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 boot to initramfs/busybox

I have an Alienware 17 R2. I installed it with 2 SSD and 1 HDD. I have windows 8.1 and install ubuntu 14.04. The disk list is: Disk 0: HDD Vol 1: Data Disk 1: SSD Vol 2: Ubuntu Disk ...
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1answer
17 views

Installing Ubuntu 14.04 on Dell Optiplex 9020

After disable safe boot options on BIOS, change UEFI to Legacy option I could boot Ubuntu from USB, it is not installed on computer. But it skips part of the left side of the screen and does not show ...
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1answer
28 views

What should I do as apt-get wants to remove grub-efi-amd64-signed

I'm on 15.04 and latest upgrade shows grub-efi-amd64-signed as "to be removed" (along with upgrading grub-common, grub-efi-amd64, grub-efi-amd64-bin and grub2-common) I'm using EFI secure boot, so I ...
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1answer
31 views

Bottom of Screen of 4k Display is Black

I just bought an Acer Aspire VN7-591G-70CY (4k display version) and installed Ubuntu after disabling UEFI and using this (nomodeset). It didn't work with UEFI enabled. In the live session and with ...
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1answer
45 views

Grub menu not showing after installing ubuntu 15.04 in dual boot with windows

I have a lenovo g50-80 windows 8.1 is preinstalled in uefi mode. I changed the mode to legacy mode then installed ubuntu 15.04. but even after installing it boot menu was not coming. Then I changed ...
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2answers
27 views

Messed up grub boot order

While I was messing around with my boot order I moved efi firmware to the top and restarted my machine. Now I am stuck in a loop of uefi and boot orders trying to get back to my desktop. How do I fix ...
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19 views

How to add windows 8 to Grub 2 [duplicate]

Ok, my computer has windows 8 preinstalled, i wanted to have dual-boot so i tried to add ubuntu in the easyBCD, now i cant boot to windows and in grub2 only ubuntu appears. I ran the boot repair and ...
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22 views

Can't boot into Windows 8.1 after installing Ubuntu (Elementary Freya) [on hold]

I wanted to try out Linux so I installed Elementary OS Freya (which is apparently an Ubuntu fork) following these instructions, but I lost the ability to boot into Windows now as it doesn't show up in ...
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1answer
23 views

I'm not able to boot to Windows after installing Ubuntu 14.10

I have Lenovo G50 laptop and I installed ubuntu to my system in different drive. When the grub comes and clicks on "Windows" I get an error message which tells that "The current hardware and software ...
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1answer
48 views

How to install ubuntu alongside installed windows 8.1?

I am trying to dual boot windows 8.1 and ubuntu, but i don't know exactly how to do it, since i tried it once and it went really wrong. Now, as i said, i have windows 8.1 installed, and in system ...
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17 views

Dual boot with Linux Mint and Windows 8.1 [closed]

I bought a Toshiba Satellite specifically to dual boot Linux Mint (v. 14.x). Not thrilled with Win 8 but will keep it for now. I read article in Ubuntu forum about dual book with Win 8. It said that ...
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21 views

Ubuntu UEFI boot option disappeared [closed]

Two months ago, I installed 2 OS's on my laptop, Ubuntu 14.04 and Windows 8.1. (Both UEFI Boot) I installed Ubuntu first and then Windows. Everything works fine. I press F12 and the boot options ...
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1answer
33 views

GRUB2 issue after removing windows and reinstalling ubuntu

Short version Cannot restore EFI partition with boot repair. Create a proper partition AND put a /EFI/ folder into it, then used boot repair Original question I originally had a dual boot with win 8 ...
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1answer
23 views

Grub 2 doesnot show any OS.

