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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How do I EFI boot Zenbook Prime UX31A from built-in card reader?

How do I EFI boot Zenbook Prime UX31A from built-in card reader? Ubuntu Live 12.10 64bit has been copied onto an a SD card which I'm trying to boot from. When I power on my Zenbook and press ESC for ...
3
votes
1answer
1k views

Fastest/easiest way to install Ubuntu on Windows 8

I'm sorry if this is asked frequently but I have a problem, the computer I'm going to install Ubuntu is not mine and can only keep it for about 4-5 days, however I need Linux for homework. In the ...
3
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2answers
244 views

Dual-boot Ubuntu 14.04 - Win8.1 (Can't boot Windows when UEFI mode is turned on)

I'm trying to install Ubuntu as a second OS, but I'm stuck at the turn off secure boot step. I've found out that to disable secure boot I need to switch from Legacy mode to UEFI mode. But I can't ...
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votes
2answers
7k views

Dual boot Win 8 / Ubuntu loads only Win

my computer is a Sony Vaio Notebook. I used Ubuntu and Win 8 with dualboot but windows somehow managed to remove the choosing of the OS at startup. I think the bios is EFI and secureboot was disabled ...
3
votes
2answers
5k views

Can't boot Ubuntu or Windows 8 after Ubuntu 64-bit install on Samsung series 7 Windows 8 laptop, error “All boot options are tried.”

I have a Samsung Chronos 7 laptop (NP770Z5E) pre-installed with Windows 8, and I wanted to install Ubuntu 13.04 alongside it, so I can dual boot. Here is what I've done: Updated BIOS to lastest ...
3
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2answers
11k views

Why I need several boot partitions (EFI and bios grub)?

I'm trying to understand how to properly partitioning the disk for future Ubuntu installations. The reason: after trying to install Windows 7 alongside Ubuntu, I enabled "Legacy mode" on my HP ...
3
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2answers
10k views

Cannot boot after BIOS / UEFI reset to defaults

I have a ThinkPad X130e. I installed Ubuntu 12.04 LTS amd64 on it. All worked fine until yesterday. While diagnosing another issue I reset the BIOS / UEFI to defaults. Afterwards Ubuntu did not boot ...
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3answers
5k views

Can the EFI system partition be RAIDed?

I'm setting up a HTPC with Ubuntu 64-bit, using UEFI and RAID with GPT disks. Is it possible for the EFI system partition (partition type 0xEF00) to be part of a RAID1 array using mdadm? I'm hoping ...
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3answers
249 views

Is this how I tell whether or not I have “third party drivers”?

So installing updates on my 14.04 64bit UEFI system this morning, got these: Install: libefivar0:amd64 (0.21-1~14.04.2, automatic), mokutil:amd64 (0.3.0-0ubuntu3~14.04.1, automatic) Upgrade: shim-...
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6answers
18k views

EFI Dual Boot Windows 8.1 and Ubuntu 14.04

I have installed Ubuntu 14.04 LTS in a dual-boot config with Windows 8.1 following the tutorial: http://ubuntuforums.org/showthread.php?t=2227580 (I added an ext4 /home partition.) Even after step ...
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votes
1answer
6k views

Having Trouble adding UEFI entry using efibootmgr

I am trying to rename the boot label of ubuntu. In order to rename the label, I have to delete the entry and create it again. However efibootmgr seem to not recognize the correct partition. Here is ...
3
votes
1answer
4k views

Installing Ubuntu on a GPT HDD

I have changed my system to boot from UEFI instead of BIOS and have installed Windows 7 on my internal SSD which has GPT partition type. I am trying to install Ubuntu 13.04 on my external HDD. My ...
3
votes
1answer
3k views

How can I make Ubuntu the default boot option on a newer laptop (UEFI)?

I have a HP Spectre XT that I installed Ubuntu on. I have turned "Secure Boot" off and turned on "Legacy Support" in the settings. This laptop has UEFI and it always boots to Windows 8 rather than the ...
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votes
4answers
40k views

Making a Bootable USB flash drive which will boot in EFI

I have recently bought a laptop with windows 8 (EFI) installed. I thought I'd be able to handle installing 12.04.2 relatively easily - how wrong could I be? Using a live-usb I made using startup ...
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2answers
5k views

Booting the liveCD/USB in EFI mode fails on Samsung Tablet XE700T1A

My tablet is Samsung Series 7 Slate (XE700T1A-A02FR (French Language)). It operates an Intel Sandy Bridge architecture. The main issue about this tablet is that it ships with an installed Windows 7 in ...
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2answers
28 views

Is it required to have two separate EFI partition when dual booting with Windows?

Since I already have Windows installed, there is already an EFI partition on my disk. I want to install Ubuntu on that same disk. Do I have to create a new EFI partition for Ubuntu, or can the one ...
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2answers
1k views

Unable to boot after install Ubuntu 14.04 LTS on Dell Inspiron 5558 (UEFI)

I have difficulty booting Ubuntu 14.04 LTS on Dell Inspiron 5558. The product originally come with Ubuntu (so I assume that it should run Ubuntu without any complication). I replaced the OEM HDD to ...
3
votes
1answer
4k views

How to run Memtest under 14.04 with UEFI?

