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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Can't repair Windows 8 boot after installing Ubuntu

I’m new to Ubuntu. I installed it because I couldn’t fix the Wi-Fi limited connection problem of Windows 8.1, so I installed Ubuntu alongside Windows and the installation went OK. I can now use Ubuntu ...
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1answer
170 views

Shutdown, restart and suspend problems on Acer E5 511 (Sandy Bridge) 14.04 and 15.04

Lot's of similar problems out there. Basically I have tried most or all of the suggestions offed but to no avail. Specifically. I installed Unity 15.04 on two Acer E5 511 C1WE laptops and it seems to ...
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314 views

Ubuntu 15.04 dual boot error with Windows 8.1 with UEFI and SecureBoot

Greeting's, I've tried to install windows 8.1 + ubuntu 15.04 thrice now. But both the time's i'm left with a peculiar problem. I have UEFI and Secureboot enabled. In the UEFI there is no option to ...
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1answer
60 views

Installing Ubuntu 14.04/14.10 on a UEFI laptop in UEFI mode?

My laptop: i7 with built-in Intel HD 4400, 8GB ram, Nvidia GeForce 840M, Broadcom WiFi, Windows 8.1 64 bit. I had tried to get Linux to work but ran into a lot of issues such as screen tearing and ...
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1answer
149 views

Boot-repair: Can't boot ubuntu in uefi mode

I am aware that there are many similar questions in this site, but none of the seems to solve my problem. I've been trying to install ubuntu 14.04 alongside a preinstalled Windows 8.1 in a toshiba ...
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27 views

Dual Boot Slows Boot Time

Boot into Ubuntu has become very slow. Boot speed was acceptable when triple booting into Ubuntu 15.04 (sda), Windows 7 (sdb) and Emmabuntu (sdc). Booting to Ubuntu became very very slow after ...
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38 views

Ubuntu startup problem after installation

I recently purchased HP 14-V230TX model and I install Ubunt v14.04.2 LTS using separate partition. After installation, it doesn't show choices of OS to choose. I tried to boot using F9 but it only ...
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32 views

Server 14.04 LTS and preventing Oculus as primary display

I have my game machine dual booted with Windows 8.1 and Ubuntu 14.04 LTS UEFI. I use the server edition because I use this as a continuous integration build node when otherwise not used for gaming. ...
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1answer
84 views

I accidentally put grub on my hard drive MBR while trying to install Ubuntu on an external hard drive

I was trying to install Ubuntu to an external hard drive, but in the installer I accidentally chose to put grub on my internal hard drive MBR instead of the external hard drive's MBR. I don't really ...
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63 views

Legacy mode versus UEFI mode

I have got a Lenovo g50-70 with a SSD. The strange thing is: when I install Ubuntu in normal mode (boot from BIOS), it takes LESS time to boot( round about 8 seconds) than installing Ubuntu in UEFI ...
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27 views

Installation problem in Windows 8.1 [duplicate]

I'm running windows 8.1 pro in my HP laptop. I want to install Ubuntu 14.04.2 desktop alongside Windows but I can't do it. I asked in several forums about this problem & they say I need to disable ...
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52 views

Asus ux31a- I cant boot and I lost some options from the bios.

Ok, here is a little bit long story. ( sorry for the bad English ). laptop info: asus ux31a windows 8 64x pre installed windows 10 64x for now bios info Aptio American Megatrends version 2.15.1227 ...
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3answers
85 views

Is it safe to remove “diag” flagged partitions?

I have a samsung laptop which came with windows 8 on a 1TB HDD. I am preparing my disk with gparted. I expected to see 2 or 3 partitions but there are actually 7! Now I've brushed up on UEFI and gpt ...
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1answer
61 views

No boot loader is installed in the MBR of /dev/sda. Is that some pain to a only Win8.1 system?

After I made a dual-boot (Win8.1/Ubuntu 14.04) I wanted to remove Ubuntu. I am a really newbie guy at this. First I deallocated the Ubuntu partitions at Win8.1 and joined them into the Win8.1 OS ...
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72 views

After Ubuntu 15.04 Upgrade, Black Scren When Booting From rEFInd or Other Linux OSes

I am running an Acer laptop from 2013 [will add in here when I find the model number] and I initially installed Ubuntu 14.04, then 14.10, and afterward 15.04. Before this, rEFInd and any live USBs ...
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1answer
63 views

GRUB menu does not show after shutting down and restarting from Ubuntu on a Sony Vaio with pre-installed Windows 8 dual-booted with Ubuntu

