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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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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2answers
303 views

If I turn on the UEFI, will my BIOS mode installed operating systems be damaged in any way?

I have triple boot system. One of them is ubuntu. All of them are installed in legacy BIOS mode. Whenever I boot to Ubuntu, it shows kvm disabled by BIOS. My PC supports UEFI BIOS hardware which is ...
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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
183 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
15k 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
492 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
27k 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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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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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
87 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
344 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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1answer
860 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
280 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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3answers
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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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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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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
4k views

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
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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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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
56 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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1answer
2k views

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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1answer
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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
4k views

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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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
429 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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3answers
8k views

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 ...
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3answers
6k views

Install grub2 to usb-drive in order to boot to hdd-installed Ubuntu 13.04 x64 in UEFI mode

I've been trying to find a way to install grub2 to a usb drive, in such a way that I can boot a PC in UEFI mode into Ubuntu, without modifying the UEFI firmware settings in any way or replacing the ...
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2answers
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Dualboot (Win 8 / Ubuntu 13) is stuck at 'switching to clocksource'

for days I have been crawling the web for solutions to my problem, but couln't find any. Here it is: I got a new Laptop (ASUS Vivobook S200E) with Win 8 OEM preinstalled. I wanted to create a ...
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1answer
915 views

Will Windows 8 removal and secure boot disable cause no problem in using Ubuntu?

I heard that recent laptop computer with Windows 8 operating system enables secure boot which can cause problem while installing or using Ubuntu, and worrying because I have a plan to buy laptop with ...
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1answer
926 views

Ubuntu 12.04.2 - OEM installation - UEFI mode

I want to install Ubuntu 12.04 in a laptop with a Windows 8 preinstallation in UEFI mode. I followed the instructions here and I use a 64bit iso of 12.04.2. When I boot from USB (in UEFI mode) the ...
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1answer
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GRUB2: When I choose Windows 8, error invalid EFI file path

I had a problem with install Ubuntu 13.04 next to Windows 8. I have a Dell inspiron 15 notebook with UEFI. In Boot-setup I changed to Legacy Boot on and switched UEFI boot off. Then I installed ...
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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
8k views

Windows 8 Dual Boot Ubuntu 12.10 with UEFI broken Windows boot manager

Brand new Asus U500VZ, Windows 8 preinstalled. I removed the fakeraid, turned fastboot and secure boot off, and set the SATA to AHCI and deleted all existing partitions on both SSDs. Purchased ...
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3answers
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Installing ubuntu besides windows 8 [duplicate]

I have been trying to install ubuntu (I tried 12.04LTS, 12.10, 12.10-secure-remix) using the wubi installer on Windows 8 and all the three times ran into the same problem showing some cannot find ...
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1answer
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Is there anything to remember when I exchange my /?

I have a laptop computer with the following setup: / on a btrfs /dev/sda3 subvolume @ /home on a btrfs /dev/sda3 subvolume @home /boot on an ext4 /dev/sda2 /boot/efi on a vfat /dev/sda1 no swap /tmp ...
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2answers
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How to make live DVD EFI bootable?

Equipment: Pre-loaded Windows 8 Laptop, needs multi-boot capability (Win8 + Linux and BSD) Lots of USB 3.0 sticks and blank DVD-Rs. Various ISO's, including Ubuntu Secure-remix 12.10 Problem: After ...
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3answers
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can't boot the Live DVD in my pc (UEFI, windows 8 dual boot)

I have a Dell XPS 8500 pc, with windows 8, and UEFI, I want a dual boot with windows 8 and ubuntu 12.10(64 bits) .. then I was reading the next tutorial: http://help.ubuntu.com/community/UEFI but ...
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2answers
8k views

Can't boot from liveUSB when trying to install it alongside Windows 7

I'm very noob at Linux and installing techniques. I want to install 12.04 from bootable usb flash alongside Windows 7 (also tried live CD but not working) but computer is not booting from USB flash or ...
3
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1answer
705 views

Computer Turns Off instead of Suspending/Sleeping

I recently assembled a new computer with the second generation Intel Core i7-2600K processor (Sandy Bridge) and solid state drive. The solid state drive is only 60 GB and I have lots of RAM so I did ...
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1answer
2k views

How to fix “Disk drive for /boot/efi is not ready or not present”? [closed]

After I updated BIOS/UEFI version to 1101 on an Asus P8Z68-V PRO motherboard Ubuntu (11.10) did not boot. After POST all I saw was a black screen with a blinking cursor in the top left corner. I ...
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1answer
22 views

Can't boot on Win 8 after installing Ubuntu : “A required device isn’t connected or can’t be accessed”

I have a lot of troubles setting up a dual boot on my new computer. After I set up and wired up the hardware I installed W8 as I guessed it would be harder to install with Ubuntu already installed. ...
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1answer
56 views

Question about making EFI bootable USB flash drives

This has puzzled me for far too long. Sometimes, a simple copy/paste of the contents of the iso is enough to make a bootable usb for the OS I try to use, while sometimes, copy paste does not work ...