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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Ubuntu UEFI Windows 8.1 Dual Boot

I have installed Win8 and Ubuntu side by side before in the past and had issues with booting which were fixed perfectly the first time using boot-repair. This time, I installed Win8.1 and Ubuntu with ...
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0answers
532 views

Why is there no EFI boot loader on the Ubuntu 12.10 x64 Netinstall? (mini.iso)

Im trying to boot the netinstall(mini.iso) toasted to an usb-stick, but there is no EFI loader in that iso image. so it is not possible to load that kind of installation type on an efi powered system. ...
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18 views

Computer does not boot after changing hdd and reverting back

1) I have an existing HDD in my computer that dual boots linux and windows using the traditional bios way. 2) I then took out the existing HDD and swap in a new HDD to install linux on it with uefi. ...
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100 views

Ubuntu installation VS UEFI on Dell XPS 13 9343

I have heard that there are problems with Ubuntu on the Dell XPS 13 9343, however - I cannot even make the boot menu pop-up when booting from an installation pendrive (lastest Ubuntu, lastest ...
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62 views

How to boot Windows 8 installed in legacy mode using GRUB in EFI mode?

This question is linked to this: How to boot Windows 8 from a legacy MBR partition in UEFI mode via GRUB? But I can't access windows anymore, so I can't run bcdboot. Here's my partition tables: ...
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64 views

Does the Ubuntu installer create a hybrid MBR partition table on EFI systems?

I have a MacBook Air that previously ran Fedora with a dual-boot Windows side for a few engineering tools. I recently switched back to Ubuntu, installing Ubuntu over Fedora using the same EFI boot ...
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0answers
454 views

how to enable secure boot after the installation

Kubuntu 14.04 64bit on a MS-DOS (MBR) type HDD (sda4) Kubuntu 14.10 64bit on a GPT type HDD (sdb5) Windows 8.1 64bit on a GPT type HDD (sda3) these are my installed OSes, both kubuntu installations ...
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142 views

How can I remove Ubuntu record from my boot list?

I've installed Ubuntu 12.04 on an external USB3.0 drive. I selected sdb (the usb stick) as grub point and created a new ext4 partition as root on sdb1. Everything went very well and I could either ...
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960 views

Error in boot repair after installing Ubuntu 14.04 alongside Windows 8.1

I`ve installed Ubuntu 14 in my note following instructions from some tutorials in the internet, I had to enable legacy mode to boot from pen drive. Basically, I created the following 4 partitions in ...
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409 views

Ubuntu 14.04 Trusty with UEFI + Software RAID1

How to install Ubuntu on UEFI BIOS with Software RAID1? Should there be 1 partition for EFI and another partition for RAID1 (root+swap) on each drive? I wonder how it will update one EFI partition ...
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2k views

How to boot Ubuntu alongside Windows 8.1, not modifing Windows bootloader?

I know there's a few questions have been asked similar to this one, but I didn't find what I wanted. I want to install Ubuntu 13 (13.10?) alongside Windows 8.1. The thing is Ubuntu doesn't recognize ...
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173 views

Windows 8 overwrites boot with Ubuntu 12.10

I have a Sony VAIO S series with Windows 8 preinstalled and then I installed Ubuntu 12.10 partition. The first time I was booting the Grub appeared, and I was able to choose between Windows 8 and ...
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149 views

Problems installing 12.04 alongside Windows 8

I have a Lenovo Y400 notebook, and I hate Windows 8. So, I tried to install and dual-boot Ubuntu. I immediately ran into problems. First of all, 13.10 won't boot. Unfortunately, I haven't tried it ...
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1k views

Ubuntu 12.04 Hangs at “Where are You?” during install

I am trying to dual-boot a brand-spanking new rebuilt computer. I bought (2) 128GB Samsung 840 pro SSDs with the intent of installing Windows 8 (new) on one and Ubuntu on the other... with a 500gb ...
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0answers
784 views

How to boot Ubuntu 12.04.2 LTS with UEFI, Nvidia graphics and dm_crypt encrypted LVM

I've just gotten 3 new systems, with Nvidia GTX 660 graphics, Z77 chipset and AMI UEFI BIOS. I've installed Ubuntu 12.04.2 LTS from the Alternate Installer in order to install onto an encrypted LVM ...
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0answers
2k views

dell inspiron 15z problems booting Ubuntu in UEFI mode

After several tries I managed to install Ubuntu 12.04 in EFI mode (GPT partition table) on my DELL Inspiron 15z. What worked for me is what is in this post http://askubuntu.com/a/224332/149034, i.e. I ...
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1k views

