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 to fix MBR partition prior to Ubuntu Installation? A partition overlaps GPT backup sectors

My main problem is that i have just acquired an ASUS laptop with WINDOWS 7 and I want to install Ubuntu on it. I want to have a dual boot to choose between both Operating systems, I read that it's ...
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2answers
4k views

Is disabing Secure Boot needed for Ubuntu 14.04 dual-boot with Windows 8 UEFI

I've read some guides on dual-booting Ubuntu and Windows 8, but all of the guides I have read are about older versions of Ubuntu. They recommend disabling Secure Boot because there is a bug in the ...
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2answers
4k views

Legacy vs UEFI Help

Are there any drawbacks to installing Ubuntu 13.10 (and soon 14.04) in Legacy BIOS instead of UEFI? I have installed 13.10 64bit in Legacy by mistake and was just wondering if it would hurt anything ...
2
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3answers
154 views

How do I make my system to prompt me for Windows and Ubuntu, instead of directly booting to Ubuntu?

I have new Lenovo laptop with pre-installed Windows 8. I was facing issues installing Ubuntu l2.04 LTS, so following a thread I made some changes, created some ext4, swap, bootloader partitions and ...
2
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2answers
434 views

After installing Windows 8 next to Ubuntu, I can only boot 8 [duplicate]

I bought a new HP laptop with Windows 8 to replace an old laptop running Ubuntu. Using Acronis I cloned the Ubuntu installation over to my new laptop... accidentally overriding the Windows ...
2
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4answers
1k views

Dual Boot Ubuntu 14.04 with Windows 7 on UEFI

I just built a new computer last week, and this weekend I got around to attempting to install Ubuntu 14.04 on it besides Windows 7. This is my first experience really using UEFI, so I was a little ...
2
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1answer
810 views

Can't dual boot Ubuntu with Windows 8.1

I know this isn't the first time anyone has asked this question , I have looked around but that didn't solve my problem. I recently purchased Toshiba c-50a , with preinstalled Windows 8.1. When I ...
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1answer
2k views

How can I read the Windows 8 licence key with Ubuntu?

I have a dual boot windows 8 and Ubuntu on my Laptop. Is it possible to read the Windows licence key under ubuntu? (I guess it is hidden in the Windows registry somehow)
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2answers
2k views

What have I to do to change from BIOS to (U)EFI after installation?

I have here a new bought laptop. It's the first device with (U)EFI I was working with. At first I did not get the installation running, so I switched back to BIOS legacy mode and installed ubuntu in ...
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2answers
9k views

Does UEFI support mean Wubi will now work on laptops shipped with Windows 8?

According to this news , there is an official fix for secure boot. Will Ubuntu adapt it? If so, how long should it take? And does it allow booting new computers from Wubi?
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3answers
2k views

VirtualBox boots only in UEFI Interactive shell

I installed Ubuntu 14.10 in VirtualBox with UEFI. But now I have rebootet this OS and now it boots into a UEFI Interactive Shell v2.0. How can I boot normaly into Grub again? I hope you can help me, ...
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2answers
1k views

3TB HDD and legacy BIOS

I have new 3TB HDD and motherboard with legacy BIOS. To take advantage of full HDD capacity I have to use GPT partition table. I want to dual-boot Windows 8.1 and Ubuntu 13.10 (64-bit) from this HDD. ...
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3answers
2k views

efi boot sequence

It seems I somehow kicked out my 'diskdrive boot-option' for my blueray-diskdrive. I tried to fix it with 'efibootmgr' but I'm not getting anywhere. I think I just don't understand how to use this ...
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2answers
2k views

Can't load GRUB all of a sudden (UEFI problem)

So, the last time I used my Ubuntu installation was last night. Today, as I booted it up, it told me that booting grubx64.efi is not allowed. Easy enough. I know how to re-enable it from my BIOS. ...
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3answers
14k 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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2answers
32 views

How can I make Ubuntu not mount efi partition by default at startup?

