OS X installed along with Ubuntu 12.04, with Grub installed on the Ubuntu partition. I am wondering - what is ...
1
vote
0answers
2k views

Install Arch(Bang) - Create Usb - Uefi

I am pretty new to Linux and want to install ArchBang-Linux, but I fail at creating a bootable USB-Stick. Can someone explain this procedure to me in a little more detail? https://wiki.archlinux.org/...
3
votes
1answer
608 views

Installing the kernel EFI stub loader in kernel 3.2?

Kernel EFI stub loader support was added in kernel 3.3, but I'm stuck on 3.2 running an Ubuntu 12.04 64bit distribution. Is there a way for me to somehow bring that stub loader support into my kernel?
4
votes
5answers
4k views

Can't boot live USB of Linux Mint DE on my UEFI PC

I used the Universal USB Installer application to copy the latest ISO image from Linux Mint DE (64 bits) and install it on my PC, however when I try to reboot it I have the option to choose my ...
2
votes
0answers
283 views

Boot linux bootloader from Mac OSX

I was running Fedora 17 on my computer which was an HP windows based machine. Unfortunately my computer has a malfunctioning motherboard and will no longer turn on. I removed the hard drive and using ...
21
votes
4answers
62k views

How to boot EFI kernel using QEMU (kvm)?

I'm trying to emulate a EFI environment using QEMU (kmv); virtualbox takes 15 minutes to boot in EFI mode using archboot. Using legacy BIOS mode, I can boot using this command: root@citsnmaiko-deb:/...
30
votes
1answer
40k views

Can GRUB2 share the EFI system partition with Windows?

I have an existing Windows 7 GPT installation, which already has a EFI System partition. I am now trying to install a Linux on a separate harddisk, which is also GPT formatted. I did not find any ...
3
votes
1answer
997 views

Problem at booting Windows from GRUB2 menu made by Debian for itself

I've Asus UEFI motherboard with 2 hard disks, (hd0) and (hd1). I managed to make my Debian Wheezy on my second disk bootable using grub-efi and it boots OK. I also have Windows on the first disk, ...
3
votes
1answer
671 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 ...
6
votes
4answers
2k views

Two EFI disks with Grub2

I bought two SSD disks and as usual I though that installing Windows on a completely separate disk would be the easiest solution, but I can't find any tutorials for dual booting with grub2 (efi). All ...
3
votes
1answer
997 views

Can't get past EFI to install RHEL on HP Itanium Server

When I am trying to install RHEL (6.3, 5.8, 4.8) on an HP Integrity Server rx2660 Itanium with 4GB RAM, I keep getting to the same point which is Loading file efi\boot\initrd.img...done After that ...
7
votes
2answers
392 views

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 ...
3
votes
2answers
3k views

Installing Arch Linux with UEFI Boot and GPT Layout

I'm trying to set up a dual UEFI boot Windows/Arch Linux, and have already installed Windows on a GPT layout through UEFI boot. I now want to fresh install Arch Linux using GPT layout as well, and was ...
10
votes
4answers
8k views

What should I do before dual-booting Windows 7 and Debian on EFI?

I'm about to purchase an Asus motherboard with EFI firmware and wanted to prepare myself for installing Windows and Debian once the hardware arrives. I was hoping that someone who has gone down this ...
6
votes
1answer
2k views

EFI boot to Linux on a MacBook Pro

8,3 MacBook Pro 2011, running Ubuntu 11.10 amd64. Here's the situation. Screen backlight and a few other things only work if booting in EFI, so I need to boot Ubuntu in EFI to get things working. ...
1
vote
0answers
4k views

GRUB2 and EFI - File not found?

I'm running Linux on a 8,3 2011 MacBook Pro. It uses EFI/rEFIt to boot. I was able to install GRUB2 EFI support, and it shows up just fine in the rEFIt boot menu. Everything seems to be working there....
3
votes
1answer
1k views

How to configure GRUB to load Windows 7 Install in UEFI mode

I have a Dual-Boot USB I created with Multisystem for booting into PartedMagic, Ubuntu 11.10 & Windows 7 Install. Problem is Windows 7 says it can't install on a GPT partition. Googled, and found ...