I have installed Ubuntu 15.04 with Windows 8 on my Vaio. When I shut down from Windows and start the laptop, I get the GRUB menu and can select between booting with Windows and Ubuntu. However, after ...
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1answer
36 views

How do I get rid of GRUB without formatting my HDD

I couldn't find an answer to my question so I thought I would ask my own. Today I tried to install Kali Lunix from a USB drive. I WAS running a dual boot with Ununtu and Windows 8.1. Every time I ...
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0answers
76 views

Getting Error while installing

error: premature end of casper/vmlinuz.efi. unaligned pointer 0xc7923008 Aborted.Press any key to exit._ Whenever I start installing it gives me this error.I don't know how to remove this error. Can ...
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1answer
92 views

Fresh Install of Ubuntu, After Windows 10

I have a Windows 8.1 HP Pavilion model 2000. My younger brother decided to put Windows 10 on it, he didn't partition or back up the Windows 8.1 OS... I've tried reverting back to Win8.1 but can't. So ...
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1answer
71 views

UEFI boot order depending if usb stick is plugged

I want to tryout Ubuntu 14.04 LTS. Because I don't want to reinstall windows after this I installed it via DVD-ROM onto my usb 3.0 stick (64GB). This worked fine. The first thing when I restarted ...
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1answer
62 views

The CRC for the main partition and back up partition table are invalid

I've been having problems with my HDD since I tried dual booting ubuntu 14.04 with windows 8.1. When I was installing from the ubuntu installer I was receiving "input/output error during write on ...
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2answers
39 views

No Boot of either Win7 or Ubuntu

After an overwrite of the ubuntu in a dual boot with Win7, laptop won't boot. The option on re-installing said Replace not wipe the disk. Gparted says that the first partition is Fat32 and only 487 ...
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1answer
132 views

Failing to Dual boot Ubuntu on Lenovo G50 Core i7 Windows 8.1 system

Not able to install Ubuntu on Lenovo G50 Core i7 Windows 8.1 system. All the time the GRUB installer fails to install and the system directly boots to Windows 8.1. Even when trying with the Ubuntu ...
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2answers
84 views

Install Ubuntu 14.04 on external HDD with Windows 8.1 UEFI

I recently bought a new laptop, Lenovo Essential B50-70 MCC39MB Azerty, and I had an external HDD lying around with ubuntu 14.04 on it. I thought it would be nice if I could use this HDD whenever I ...
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1answer
44 views

How to change lowercase hex to uppercase with efibootmgr?

Lowercase hex appears to be a problem for grub2: :~$ sudo grub-install --recheck /dev/sdb` Installing for x86_64-efi platform. ** Warning ** : Boot000a is not EFI 1.10 compliant (lowercase hex in ...
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1answer
70 views

Ubuntu & UEFI - GRUB console after boot (Boot Repair output included)

I still have the problem with booting Ubuntu on UEFI based laptop (Dell XPS 13, the newest one) After booting all I can see is a Grub2 console. I tried Boot Repair, but it hasnt helped me at all. ...
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1answer
70 views

Installed 13.10 over 14.04 by mistake. Cannot boot into anything!

To start, I'm trying to boot a 14.04 live usb made with unetbootin on my own 14.04. Sometimes it hangs here Sometimes here sometimes at a blank screen and sometimes it boots just fine but ...
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0answers
39 views

windows 8.1 won't let me boot using Ubuntu

I have a Lenovo laptop that came pre-installed with Windows 8. I have tried both desktop versions of Ubuntu, and I get the same result. Upon restarting mt laptop I get a start screen called 'windows ...
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1answer
84 views

How to install ubuntu15.05 stand alone using UEFI mode and boot secure enable in lenovo flex 2?

I installed Ubuntu successfully using legacy mode but in UEFI mode I faced some problem. And Ubuntu boot loader asked me to create extra minimum 35MB space to EFI boot loader. I don’t know why? and ...
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44 views

Anyone else have problems with Dual Boot after upgrading to Windows 8.1? Help would be appreciated

I detest Windows, so when I bought a new Toshiba Satellite laptop, the first thing I did was dual boot it with Ubuntu 14.04. Everything worked fine until I inadvertently upgraded Windows last week ...
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1answer
198 views

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
101 views

Install ubuntu 14.04 alone in Lenovo B575

I remove windows 7 in Lenovo B575 and installed ubuntu 14.04 but seems like it have UEFI enabled. I was unaware of it before so to do anything from windows is now not possible. I search for everything ...
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2answers
89 views

How can I access GRUB in Windows 8.1

I have a laptop with Windows 8.1 installed. I installed Ubuntu Gnome 15.04. I can not access the GRUB to select Ubuntu, the computer just boots straight to windows. I have found the following ...
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1answer
67 views

Ubuntu 14.10 dual boot with preinstalled Windows 8

I wanted to install Ubuntu with my VAIO laptop with preinstalled Windows 8. So I downloaded the ISO image of ubuntu-14.10-desktop-amd64 and extracted to my USB drive with Universal USB installer. I ...
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1answer
55 views

Will updating the BIOS remove my Ubuntu EFI entry?