I've a Asus laptop with windows 8.1 pre-installed, I've managed to install Ubuntu alongside it, and for some days it worked fine. Today, out-of-the-blue, Ubuntu just goes black screen and I'm back at ...
2
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1answer
80 views

Question regarding dual boot (BIOS/UEFI, SSD)

I'm totally new to ubuntu and want to ask some things before diving into it: First off I have an Asrock z77 extreme 4 and 1 SSD with Windows 7 installed. On my second (empty) SSD I want to install ...
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1answer
65 views

How to access BIOS settings with EFI?

I have a new PC, based on a Gigabyte H81m motherboard. With no hdd, I can access BIOS settings by pressing DEL at startup. When I install Windows 8.1 with EFI boot, to access BIOS settings I have to ...
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2answers
486 views

Install Ubuntu on fresh new SSD alongside with windows on another SSD

I did a lot a research to check if my question was already answered or not, but so far I've only seen two related questions in Can I install Ubuntu on a separate SSD, AFTER having encrypted my Windows ...
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1answer
4k views

UEFI: Catch-22 on a acer aspire v5-531

I was trying to install Ubuntu 14 (64-bit) on a Aspire V5-531, preinstalled Win 8. In the bios I can flag: boot mode UEFI, secure boot DISABLE in this case the neither installation USB card nor cd ...
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1answer
2k views

Ubuntu 13.04 and Windows 8 Dual Boot GRUB options/problems

I installed Ubuntu 13.04 alongside Windows 8 (which was factory installed). I have the options to turn off both UEFI and Secure Boot. The insall worked fine and I am able to use both operating ...
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2answers
21k 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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2answers
5k views

Unable to boot ubuntu 13.04 alongside windows 8

http://paste.ubuntu.com/6036784 I used boot repair commands on try Ubuntu terminal. It said "EFI detected check options" I used the recommended repair option. In the end it said "buggy kernel ...
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4answers
4k views

Ubuntu 13.04 not detecting operating system Windows 8

I have a Samsung NP740U3E with pre-installed Windows 8 (boots with UEFI). I installed Ubuntu 13.04 without problems. Later, Windows 8 did a BIOS update which messed up everything, nothing would boot. ...
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5answers
10k views

How to tell if my Laptop has UEFI

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 ...
2
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1answer
686 views

Laptop that comes with Windows 8 does not show grub

I have a Sony Vaio SVE14A27CXH that came with Windows 8 and UEFI BIOS from factory. I have been trying to install Ubuntu 13.01 with no success. I have already suffered with "Operating System not ...
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3answers
8k views

How to restore Windows 8 UEFI after deleting Ubuntu Partition?

I bought a Fujitsu with pre-installed Windows 8. I wanted to dual boot Ubuntu as I had done on my previous Windows 7 laptop. I followed some guides and managed to install it, with the GRUB boot ...
2
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2answers
12k 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 ...
2
votes
1answer
23k 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 ...
2
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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
8k views

How to install Ubuntu on an (U)EFI device with existing GPT?

I had Ubuntu 11.04 running till now. Now I want to reinstall Ubuntu with nearly fresh 12.04. I had much trouble last time to install Ubuntu because of EFI. Yet somehow I somehow got it running. But I ...
2
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3answers
4k views

Can't boot ubuntu on Lenovo V570

I recently tried to install Ubuntu on my new Lenovo V570, planning to dual boot 11.10 with Windows 7. I realized after installing that it would boot straight into Windows, so I looked up the issue. I ...
2
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2answers
125 views

Help With Dual Boot Ubuntu 14.1 and Windows 8.1

So here's my problem. I used YUMI from pendrivelinux.com, and I made a Ubuntu LiveCD. I tried manually and automatically partitioning, and I ran into many problems. After rebooting after installing ...
2
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1answer
70 views

Kernel Panic block (2,0)

This is my first question here and I'm trying to give as much information as possible: I tried dualbooting Linux Ubuntu (first Gnome then regular Ubuntu) with windows 8 on my Lenovo U310 Ideapad. I ...
2
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2answers
701 views

How to install Ubuntu and boot on Toshiba Satellite?