I'm experiencing frequent "graying out" of my screen in memory-intensive programs like darktable so I'd like to test my RAM (installed 8GB). My Grub menu does not list Memtest as an option however the ...
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2answers
2k views

“Error: Invalid signature” when configuring dual boot Ubuntu 14.04 and Windows 10

After installing the Windows 10 upgrade on my laptop, it ruined the grub boot manager, and I could only boot in windows 10. I fixed the boot manager using a live cd with the boot-repair tool, but it ...
3
votes
1answer
13k views

How can I remove Ubuntu from the UEFI boot options? [duplicate]

I have a Gigabyte motherboard. GA-Z77X-UD3H to be specific. I recently installed Ubuntu and deleted it again, but it still shows up on the UEFI boot option even if I removed all hard drives connected ...
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4answers
1k views

Can I install Ubuntu without first booting Windows 8?

I want nothing to do with Windows. The only methods I see for installing Ubuntu on a Windows 8 computer involve booting windows and restarting to change settings. However, this requires first ...
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3answers
2k views

Ubuntu 12.10 64 bits not booting on a Dell Inspiron 15z Puissance (French) in UEFI mode

When trying to start Ubuntu from my USB key in UEFI mode (it works in Legacy mode, but I have to keep Windows) on a Dell Inspiron 15z , Grub starts, but when I choose any option, I get a black screen ...
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3answers
18k views

Dual booting Ubuntu 12.04: UEFI and Legacy

I'm trying to dual boot Ubuntu 12.04 (or 12.10) with Windows 8 on a new Sony Vaio, but have run into some problems :) Specifically, my problems seem to come from choosing UEFI or Legacy as the ...
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3answers
15k views

Best partition scheme for ubuntu + windows with EFI and GPT

I am guessing which is the better partition scheme for a system with EFI and GPT. Currently, I have the following scheme: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 465.8G 0 disk ...
3
votes
1answer
52 views

What does it mean to install loader to sdaX?

During linux installation all of us are asked to install bootloader somewhere. For example we have following partitions: sda sda1 sda2 sda5 First sector (512 bytes) is MBR with 446 bytes for ...
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3answers
4k views

Installing Ubuntu on Win 8 Tablet

I know this may seem a little bit duplicated, but my problem is more worse. It's like this: I have got a Win 8 tablet pc, which uses EFI boot option instead of UEFI. But what make it worse is that it ...
3
votes
2answers
8k views

Grub rescue in new installation invalid arch-dependent ELF magic

I installed ubuntu over a W8 installation (my objective was that only ubuntu remains), the installation completed well and ask to reboot, after that, it only gives me a black screen and grub rescue&...
3
votes
2answers
25k views

UEFI Dual-Boot - Ubuntu 12.04.3 + Windows 8.1 (One GPT HDD)

UEFI Dual-Boot - Ubuntu 12.04.3 + Windows 8.1 (One GPT HDD) Hello, I'm having trouble setting up a dual-boot (Ubuntu 12.04 LTS and Windows 8.1) in my ASUS K55VM laptop's hard drive disk (500 GB). I ...
3
votes
1answer
188 views

Ubuntu Dual Boot windows 8

I installed ubuntu 13.xxxx the latest version for desktop. I did so as a dual boot with uefi and secureboot enabled. Now I can boot into ubuntu just fine. However, I can't boot to windows 8. I have ...
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5answers
16k views

How to tell if my Laptop has UEFI [closed]

New user here and I would like to know how do I tell if my Toshiba Satellite Laptop A665-S5173 with Windows 7 Home Premium, 64-bit Intel Core i5 1st Generation processor with 4GB of RAM has this UEFI ...
3
votes
2answers
17k views

Grub EFI entries and Boot-Repair

I installed Ubuntu 12.10 on a Dell laptop with OEM Windows 8 on it. At first, my Grub menu didn't show at all, so I changed the /etc/default/grub file commenting the line GRUB_HIDDEN_TIMEOUT=0. After ...
3
votes
1answer
4k views

Is it safe to install Ubuntu 64 Bit 12.10 in EFI mode on Samsung series 7 WIndows 8 laptop?

