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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black screen of death on install

So before you go and flag this as a duplicate please read! So I boot off of my uefi usb and hit install ubuntu and all that pops up is a black streen with a window but that window just contains a ...
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48 views

UEFI Bios, Ubuntu 12.04 and Secure Boot blocked

I have a problem, how I can boot Windows 7 / Windows 8 32-bit on my laptop, has blocked all options related to UEFI default. (See photo) At this time, I have Ubuntu 12.04 on a 16GB mSATA SSD and a ...
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107 views

No alongside option [duplicate]

I want to install Xubuntu on a Sony Vaio Fit 14. I followed the this guide, but when I want to install it from live USB there is no alongside option. I guess it´s because I have more than 4 primary ...
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35 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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42 views

Dual Boot Windows 8.1 and Ubuntu 14.04.1 (UEFI) [duplicate]

I Want to Dual Boot Windows 8.1 and Ubuntu 14.04. Windows is installed in UEFI and i try to install Ubuntu everything gets messed up and i cant even boot windows.Am i doing something wrong ?? Can ...
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1answer
182 views

Show ubuntu boot as UEFI in boot selection HP Envy

I've recently installed xubuntu on my HP Envy 15. I can't set it as default boot because it is not seen as UEFI boot. The strange fact is that the usb drive I used to install xubuntu (made with ...
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2answers
89 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
197 views

How to give boot priority to grub2 on HP Envy 15 notebooks?

Yesterday I installed xubuntu 14.04 on an USB3 ultrafit pendrive just to avoid modifying the partition table of my new HP Envy 15 jxxx. Everything works fine, xubuntu do perfectly this job... but ...
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49 views

Why did dual boot system stop booting Linux?

I'm trying to understand why the following happened... I think (hope) I can fix it using boot-repair but have not yet tried. To clarify... I had a successful UEFI dual boot setup with Win 7 64bit (no ...
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1answer
384 views

Partition and file system scheme for Win 7 and Ubuntu 14 dual boot with UEFI and GPT [closed]

After looking through a lot of different guides and information on this site and others, I have a basic idea of a partitioning scheme to use for a dual boot Ubuntu-Win7 machine but I'm not so clear ...
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0answers
167 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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111 views

efibootmgr Persistence on HP Envy Laptop

I have a HP Envy laptop, with a spinning SATA hard drive on /dev/sda and an mSATA SD on /dev/sdb. Legacy boot mode doesn't appear to work, since it wants to boot from sda not sdb, and the BIOS ...
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2answers
138 views

I cant install Ubuntu alongside Windows 8.1

I have a computer running windows 8.1, and I want to install ubuntu along side of it. However, my computer has some corrupted system files on it when I bought it, so I took it into a local store to ...
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132 views

dual boot - ubuntu 14.04 not able to change boot from legacy support to UEFI, preinstalled windows 8.1 lenovo flex 15

Mistakenly I installed ubuntu 14.04 on legacy support and my laptop has pre-installed windows 8.1 on UEFI system. To switch bewtween operatin systems I have to first switch bios. Also, I am not able ...
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1answer
108 views

no dash/applets shown after installing ubuntu desktop on ubuntu server 14.04 64bit

I tried to install Ubuntu Server 14.04 on my server i.e: - Motherboard: mini-ITX GIGABYTE H77N-WIFI - Processor : Core i3 - DDR3 : 8 GB - SATA HDD : 1 x 500GB, 3 x 1TB - Network if: ...
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0answers
39 views

How to get a system installed to an external USB HDD to boot on UEFI PC

I have installed Ubuntu 14.04 to a USB HDD which I have been doing since 2011 for use on multiple PCs at work and with the HP EliteOne 800 all-in-one PS this is no longer working. The drive does ...
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1answer
297 views

Removing Ubuntu from boot manager

I have a similar problem like in this post. The answer there suggests using the 4 commands: sudo apt-get install efibootmgr sudo modprobe efivars sudo efibootmgr sudo efibootmgr -b X -B At first, ...
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221 views