I am using Dell Inspiron 15 3000 series that originally came with ubuntu. I changed it to windows completely according to my needs. Today I tried dual booting with Elementary OS Luna. I installed it ...
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1answer
90 views

Dual boot Windows 8.1 and Ubuntu on SD card EFI (Chuwi VI10)

I have bought a Chuwi VI10, very cheap chinese computer dual booting Windows 8.1 and Android. It runs InsydeH2O BIOS. I got rid of the Android stuff and decided I wanted to install Ubuntu on the ...
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1answer
22 views

A new SSD with copied partitions and UEFI dual bootable

I got DELL Inspiron 5521 notebook with 1Tb spinning drive /dev/sda which holds several partitions, Win7 among them on /dev/sda5 and Ubuntu root partition on /dev/sda7. It is dual EFI bootable. Today ...
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1answer
162 views

Ubuntu 15.04 doesn't boot on Dell XPS 13 2015

I wanted to upgrade from Ubuntu 14.04 LTS to the new Ubuntu 15.04 on my Dell XPS 14 2015 Developer Edition, because most issues seemed to be fixed in the live version. Therefore I wiped the hole disk ...
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0answers
56 views

Make Grub start from live CD [closed]

I have a dual boot setup between Windows 8.1 and Ubuntu. My laptop had secure boot but I ended up disabling it because I couldn't install Ubuntu. I now boot to Grub, where I can choose what OS to boot ...
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1answer
55 views

How to install 15.04 in not UEFI mode

I've got Windows 8.1 installed in not UEFI mode. I'm trying to install Ubuntu 15.04, the problem is that my usb stick wouldn't boot. The only way I got it to boot my USB stick was turning my BIOS to ...
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0answers
15 views

fresh install 14.04, screen and wifi not working on reboot

I am having strange problems with ubuntu LTS, fresh install everything goes ok, no errors to be seen, works ok accept when i try to do a software shutdown or restart when it gets past the grub ...
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0answers
21 views

boot repair gets aborted

Installed Boot-Repair and ran (Recommended Repair); it gets aborted showing me this message: "Please use this software in a live-session (live-CD or live-USB). This will enable this feature"... which ...
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1answer
31 views

UEFI Dual Boot partitioning with 14.04 and Win 8.1 on SSD + HDD

I'm setting up a new machine with a SSD and a HDD. Windows is for gaming and Ubuntu for working. I'll install 8.1 first and leave 10GB on the SSD for /. On the HDD I'll leave 120GB for /home and the ...
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1answer
32 views

grub missing after laptop maintenance [closed]

I cleaned my laptop fan today, having to remove my hard disk. Now, grub is missing : my laptop boots on windows automatically. I had a debian testing - windows dualboot. Boot Mode : [UEFI] Secure ...
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0answers
27 views

Window Bios lost After setting environmental variable [closed]

I have installed Ubuntu 14.04 in my laptop After setting the environmental variable , i have been lost the bios booting in my laptop , i am using the Lenovo G500 preinstalled windows 8.1 , i have ...
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25 views

Ubuntu 14.04 won't boot after running windows drive on PC EFI / LVM question?

I have an Acer desktop box that came with a windows 7 on the hard drive. I added a 1TB hard drive (with the windows 7 original drive disconnected) and installed Ubuntu 14.04 using the LVM option. As ...
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17 views

Trouble booting after each kernel update

For some days now I have trouble booting after updating the kernel. I'm using UEFI without secure boot. Until 3.19.0-18 it all worked fine. When upgrading to 3.19.0.20 the system did not boot with ...
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0answers
33 views

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
90 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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0answers
124 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
40 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
79 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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0answers
21 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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0answers
36 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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0answers
13 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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2answers
52 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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0answers
41 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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0answers
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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0answers
24 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
43 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
36 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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0answers
38 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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0answers
24 views

Cannot Install 15.04 - old BIOS no UEFI support

How do we install 15.04 when the PC has no UEFI support? The option to write a boot stiffy as given in the readme is also ridiculous as we stopped using stiffy drives years ago. In fact you cannot ...
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1answer
34 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
25 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
54 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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0answers
35 views

Dual Boot Windows 7 and Ubuntu on same SSD, with an extra HDD, UEFI

I have been using windows 7 for about 2 months now with the OS installed on my 250 GB SSD and other things like games on my HDD. I have been trying to install Ubuntu alongside windows 7 onto my SSD ...
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1answer
54 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 ...
2
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1answer
59 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
40 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
34 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 ...