12.10 installation with LUKS encryption & LVM in EFI mode

I'm trying to figure out how to perform an installation of Ubuntu 12.10 (in UEFI mode) with LUKS encryption and LVM scheme. What I've done so far: Booted on a GParted Live CD 0.14.1-6 in "UEFI mode ...
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26 views

Boot repair fails to repair my dual boot (ubuntu 14.04 and windows 8)

Usually when I start my laptop, grub starts and allows me to boot either ubuntu or windows. However, after a windows update yesterday, windows is started automatically and selecting ubuntu in the ...
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103 views

Being dropped to emergency mode after upgrading to 15.04 with encrypted hard drive

I had installed ubuntu 14.10 with encrypted lvm and uefi mode on my hard drive. There are two hard drives which are encrypted. The first contains the root file system and the second contains a sharing ...
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53 views

Installing Ubuntu with SSD in a Toshiba Satellite L50-B-137 (PSKT4E)

I have recently upgraded the BIOS in my Toshiba Satellite L50-B-137 (PSKT4E) to the latest (Version 2.00) and I am trying to install Linux Ubuntu on a brand new OCZ ARC 100 SSD drive (480GB). I am ...
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30 views

Struggling to boot back into windows after installing ubuntu 14.04

I have a question, and hold on, could be a long one. Previously, I have dual booted my computer with linux mint 17.1. I do not know how I bypassed Uefi, but I somehow disabled it. So, previously I ...
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113 views

Unique problem facing installing Ubuntu 14.04 alongside preinstalled windows 8.1 on laptop lenovo z7080

I have recently buy lenovo z7080 laptop which has windows 8.1 pre-installed. I updated all the drivers and started to dual boot alongside windows with ubuntu 14.04LTS using dvd. I did enable legacy ...
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91 views

Reboot loop trying to install 14.04.2 amd64 on new ASUS A88XM-A

This system is brand new with no OS. mobo: A88XM-A with bios version 2102 x64 CPU: AMD A10-7700K GPU: Radeon R7 Plus 8GB RAM, 1TB HD, SATA DVD R/W etc. Trying to install ...
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93 views

Persistent Ubuntu on a USB drive

From the title, my question probably sounds very similar to old questions but as far as I can tell it is not. I've looked through many of those questions and have not found an answer to my complete ...
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121 views

Full Disk Encryption on Mac PC with EFI dual boot

Recently I installed Ubuntu Server 14.04 LTS on my Mac Mini late 2011 using the instructions in the article "Ubuntu + Mac: Pure EFI Boot". Now, I want to do dual boot in my Macbook Pro where I already ...
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88 views

Unable to install ubuntu alongside windows 8.1 with raid0: no partitions detected

I tried installing Ubuntu 14.04 alongside windows 8.1 on my machine using an Ununtu USB drive in UEFI mode, but no luck: My machine is Asus UX301, preinstalled with Windows 8, upgraded to 8.1. Got ...
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0answers
79 views

Booting Ubuntu from USB

I have tried a persistent installation of Ubuntu 14.10 on my PNY 32GB USB2.0 to use as a portable OS to boot my PCs. Everything is alright. I can boot my two PCs with the flash drive, however, as ...
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96 views

Windows 8.1 Dual Boot Ubuntu 14.04 - dmraid and fixpart

I'm trying to install Ubuntu 4.14 on dual boot with Windows 8.1, but when beginning the LiveUSB the Ubuntum, the partitions created by Windows 8.1 are not recognized, reports that all is HD as ...
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177 views

Ubuntu 14.04 & 12.04 on Asus EeeBox PC EB1037 hangs at boot, EB1033 works fine

We're having issues with Asus EeeBox PCs, specifically the EB1037. We also have the EB1033, but those seem to work without issue. I believe the main difference is BIOS vs UEFI and better GPU on the ...
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116 views

Ubuntu Boot error: NMI watchdog: enabled on all CPus

So, I cannot get Ubuntu to boot on my laptop: I insert my flash drive and change the boot priority and the normal screen of "try Ubuntu before installing" appears. That is what I select. 95% of the ...
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112 views

Has the bootoption “acpi=noirq” any disadvantages in permanent use? Help me with debugging acpi pls

I am using Ubuntu for a while now and I have an average knowledge of it, I thought so ;), but have a problem I cant solve alone. I did a lot of research, but now I cant find an other solution and I ...
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0answers
57 views

Trouble installing ubuntu from live usb on a windows 8 laptop

I have an asus laptop with windows 8 preinstalled on it. I dual booted it last year and everything worked. then the windows 8 side totally crashed. if it lets me in at all, all I see is the home ...
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1k views

Ubuntu on Surface RT?