Not sure which way to dual-boot Ubuntu 14 and Win8.1

I have a Dell Inspiron 1500 3000 series and it came preloaded with win8.1 and I would like to dual-boot Ubuntu 14. I have read 10+ guides and watched 5ish videos and I feel fairly confident that I can ...
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1answer
482 views

HP envy 15, Boot from usb

I'm trying to boot a live usb from an HP envy 15 but I can' seem to do it. I have already entered the bios setup, disabled secure boot, enabled legacy support. But, the bios sasys that when legacy ...
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0answers
18 views

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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1answer
253 views

Complications With Dual Boot Of Ubuntu and Windows 8 UEFI

I have been all over the entire askubuntu.com trying to find a solution to my present issue but none has brought any joy, so I gave up and just had to post this. I have an HP Envy M6 pre-installed ...
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2answers
71 views

Windows is protecting himself

I have installed Ubuntu 14.04.1 LTS. It is dualbooting alongside with windows 8. The computer is a VAIO SVE151G17M and they are booting from the EFI partition. Now the problem: When I start my ...
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1answer
1k views

'Windows boot manager' option on Grub

I wanted to try ubuntu on my laptop without installing it, so I thought that installing the “ubuntu CD boot helper” would be useful; I installed it on windows 8 and, after that, everytime I turned the ...
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1answer
257 views

Dual boot pc boots directly to ubuntu instead of showing grub menu

I installed windows 8.1 on my new laptop (which came with freedos), I later tried to dual boot the pc with ubuntu 14.04 (with legacy mode). I didn't get an option to install alongside windows 8 so I ...
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0answers
98 views

Boot repair error: Ubuntu not bootable even after reinstall

After resetting my bios to its default settings, Ubuntu was unable to boot. Only the UEFI-partition would show up when hitting f12 with no other boot options. I reinstalled Ubuntu several times but to ...
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1answer
82 views

No boot after reseting bios to default, Ubuntu partition gone

I set my bios to their default settings in order to try and boot a Lubuntu Live-cd but something I didn't consider is that it would wipe out my Ubuntu boot-entries. The only option I have now is an ...
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2answers
510 views

Fail to run *ubuntu

my wife asked me to install Ubuntu on her HP Pavilion 11 x360 (which came with Windows 8.1), after she saw how well it works on my laptop and how little she likes Windows 8.1. Feeling confident after ...
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1answer
268 views

Can't restore Windows 8 after installing xubuntu 14.04

Got a new Lenovo G710 with Windows 8 on it. Followed the directions to install Xubuntu. Now I have a boot loader menu, but when I select the Windows item in it, Windows fails to boot. I read about ...
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1answer
152 views

Installing Windows 8 UEFI alongside Ubuntu 14.04 [closed]

So I purchased my Asus S300CA vivobook and erased and installed Ubuntu. The Win 8 CD key is embedded in the motherboard, so my question is: What do I have to do to get a dual boot going? There aren't ...
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2answers
61 views

Ubuntu 14 / Win 8.1 Install Problem

I'm trying to return to Ubuntu on a new(er) computer after I had to switch to Mint on my old machine due to performance issues. The new machine is an HP pavillion G4 w/ 4gp memory and a 500GB HD. I ...
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1answer
49 views

installing ubuntu in uefi will increase boot speed?

i came to know that uefi botting mode gives faster boots. so tell me weather ubuntu supports it ? if yes then how to install or enable uefi mode in ubuntu ? i have tried enabling uefi mode from ...
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3answers
148 views

Make Windows the default boot option in an UEFI enabled system

I have admin rights on my Windows desktop, and I want to install Ubuntu on it, as I use Ubuntu on my desktop. However, I don't want any menu asking to select Ubuntu or something else or that it boots ...
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0answers
36 views

Ubuntu doesn't see windows 8.1

Wy Ubuntu 14.04 live cd doesn't see the Windows 8.1 installation. Gparted doesn't see disk with windows /dev/sda contains GPT signatures, indicating that it has a GPT table. However, it does not have ...
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0answers
154 views