Downloaded and burned ubuntu-14.04.1-desktop-amd64.iso. Checked md5 of iso and md5 of burned DVD. Installed 14.04.1 LTS on a new Toshiba Satellite laptop. Replaced the existing Windows 8 install. The ...
2
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1answer
552 views

Is it still possible to install Ubuntu to an external harddrive with UEFI?

It looks like installing Ubuntu to an external harddrive isn't possible with UEFI, where as with MBR there wasn't a big difference between external and internal. Is that true or is it still possible? ...
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2answers
7k views

Ubuntu on Asus X205TA

I want to install Ubuntu on my new netbook Asus X205TA. I try to create a USB stick with Unebootin but not succes for boot on. Thanks for your help
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2answers
642 views

Opening Kubuntu DVD in Windows (EFI) gives message “Wubi doesn´t currently support EFI”

After downloading an iso-image for Kubuntu 14.10 and then burning it to a DVD. When I then tried to open it I get this message: What to do ? Can anyone please help.
2
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1answer
156 views

Is it possible to install Linux as a standalone OS with a UEFI system that came preinstalled with Windows 8?

I've tried installing Ubuntu several times as a standalone OS on my Toshiba Portege z935 which has a UEFI Bios and came pre-installed with windows 8 and it does not work. Is it really only possible to ...
2
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2answers
98 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
1k views

boot-repair fails (UEFI and pre-installed Windows 8)

I have bought a new laptop, Toshiba Satellite NB10t-A-101, with pre-installed Windows 8, after one day of figuring out how to install Ubuntu in UEFI I finally managed to do it (which wasn´t easy, as ...
2
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2answers
1k 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 ...
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2answers
2k views

OS X no longer visible in rEFInd boot after installing Ubuntu

I installed rEFInd to ESP on my Macbook Pro Retina running Mavericks (with FileVault on). Here is my partition info: /dev/disk0 #: TYPE NAME SIZE ...
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1answer
1k views

Black screen after selecting Install Ubuntu from boot menu (running Windows 8 pre-installed) [duplicate]

I have a Windows 8 pre-installed laptop here. I used UNetbootin to create a USB bootable drive for Ubuntu 14.04 x64. I resized my disk partition, and disabled secure boot. Here's my situation: In ...
2
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1answer
168 views

How to get Ubuntu installer to sense Windows 8.1 as an OS [duplicate]

When I go to install Ubuntu so I can dual boot Ubuntu with windows 8.1 on my Toshiba Satellite C55 the Ubuntu installer does not sense My pre-installed windows 8. I referred to these guides: UEFI ...
2
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4answers
444 views

Confusion about dual-booting Ubuntu and Windows 8. CSM or UEFI?

As far as I have heard, dual booting (Ubuntu and Windows) in UEFI isn't very clean, and hence people prefer CSM when doing so. But, in case my laptop has Windows pre-installed in UEFI, I need to ...
2
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2answers
456 views

Dual Boot: Windows 8 is fine, Ubuntu is fine, but will only boot when dvd is in the disk drive

I have a new computer with Windows 8.1 and have gone to work at dual-booting with Ubuntu 12.04.3. I can boot Windows 8 from the grub menu just fine, and Ubuntu appears on the menu and I can select it, ...
2
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1answer
2k views

How do I change the PC boot from Legacy to EFI mode when boot-repair warns me?

I ran boot-repair and got this warning: The boot of your PC is in Legacy mode. You may want to retry after changing it to EFI mode. How do I change to EFI mode? Is this done in the BIOS?
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2answers
10k views

Ubuntu 13.04 on UEFI system hangs at black screen

OK, so it seems this question has been asked before but not successfully answered. I have a Windows 8 Toshiba P75-A7200, and I've disabled Secure Boot, Fast Boot, and Fast Startup. Still, when I try ...
2
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1answer
3k views

“Reboot and select proper boot device” error after clean Ubuntu 13.04 install

I am having the same problem as Clean Install of Ubuntu won't boot [reboot and select proper boot device] where a fresh Ubuntu install completes but will not boot. I get a Reboot and select ...