I have been reading about the issue of Samsung laptops bricking when attempted booting from live USB. I have Samsung Series 7 NP700Z5C (-S02UB to be specific) laptop. It came with Windows 8 preloaded. ...
3
votes
1answer
28k views

“/ubuntu/winboot/wubildr.mbr” error

I am having some problems with my new laptop ASUS N76VM. I have read up on the problem for the past couple of days, as it seem to be UEFI related. First, I tried to use the WUBI installer and since ...
3
votes
1answer
4k views

How to install Kubuntu 12.04 amd64 on an Asus N56V notebook

SOLVED I'm trying to install Kubuntu alogng with the preinstalled Windows 7. I boot from CD Create three partititons: / (ext4), swap and a 100MB reserved bios All installs correctly, but I'm not ...
3
votes
5answers
13k views

Installing Ubuntu 12.04 on EFI system

Fellas, need help. Trying to install Ubuntu 12.04 on laptop to dual boot alongside Win7. I have UEFI and GPT partitioning scheme. It has optional Legacy boot mode though. I can boot from Ubuntu USB/CD ...
3
votes
2answers
3k views

Dual boot EFI error: “invalid arch independent ELF magic”

After installing Ubuntu 11.10 on a pc which already has Windows 7 I get this error: error: invalid arch independent ELF magic. grub rescue> So I used Supergrub boot disk to get into Ubuntu. And ...
3
votes
1answer
8k views

Can I install in UEFI mode with the alternate installer?

I'm wondering if it's possible to install Ubuntu 11.04 UEFI mode with the alternate installer. I've read that only grub-efi is needed to boot in UEFI mode. How do I install that?
3
votes
1answer
186 views

How to dual boot Ubuntu with Windows 10?

I've tried to install Ubuntu twice, after the first time I installed it then I restarted my laptop (as instructed) and it fails to boot Ubuntu saying Ubuntu is on low graphics mode giving me various ...
3
votes
1answer
524 views

GParted does not recognize SATA M2

I bought myself a new Laptop, the ASUS GL771JW with 250 GB M2 SSD drive and a 1 TB HDD. Now I'd like to install Ubuntu 15.10 on it, but I get errors. I downloaded the amd64 Ubuntu ISO and put it on ...
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2answers
4k views

Failed Ubuntu 15.10 installation on UEFI system, how to report this bug [duplicate]

Yesterday I had to try installation of new Ubuntu 15.10 more than 5 times. I have noticed methods that give me unbootable system on reboot after installation. It says it cannot detect UEFI partition ...
3
votes
2answers
680 views

/casper/vmlinuz.efi: not found for ubuntu 14.04.2 LTS

/casper/vmlinuz.efi: not found is the error that is shown when i tried to start ubuntu for using vmware by downloading an .iso file for Ubuntu 14.04.2 LTS. What should I do now ? Also , when I ...
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2answers
2k views

Unable to install Ubuntu 14 LTS (64bit) on Lenovo Ideapad S205

My Lenovo Idepad S205 seems to be in a worse situation than in the question here. Unfortunately the answer given there does not solve the problem. The laptop just boot cycles. It will boot my USB ...
3
votes
1answer
1k views

How do I create a live USB installer for UEFI/EFI systems that reads and saves persistence changes?

I have a 16 GB USB stick which runs a live boot of Ubuntu 14.10 with antivirus software installed which (obviously) needs to be kept up to date as I use it to boot and clean infected Windows machines. ...
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votes
4answers
1k views

Xubuntu / Cannot boot unless navigating to EFI file in BIOS

I have a boot problem on my laptop (HP ProBook 450 G2) since I tried to replace the pre-installed Windows 7 by Xubuntu 14.04. The BIOS uses the UEFI boot mode (but trying the "Legacy" boot mode does ...
3
votes
2answers
607 views

Grub Setup for dual Ubuntu under EFI

I have installed to versions of Ubuntu, one up-to-date Xubuntu and a 12.04.5LTS Ubuntu. I first installed Xubuntu and later Ubuntu. Since the 12.04 would not write a correct grub-conf on install (I ...
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2answers
2k views

ElanTech TouchPad NOT detected as PS/2 in EXO NIFTY 7385

My touchpad is not recognized (is not present in the xinput list) as a PS/2 device or a USB device after installing Ubuntu 14.04. My computer is an Ultrabook that I bought with Windows 8, the touchpad ...
3
votes
2answers
1k views

Boot problems after uninstalling Ubuntu

I have a Sony Vaio PC and after uninstalling Ubuntu from my laptop I went into a problem that I can't fix. I get a error message that says: SECURE BOOT FAILED! Your VAIO has detected an invalid ...
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4answers
23k views

Ubuntu 12.04 — grub-efi-amd64-signed failed to install into /target/

I have HP Pavillion 14-n009tu laptop (i-5, 4GB) with Windows-8 OS installed on it. I am trying to install ubuntu 12.04 as a dual boot OS on Windows8. I have disabled fast boot and secure boot options ...
3
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2answers
25k views

Impossible installing Ubuntu 13.04 in UEFI mode with Windows 8 preinstalled

I know this is a dejavu but let me please explain my problem. When booting 13.04 installation media EFI mode get to a black screen with Grub version 2.00-l3ubuntu3 version appears after selecting "...
3
votes
1answer
3k views

How can I boot Windows 8 and Ubuntu 13.04 on a PC with an EFI bootloader? [duplicate]

I just bought a Lenovo ideaPad Z400. I installed the ubuntu 13.04 without problem. Now, I cna't boot the windows 8. Eaither in secure boot mode enabled or disabled. I am frustrated. this is my boot-...