No UEFI boot option after install

I got a new laptop (Medion Akoya 6240T) and wanted to install ubuntu 14.04.1 on it. I created a bootable usb drive with unetbootin on windows 8. Stuff I did before the install: - Disable secure ...
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0answers
102 views

Dual Booting (rEFInd)

I am new to dual booting on my own. I successfully dual booted Ubuntu 14.04 (via live usb) and Windows 8.1 on a UEFI system I have attempted to replace grub2 with refind. I installed rEFInd via ...
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0answers
179 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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2answers
1k 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 ...
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0answers
262 views

BIOS not recognizing hard drives

For starters, I have this laptop: http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3184129 "ASUS G75VW-DS71 Laptop Computer - 3rd generation Intel Core i7-3610QM 2.3GHz, ...
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1answer
235 views

Switching an already installed Ubuntu 14.04 LTS from Legacy to UEFI Boot mode

I have a new Acer Aspire V3-572 with a pre-installed Windows 8.1. I tried to install Ubuntu 14.04 LTS alongside Windows in UEFI boot mode, however, the systems gives me the following message "System ...
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1answer
79 views

Damaged GRUB 2 in my laptop

I have a genuine Windows 8 pre-installed on my laptop. I installed the Ubuntu in UEFI mode, using a live CD, but now the GRUB doesn't show, hence,not allowing me to boot to windows if I want to. It ...
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1answer
376 views

How to restore Windows 8.1 boot after installing Ubuntu on flash drive

System: Dell XPS 8700 running Windows 8.1 using secure boot and UEFI. Boot Info Summary: http://paste.ubuntu.com/8340337/ I installed Ubuntu on a USB flash drive using the Live CD version. My goal ...
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1answer
92 views

Ubuntu installation confusion

I need to know what are the things that are required to successfully install Ubuntu on my PC alongside Windows 8.1. I want to install Ubuntu alongside Windows 8.1 but every forum/site mentions ...
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0answers
611 views

Install grub in separate boot partition (dual boot)

I have both Windows 8.1 and Ubuntu 14.04 installed on UEFI mode (of course, dual boot). I have used bcdedit under windows 8.1 to set grub 2 as the default boot loader: bcdedit /set {bootmgr} path ...
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0answers
17 views

Will there be an update to Ubuntu for enabling it to easily install alongside Windows 8.1? [duplicate]

Will there be an update to Ubuntu for enabling it to easily install alongside Windows 8.1? I have seen the various options to play with the restrictions made by UEFI and install Ubuntu through the ...
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2answers
694 views

How Can I Get GRUB to Work After Restoring Deleted EFI Partition?

First time posting here for help. So Friday night I was playing around with GParted and accidentally deleted several partitions. One of the was an unnamed. After doing this, I restarted and I was ...
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1answer
79 views

Can't Boot into either Windows or Ubuntu

History I first installed Windows 8.1 and left around 60GBs Unallocated. Then I tried installing Ubuntu with a USB, but the partition table I had made did not show up. I then tweaked some settings in ...
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2answers
401 views

Why doesn't live USB work in non-UEFI mode?

I have Windows 7 64 bit installed on one partition (the rest of the disk is unallocated). I made a live USB with the latest official Kubuntu 14.04 64 bit ISO. When I boot, there are two USB options: ...
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1answer
150 views

Grub doesn't detect my windows 7

It is my first time installing Ubuntu (14.04). I have Windows 7 installed on my first HDD, and installed ubuntu on my second one. To install I followed the instructions on this website: ...
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0answers
459 views

Zotac Zbox EN760 Won't Boot from USB

I wanted to install Ubuntu 14.04.1 on my Zotac Zbox EN760. It is using legacy boot, as both the "Win7 uEFI" and "Win8 uEFI" don't get past the purple screen (don't know the official name, the one with ...
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1answer
164 views

Dual Boot / Grub 2 issues (Ubuntu/Windows)

TLDR Version: Problems with Grub2. Boots straight into Grub terminal. I get some "failure reading sector errors" (details below). I've tried running boot repair several times, with a few different ...