I have an HP ProBook G1 with Windows 8.1 OEM on which I installed Ubuntu 14.04 LTS in dualboot. This laptop has a BIOS that makes it difficult to change the default boot loader called at hardware ...
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1answer
45 views

Problem when installing 14.04 in Toshiba Satellite L845

I'm new on Ubuntu. I've got a Toshiba L845 (that comes with W8 pre-installed) and after having so many problems I decided to go to Linux. I do not want to keep W8 (since I can not even start it due ...
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0answers
13 views

Booting OS of Ubuntu 1.1.20.0-8ubuntu1

I have a problem in booting version 2.00-13ubuntu3 moving to recovery mode, it requires me to fill the initramfs using built-in-commands which i dont know how to add them. Help me
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0answers
22 views

Computer does not boot after changing hdd and reverting back [duplicate]

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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1answer
138 views

Installing Ubuntu 14.04 on EFI System

I recently purchased Dell Inspiron 5548. 64bit System, 8GB Ram, 2GB ATI Graphics Card It came with Windows 8.1 Single Language Edition. I completely removed the Windows, also formatted the recovery ...
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0answers
85 views

Install ubuntu on a Motherboard ASUS H81M-C

This kind of motherboards use the new UEFI BIOS. In the user guide says that it has support to the operating systems Windows 8/ Windows 7, but I need to install Ubuntu 15.04 so my question is if I can ...
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0answers
29 views

UEFI Dual boot not recognizing windows 7 partition? [duplicate]

Been messing around with Ubuntu, I actually installed it as my only OS but since my graphics card(AMD) kinda sucks on linux(For gaming purposes) - I have to have a windows partition. However, ...
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0answers
59 views

alert does not exist. dropping to a shell (external disk)

It used to be simple start the system from an external disk/usbstick. "But why make it simple when you can do in complex" I am trying boot ubuntu from USB-stick (xubuntu that is). What I have done ...
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1answer
104 views

Booting Ubuntu 14.04 from External HDD

My laptop has Windows 8.1 64-bit and since I have few space on my SSD, I wanted to install ubuntu in an external HDD. From the UEFI settings I disabled the safety boot, fast boot and so on, and I set ...
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29 views

How to boot into Ubuntu after successful installation from wubi iso file in a dvd?

I am new to Ubuntu. I use windows 8.1. I downloaded Ubuntu 15.04 from the official website and burned the iso into a disc and then from my boot menu I chose to boot from dvd/cd. All went fine, under ...
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65 views

Problem with Ubuntu 15.04 Install switched encripted areas of of my main disk

During install the only area of my disk I requested encrypted was my home folder. What actually happened was home folder is not encrypted and the rest of the disk is encrypted by a blank password. ...
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1answer
50 views

Installed Windows before Ubuntu, both in BIOS mode, but GRUB install failed

Let me start by saying I've been trying to get it to work for 2 days, and that I've read a lot. The answer could be extremely obvious but I need someone to point it out. I was trying to dual boot ...
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1answer
76 views

Cant install ubuntu 12.04, 14.04 64bit on my lenovo s205

I've read a lot of similar topics, but nothing helped. Check out my little sad story: I made bootable USB with UNetbootin. I tried Ubuntu 12.04 and 14.04, linuxmint 17.1, fedora kde, zorin. Before i ...
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0answers
37 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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1answer
33 views

Ubuntu installation on UEFI system - grub console after boot

After a short (but bloody) battle I was finally able to install Ubuntu on my Dell XPS 13 (the 2015 one). After rebooting all I can see is the grub console. Typing exit pops up the Windows system that ...
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1answer
77 views

Trying to dual boot Windows 8.1 with Ubuntu on Acer Aspire 779G

As it says in the title, I am trying to dual boot 8.1 with Ubuntu 14.04 Lts. I am starting my first big boy job as a software analyst and as you can guess they primarily use linux platforms. I ...