Questions about the Unified Extensible Firmware Interface that finally replaced the BIOS on newer desktops and laptops with the release of Windows 8. UEFI is independent from CPU architectures and supports booting via UEFI with and without secure boot enabled as well as legacy booting via CSM.

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393
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11answers
1.3m views

Installing Ubuntu on a Pre-Installed Windows with UEFI

I'm absolutely new to Linux. I have been using Windows for all my life, but I have read about Ubuntu (and Linux in general) and I think I'll like it, so I wanted to know how to install Ubuntu on my PC ...
49
votes
4answers
41k views

How can I tell if my system was booted as EFI/UEFI or BIOS?

How do I determine whether a particular running Ubuntu system was booted using EFI/UEFI, or BIOS?
44
votes
3answers
156k views

How to create UEFI-only bootable USB live media?

Having live media that can boot both ways can be a problem when installing Ubuntu onto currently available Windows 8 computers. In other words the key advantage to creating UEFI-only bootable USB ...
33
votes
3answers
129k views

How can I dual-boot Windows 10 and Ubuntu on a UEFI HP notebook?

I've got an HP Pavilion Touchsmart notebook that came with Windows 8. I've upgraded to 8.1, and now I want to dual-boot an Ubuntu distribution with Windows 10. When dual-booting with Windows 8.1, the ...
33
votes
3answers
102k views

How can I change/convert a Ubuntu MBR drive to a GPT, and make Ubuntu boot from EFI?

I recently have upgraded my PC, my new Motherboard (ASUS M5A99X EVO) uses UEFi instead of the regular MBR option. I have a Ubuntu 11.10 installation that I did when I had my previous hardware (MSI MS ...
27
votes
4answers
72k views

Is it possible to boot Ubuntu using the Windows bootloader?

As noted by many people, Windows 8's UEFI requirements might will won't get in the way of installing Linux (or whatever), as the replacement bootloader will also need to be signed somehow. Some ...
27
votes
7answers
59k views

Windows 8 removes Grub as default boot manager

I have a Sony VAIO S series with Windows 8 preinstalled, and I installed Ubuntu 12.10 on a new partition. When the PC boots Grub is display, and I can choose between Windows 8 (didn't worked at the ...
21
votes
7answers
87k views

Grub does not show a Windows 8 option after dual boot

So, I've successfully dual-booted my Windows 8 machine with Ubuntu 12.04 . However, I still don't have a convenient method of choosing what OS to load at boot time. After installing Ubuntu, my ...
19
votes
1answer
63k views

How do I remove “Ubuntu” in the bios boot menu? (UEFI)

See this ubuntu appears in BIOS menu I have this on my Lenovo s205 too. Is there some way to remove "ubuntu" from the menu? I don't even have it installed anymore.
18
votes
4answers
42k views

How to understand Ubuntu UEFI Secure Boot install?

Now that Secure Boot is supported, what special instructions does one have to follow to install Ubuntu on a UEFI Secure Boot enabled PC shipped with Windows 8? As I understand, Ubuntu >= 12.04.2 ...
16
votes
2answers
74k views

32-Bit UEFI Boot Support

I recently purchased a Dell Venue 8 Pro. I have read online about what it needs in order to boot into Ubuntu or any other Linux distro. From what I have gathered, what really needs to happen is ...
15
votes
1answer
19k views

Which commands to convert a Ubuntu BIOS install to EFI/UEFI without boot-repair on single boot hardware?

Accidental BIOS mode install I have Intel 64-bit hardware with UEFI setup utility. Ubuntu 14.04.1 LTS was installed as the only operating system on the only drive attached. Accidentally Ubuntu was ...
14
votes
7answers
24k views

VirtualBox boots only in UEFI Interactive shell

I installed Ubuntu 14.10 in VirtualBox with UEFI. But now I have rebootet this OS and now it boots into a UEFI Interactive Shell v2.0. How can I boot normaly into Grub again? I hope you can help me, ...
14
votes
3answers
106k views

Grub not showing on startup for Windows 8.1 Ubuntu 13.10 Dual boot

Ok, so I'm such a newbie to Ubuntu and I bought a Windows 8 pre-installed laptop last month. I updated to Windows 8.1 and then I thought about installing Ubuntu as a dual boot so I could mess around ...
13
votes
9answers
138k views

How to boot Ubuntu from EFI/UEFI?

I installed Ubuntu 11.10 on a newly bought Lenovo ThinkCentre Edge 71 (model: 1577-G3G) with EFI boot enabled. I opted for the Use Entire Disk option. Even though the installation process went without ...
12
votes
3answers
23k views

Error: partition table requires a separate partition for boot loader code (EFI issue)

The Issue I'm trying to install Ubuntu 12.04 (64-bit, Mac alternate) on my 13" MacBook Pro (model 7,1. Mid-2010). The MacBook Pro is running OSX 10.8.3 and I'm trying to make it dual-bootable (i.e., ...
11
votes
2answers
3k views

Why does the first partition start at sector 34 when I choose “Guided - Use entire disk” during install?

