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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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 ...
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1answer
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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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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
9k 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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1answer
135 views

Dual boot: Grub Menu no longer showing

Approximately a month ago my laptop stopped showing the Grub menu on startup. I had used this guide http://ubuntuforums.org/showthread.php?t=2227580 to setup my dual boot. bcdedit /set "{bootmgr}" ...
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4answers
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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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1answer
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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
997 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
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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 ...
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3answers
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UEFI hardware and dual booting with windows

I've been struggling for 3 days trying to dual boot Ubuntu 11.10 and Windows 7. I want to use an SSD for my Ubuntu installation and an hdd for Windows. I realized that I have to install windows first ...
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1answer
50 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
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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 ...
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2answers
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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 ...
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2answers
24k 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 ...
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1answer
187 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
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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 ...
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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 ...
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1answer
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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. ...
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2answers
504 views

Where can I find reliable review of Ubuntu's performance on a laptop (Lenovo z580)

Sorry to ask a hardware related question. Hope it's relevant enough to Ubuntu users in general not to get instantly down-voted and marked as a replica as a related hardware question did. I hope it's ...
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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 ...
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1answer
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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 ...
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5answers
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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 ...
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2answers
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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 ...
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1answer
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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?
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1answer
347 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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1answer
133 views

Changed the UEFI motherboard on a dell laptop, now it says no OS detected

My laptop was running the latest Ubuntu, because of a minor issue, the motherboard was replaced. The new motherboard has the same specifications as old. But after replacing, the OS is not detected. ...
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2answers
558 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
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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 ...
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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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4answers
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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 ...
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2answers
481 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
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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 ...
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2answers
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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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2answers
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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 ...
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1answer
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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 ...
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2answers
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Ubuntu 12.04 & UEFI mode

On a new Dell XPS 8500, I tried to install a fresh xubuntu 12.04.2 with EFI enabled but it did not work: the 'grub-efi-amd64-signed' package failed to install in /target/ As specified in ...
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1answer
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Module 'efivars' does not exist

Several tutorials and how-to's on ask ubuntu re uefi booting refer to efibootmgr as being capable of controlling a uefi boot. In all cases I have seen the tutorial asks you to modprobe efivars How ...
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1answer
56 views

Ubuntu on 32bit UEFI(only) based tablet pc

I've created a bootable USB of Ubuntu 16.04 64bit with Rufus, setting the drive to be a GPT for UEFI. Then I booted my tablet pc and I ran the UEFI BIOS, from which I turned secure boot off. I then ...
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1answer
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Using efibootmgr to make drive a permanent boot priority without re-ordering the whole boot order

I'm trying to write a script that runs at initramfs that uses efibootmgr to permanently set the highest boot priority without having to re-assign the boot order. efibootmgr -n 000A for example is ...
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2answers
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Repair Windows Boot Loader after installing Ubuntu on MacBook Pro

I installed Ubuntu 14.04.2 LTS on MacBookPro11,5 (Retina) with Mac OS X Yosemite following this guide: https://help.ubuntu.com/community/MacBookPro11-1/Saucy The thing is that I already have Windows ...
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1answer
87 views

legacy boot in case of lost uefi ubuntu

I have windows and ubuntu installed in uefi mode. But, if I loose my bios config or reset settings to default, I loose ubuntu's boot. And when it's happens, I just can boot windows. I think there is ...
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1answer
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rEFInd Question: Remove multiple boot items?

Just installed Ubuntu on a separate drive (not partitioned with any other OS), as well as rEFInd, on my Mac Pro. I managed to get it all to start up properly and can boot to any of the locations from ...
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Install Ubuntu 14.04.2 LTS alongside Windows 8.1 Dual-Boot on RAID Acer S7 question marks installation popup error “???”

While installing Ubuntu, the option 'Install Ubuntu alongside Microsoft Windows 8.1' doesn't show up. After properly configuring the computer's UEFI settings and partition the drives, the Install ...
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Ubuntu 14.04.1 LTS installer does not recognize Windows 7

I'm installing ubuntu and it seems I cannot get it to recognize windows 7. My laptop is a dv6tqe-7000 purchased approximately December of 2012. I have ubuntu's iso file burned onto a DVD which boots ...
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1answer
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GNU GRUB, Minimal BASH-like line editing screen displays before the usual GRUB screen when dual-booting Ubuntu 14 and Windows 8.1

I have read a couple of posts similar to this issue, but it seems many of them could not boot to Ubuntu after getting this screen due to a bad boot manager. It does not seem this is the case for this ...
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1answer
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No USB boot. No CD boot. Can I install Ubunto on a Mac Mini?

I've been through the answers to similar questions, but they all require USB or CDROM booting. I've installed EFI - it might be that I've not done that correctly, but it boots in EFI, but doesn't find ...
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6answers
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Ubuntu 14.04 on mid-2009 macbook pro not booting

I have a 15-inch 2.53ghz mid-2009 macbook pro (in some places known as "macbookpro 5.4"). I wanted to dual boot mac os x with ubuntu 14.04 desktop 64-bit, so I set up a secondary partition using disk ...
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1answer
469 views

update-grub always removing windows EFI entry

My laptop (Vaio SVS1312C5E) always seems to start the Microsoft/... entry in the EFI partition if it exists. I can make ubuntu boot by mounting the EFI partition and renaming the Microsoft/ folder to ...
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4answers
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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 ...
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3answers
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Cannot boot after Ubuntu 13.10 install on UEFI machine

My ultimate goal is to get Ubuntu working on my new Sony Vaio Pro 13, a Haswell ultrabook. The hardware seems to be well-supported as I can boot a LiveCD and use the system fully for as long as I ...