A continuation of Can Ubuntu run on a Microsoft Surface with Windows RT? Regarding the Duplicate Votes: Technology has changed. Now that Ubuntu natively supports UEFI and Secure Boot, this ...
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217 views

Mac mini 2014 not booting Ubuntu 14.04 (no dual boot)

I just installed Ubuntu from a live usbkey on my brand new mac mini. Clean install to main HD with no dual boot or funny business: I plan on booting Ubuntu from the internal HD and connecting an ...
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0answers
443 views

Fresh install of 14.04 - Gave up waiting for root device

I hope you can help me. I've read many, many questions and solutions to my problem on here, however so far I have been unsuccessful in resolving the issue. The system is a Asrock e350m1, 4GB RAM, ...
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124 views

ubuntu live cd no detected operating system mac

I have installed refind on a 2012 MBP running OSX 10.10, made free space with Disk Utility, and created a live cd of Ubuntu 13.04. When I get to the choice of where to install it, it says there is not ...
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92 views

Ubuntu signed Grub do not prefix tftp-root directory for tftp requests

$ lsb_release -rd Description: Ubuntu 14.04.1 LTS Release: 14.04 dpkg -l grub-efi-amd64-signed Desired=Unknown/Install/Remove/Purge/Hold | ...
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91 views

Ubuntu Installer does not recognize existing partitions

History of my laptop: Acer E1-572 with Windows 8.1 preinstalled. I then dual booted with ubuntu without any problems. Then I came across a booting problem which I resolved by reinstalling ubuntu over ...
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0answers
62 views

MacBook Pro 1,1 Not Detecting Grub?

I just installed Ubuntu 14.10 on my MacBookPro 1,1. The installation went okay, however GRUB does not work. It's not even detected. I can not bless the Linux disc due to a wiping of OSX. I do not ...
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288 views

Ubuntu won't boot after install on ssd

Last week I bought new Acer Laptop which came with a pre-installed Windows 8.1. I replaced the factory 500GB HDD for a Crucial MX100 256GB SSD, after which I used a bootable USB device to install ...
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48 views

How can I compile and sign Grub in a way that Secure Boot will allow?

Since the file .efi of Grub2 compiled by myself hasn’t gone through code signing (such as EV code signing certificate), and now my program (.efi file) can’t boot computers which have enabled Secure ...
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203 views

core.img cannot be found

I get this after trying to reinstall grub using boot-repair: Grub2 (v1.99-2.00) is installed in the MBR of `/dev/sda` and looks at sector 778209992 of the same hard drive for `core.img`, but ...
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Need help installing on an odd Win8/Android pc

I was given a Windows 8/Android tablet that will not boot properly. If it tries to boot into windows I get a CRITICAL_PROCESS_DIED error every time. There is no option to boot into Android. I want ...
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201 views

Ubuntu partitioning and dual boot install on Lenovo IdeaCentre Q190

I just purchased a Lenovo IdeaCentre Q190, which has secure boot and uefi. I have minimized the Windows 8 partition to 100 GB. What I need to know is: 1) Should I move the free space to the end of the ...
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246 views

Dual Boot Windows 8.1 and Ubuntu 14.04 no GRUB appearing going directly to WIndows

I was trying with my friend to Install Ubuntu 14.04 In Dual Boot Mode With Windows 8.1 UEFI in my new Toshiba laptop. The installation of Ubuntu was finished successfully. However when I rebooted ...
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105 views

How to make Windows 8 appear in a boot menu when dual-booting with Ubuntu?

I want to ask how to create GUI for choosing OS when booting my notebook. I have Windows 8 preinstalled on my notebook, and I wish to have a dual boot system with Ubuntu, However, after Ubuntu ...
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356 views

boot XEN under UEFI-only BIOS

Is there a way to get XEN 4.4 booting from UEFI mode BIOS? My AMD64bit laptop does not support direct CSM/legacy boots. A nasty workaround has been to boot from a specially made USB pendrive with ...
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0answers
454 views

How to install on Lenovo IdeaPad Flex 15D

i would like to know how to instsll install Ubuntu 14.04 on my Lenovo IdeaPad Flex 15 D that have Windows 8 based on UEFI firmwares and have hidden partitions for recovery, so i saw a lot of YouTube ...
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66 views

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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101 views

Mac with NO internal hard Drive/brokenEfi and ubuntu

a few years ago I got an old Mac (2009 version). I tried to fix it but I gave up after days of workimg. Last week i tried it once again. It seems that there is no (totally broken, I dont know) Hardd ...