After choosing "Guided - Use entire disk" during installation of Ubunsut Server 12.04 I find that the first partition starts on sector 34. Why that specific sector and not the first one? (parted) ...
11
votes
2answers
10k views

ubuntu appears in BIOS menu (UEFI)

I've just installed and uninstalled ubuntn and win7 on my laptop for several times, and this happened: see the pictures below. The first one is about BIOS: The second is what I got after ...
10
votes
5answers
24k views

Sony VAIO with Insyde H2O EFI bios will not boot into GRUB EFI

I bought a new Sony Vaio S series laptop. It uses Insyde H2O BIOS EFI, and trying to install Linux on it is driving me crazy. root@kubuntu:~# parted /dev/sda print Model: ATA Hitachi HTS72756 (scsi) ...
10
votes
3answers
13k views

Howto run Ubuntu with UEFI and Intel Smart Response Technology

This question has NOT been answered by the following due to them saying to permanently disabling these features Installing Ubuntu on a Pre-Installed UEFI Supported Windows 8 system Install ubuntu on ...
10
votes
1answer
4k views

Cannot detect Windows 8 from Ubuntu 12.04 Live USB installation on Toshiba qosmio x870

From other questions raised, I read that if Ubuntu Live USB boots in UEFI mode then it should detect Windows 8 during installation. During installation, I only see two options, Erase disk and install ...
10
votes
0answers
19k views

Is wubi for Windows 8? [duplicate]

Possible Duplicate: How to boot WUBI installed Ubuntu within Windows 8? Installing Ubuntu on a Pre-Installed Windows 8 system My Dell laptop shipped with Windows 8. I installed Ubuntu ...
9
votes
2answers
52k views

virtualbox machine boots to efi shell

I recently transferred a virtualbox machine from my laptop to my recently reinstalled desktop. The image works fine on my laptop, but when I try to boot it on my new machine, I get dumped to an "EFI ...
9
votes
2answers
19k views

''EFI boot partition'' and ''biosgrub'' partition

Why do I need these? I have installed Ubuntu under a non UEFI (master boot record) and have installed Ubuntu with no 'biosgrub' and it works fine, whereas other times I am asked to make a 'biosgrub' ...
9
votes
5answers
37k views

Configure Dual Boot, Windows 7 and Ubuntu 12.04 with or without EFI

I have just installed Ubuntu 12.04 on a laptop with Windows 7 but I don't get to boot from Ubuntu. First, during the installation I made these partitions (may be too many): /dev/sda1 FAT32 SYSTEM ...
9
votes
1answer
13k views

How do I create an EFI-bootable ISO of a customized version of Ubuntu?

I have created an own Ubuntu distribution that I want to boot (from a USB) on my MAC. When using the standard 64bit-Ubuntu-iso from the Ubuntu website, it boots. However, when doing the exact same ...
8
votes
1answer
4k views

What is the advantage of a signed kernel?

I was looking through APT packages for Quantal and I found one called linux-signed-image-generic, which only says that it's "Signed with the Ubuntu EFI key." The kernel package that it currently ...
8
votes
3answers
7k views

How do I create a multiboot environment using LVM for your *buntu operating systems on a GPT formatted system drive, in a UEFI based system?

My reason for using LVM is that I reinstall, upgrade and generally mess around with my OS installs so much that I have found that LVM gives me fantastic flexibility in moving, expanding, cloning and ...
8
votes
5answers
20k views

Which iso image do I need to install Ubuntu 12.04 on a Macbook Pro so that it boots using (U)EFI?

Unlike with earlier releases, the website is unclear on giving a straight recommendation for installing ubuntu on a mac: http://cdimage.ubuntu.com/releases/12.04/release/ I've read several times, ...
7
votes
4answers
51k views

12.04.2 Failed to install grub-efi to /target/

I have a Lenovo u410 ultrabook. It's sata scheme consists of a 30gb SSD and a 1tb hdd in a raid0 with intel rapid start technology. I removed IRST and disabled the raid0. I want to install ubuntu on ...
7
votes
3answers
12k views

How to, finally, get Ubuntu to boot on a mac from external USB storage?

I wish to run Ubuntu on my iMac from external USB storage, either an external disk or a flash drive. I can easily create a bootable USB stick and use that to install Ubuntu 14.04 onto a properly ...
7
votes
3answers
21k views

How to install Ubuntu server with UEFI and RAID1 + LVM

I used to install my servers with LVM over software RAID1, and grub install on the MBR of both drives. Now I have an UEFI server, and the compatibility (BIOS) mode does not seem to work. So I went ...
7
votes
3answers
35k views

How do I install Ubuntu alongside UEFI enabled Windows 8? [duplicate]

I recently (about a month ago) bought a Dell XPS 8500 Desktop with UEFI enabled Windows 8 Pro pre-installed. I am trying to install Ubuntu 13.04 64-bit dualboot with Windows on this computer. I don't ...
7
votes
6answers
16k views

Dual-boot Ubuntu 12.10 on UEFI along Windows 8 (GRUB - error: can't find command drivemap)

Hello after a successfull installation of Ubuntu 12.10 amd64, I am now unable to boot Windows 8. Here are my actions: Made room (15 GB) for Ubuntu from Windows 8 Computer Managment Boot Ubuntu ...
7
votes
1answer
5k views

How to install Ubuntu 14.04 64-bit with a dual-boot RAID 1 partition on an UEFI/GPT system?

I have a computer with dual SSDs and Win (7) pre-installed on another disk. The pre-installation uses (U)EFI/GPT boot. I want to install Ubuntu 14.04 64-bit desktop on a RAID1 root partition on my ...
7
votes
3answers
11k views

Proprietary NVidia drivers with EFI on Mac, to prevent overheating

I have a dual-boot Mac OS X 10.8 and Kubuntu 12.10 64x on my white MacBook from mid-2010 installed. (Model identifier: MacBook7,1 . I have upgraded my RAM from 2GB to 8GB, if that matters.) I have ...
7
votes
3answers
33k views

Dual boot UEFI Windows 7 and Ubuntu 12.04 (both 64 bits). W7 entry doesn't appear in GRUB

After trying to install both OS during 2 days, I'm confused and getting mad... I have SSD 128 GB and HDD 500 GB both empty. My laptop is Asus K55VM. BIOS support UEFI. What I have done: Install new ...
7
votes
4answers
45k views

How to fix dual-booting Windows 8 and Ubuntu 14.04 on a Sony Vaio?

I am currently trying to install Ubuntu 14.04 on a Sony Vaio that came pre-installed with Windows 8 in (I understand) UEFI mode. And I am experiencing the dual-boot hell. I already tried most of the ...
7
votes
2answers
5k views

Where is the memtest option on the 12.04 64-bit live CD?

I'm looking for the memtest option on the 64-bit version of the Ubuntu 12.04 live CD, but the only options I have are "Try Ubuntu without installing", "Install Ubuntu", and "Check disc for defects". ...
7
votes
6answers
30k views

How To safely uninstall Ubuntu and restore Windows 8?

How to uninstall the Grub and restore the Windows 8 system with secure boot and UEFI?
7
votes
4answers
7k views

Windows 8 changes GRUB2 in every boot!

I've installed Windows 8 and Ubuntu 12.10 both UEFI style (win8 first then ubuntu). GRUB2 shows me both Ubuntu and Win8 entries. If I boot into Ubuntu is fine. I could reboot anytime I will see ...
6
votes
3answers
2k views

How to fix Secure Boot error “Image failed to verify with *ACCESS DENIED*” on startup?

When I started up my machine this morning (I have Secure Boot and UEFI only enabled) I got this error (sorry for low quality image): What does it mean by Image failed to verify with *ACCESS ...
6
votes
1answer
99k views

How to enter BIOS on UEFI capable Lenovo Z50? (Novo button) [closed]

I have a Lenovo Z50 machine that came with Windows 8.1 pre-installed. I booted into Ubuntu 14.10 64-bit from a DVD using the "Change Advanced Startup Options" (or similar) option from within Windows ...
6
votes
2answers
12k views

Legacy vs UEFI Help

Are there any drawbacks to installing Ubuntu 13.10 (and soon 14.04) in Legacy BIOS instead of UEFI? I have installed 13.10 64bit in Legacy by mistake and was just wondering if it would hurt anything ...
6
votes
2answers
4k views

How to boot load the kernel using EFI stub (efistub) loader?

I have Ubuntu 14.04 running in UEFI mode as only operating system, no dual-boot here. The kernel version is 3.13.0-24-generic. There is an EFI partition. In this case the EFI partition is not at the ...
6
votes
3answers
32k views

How do I Dual Boot Windows 8 UEFI and Ubuntu 12.10? [duplicate]

I have got a new Samsung Series 7 laptop with Windows 8 where I tried to install Ubuntu. It is a 64-Bit system which uses UEFI and has "Secure Boot" switched on in the BIOS by default. After I ...
6
votes
3answers
12k views

How to dual-boot Ubuntu + Windows 8 on a Samsung Series 9 laptop?

I have a Samsung Np900X4C which came with Windows 8 installed. My goal is to have a dual-boot setup. I followed pretty much the answer at Samsung series 9 np900x4c-a03us Dual boot windows 7, namely: ...
6
votes
2answers
2k views

What is UEFI and Secure Boot? How do they affect Ubuntu?

Discussions and reports about UEFI and Secure Boot has cropped up in many Linux circles, but can anyone summarize it's impacts on Ubuntu and how it affects the general users? I know that UEFI and ...
6
votes
5answers
29k views

How to show GRUB after install Ubuntu over Windows 8?

I installed Windows 8 and after that I installed Ubuntu. This are my partition now: 70Gb --> Windows 8 50Gb --> Ubuntu 12.10 100Mb --> UEFI 300Mb --> Recovery I installed the GRUB on /dev/sda. ...
6
votes
2answers
4k views

Install ubuntu on windows 8 with intel smart response

I have a dell inspiron 15z (ultrabook) with two drives, one HDD (500 Go) and one SSD (32 Go) managed by a kind of raid 0 array called intel smart response, and Windows 8 already installed. Dell ...