Questions about using grub on EFI/UEFI systems relating to configuring, installing or removing grub from EFI/UEFI partitions.

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3answers
113 views

Lenovo IdeaPad 100s grub installation failed and disk disappeared

A few days ago I bought a cheap Lenovo IdeaPad 100s and it's a great laptop shipped with Windows 10. Since then I've been trying to install Ubuntu on it but I have failed to do so. What I did is I ...
3
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2answers
40 views

Which OS on GRUB to use?

I have installed Ubuntu besides Windows 8 on a ThinkPad. Upon starting the laptop there are several entries to choose from the GRUB interface where I am not sure which Windows OS entry to use. What ...
0
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0answers
18 views

Set Grub's default boot device across multiple machines

I have a USB mass storage device I use as an Ubuntu live-usb. I use Grub as the bootloader on that device. I am trying to configure Grub to boot the machine's internal drive's OS if a timeout is ...
0
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1answer
40 views

Ubuntu16.04 suddenly boots to a text-only (initramfs) prompt, restoring superblock doesn't fix it

So I thought I had faced the typical problem of getting a superblock corrupted (which I think happened because of an intended hard/unclean reboot). However after following the guide in the first ...
0
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1answer
41 views

Uninstall Windows 10 and Ubuntu dual boot

I currently have a desktop computer with both Windows 10 and Ubuntu 16.04 on it. Windows 10 is on drive C: and Ubuntu is installed on a 100gb partition on drive D: I'm not happy with Ubuntu 16.04 on ...
0
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0answers
17 views

I can boot Ubuntu only once after install

I have just reinstalled Ubuntu 16.04, and have this weird problem where I can boot Ubuntu after the installation, but I get directed straight to BIOS upon restart. I am using UEFI and have the efi ...
3
votes
1answer
73 views

How to safely remove Windows from EFI (and GRUB) [duplicate]

I can find a lot of information on the opposite (removing Ubuntu from a dual boot) but not how to remove Windows from a dual boot. I did this once before and then I just deleted the whole EFI ...
0
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0answers
28 views

Boot Ubuntu from external drive.

I have been trying for a week to install (not live cd) linux Ubuntu on an external drive. Please help me, i've been searching the Internet for days. Before i ask my question, I am totally new to ...
0
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0answers
30 views

Grub not installing in uefi mode

I have windows 10 installed and i want to dual boot ubuntu with it. I have the bios in uefi mode and my ubuntu live usb is in uefi mode and i know because i get the black grub looking menu instead of ...
1
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0answers
52 views

Installed Xenial on Mac Mini mid-2011. No options in EFI boot menu

The install went well. I've had to download b43updated.zip with firmware for the wireless network card, otherwise it's fine except for one other issue: Ubuntu boots Alt during boot doesn't show ...
0
votes
1answer
31 views

Recovery Windows boot entry

so I had Windows 10 in my laptop. I decided to install Ubuntu having a dual-boot system. For some reason I thought it would solve some issues I was having (not relevant for this case) if I formated ...
3
votes
0answers
98 views

How do I fix a black screen at login in Ubuntu 14.04?

Description of the problem I am installing Ubuntu 14.04 LTS from a UEFI USB flash drive. When I boot from the flash drive, I get the installer menu e.g. "Try ubuntu without installing" etc. It gets ...
0
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0answers
25 views

Installing Ubuntu on a toshiba satellite L10-B?

So i've been attempting on and off for about a year now to install Ubuntu 14.04 on my Toshiba Satellite L10-B. It came Preinstalled with Windows 8.1 and a super locked-down UEFI BIOS. The furthest i'...
0
votes
0answers
63 views

dual boot problem with ubuntu 16 and windows boot manager in uefi

I installed ubuntu in my dell inspiron 3521 laptop upgraded to windows 10 and uefi mode. While installing it detected windows as windows boot manager.. Installation was easy ubuntu is fine.. The ...
0
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2answers
41 views

Two instances of grub

I tried installing Ubuntu on my laptop several times and finally succeeded(dual boot) I need to select ubuntu from boot menu in order to open grub and start ubuntu So that is not my problem My actual ...
0
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0answers
14 views

Linux Boot error

I am having trouble booting into my linux laptop. When I press the power button, the screen starts up and an endless stream of [[20~[[20~[[20~........ Appears on screen. Also, the Ubuntu logo keeps ...
1
vote
1answer
75 views

Why Do I Keep Getting GRUB Command Line on Startup - Dual Booting Wins 8.1 and Ubuntu 14.04

I migrated data on my laptop's HDD which contains Windows 8.1 to my SSD and replaced the HDD with the SSD (My laptop has 2 hard drive bays btw). Currently, my Windows 8.1 and Ubuntu 14.04 are on their ...
0
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0answers
30 views

Discussion/Needing Help (Acer Aspire ES1-512-P0SY)

As said in the title, I want to discuss of why Linux (here more specifically Ubuntu) sometimes will not work. Here's my situation: I currently have an Acer Aspire ES1-512-P0SY and I feel like this ...
0
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0answers
44 views

Sometimes Ubuntu stuck on Grub command line on startup

I have Ubuntu 16.04 and dualboot with Windows 10. Sometimes startup stucks on Grub command line. I just do "exit" and grub menu appears and everything is fine. What can be the problem? How to solve it?...
0
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2answers
42 views

Ubuntu 15.10 then windows 7 dual boot issue

I've been using Ubuntu 15.10 for a while, but recently installed Windows 7 (quite reluctantly) on the same SSD (converting partition table to GPT as required) but on separate NTFS partition. I thought ...
1
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0answers
117 views

Installing in encrypted partition under EFI boot

I've been googleing for a bit and can not find an answer yet Im from a FreeBSD background, so you will have to forgive me a little I am trying to dual boot FreeBSD and Ubuntu I want to set up a ...
0
votes
1answer
68 views

Installing Ubuntu on a second internal drive in an “independent way” (no boot option)

I have a 120 Gb SSD drive (/dev/sda) where Win7 is installed and a second internal drive (/dev/sdb) that I use for data storage. Both of them have GPT partition tables. Now, I want to install Ubuntu ...
1
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0answers
26 views

GPT, grub and mdadm. sda drive replaced, raid rebuilt in recovery mode, but now server won't boot

This is how partition table loooks like: (parted) print Model: ATA TOSHIBA DT01ACA2 (scsi) Disk /dev/sda: 2000GB Sector size (logical/...
1
vote
1answer
56 views

Dual-Boot Problem with Pre-Installed Windows 8.1 & Ubuntu 14.04

I do understand similar questions already exist. Yet mine seems to be a problem that despite trying hard to address, I haven't been able to solve. Despite having a working Ubuntu LTs 14.04 ...
0
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0answers
82 views

Add grub menu for OS X

I installed Ubuntu 16.04 Desktop on my MacBook Pro, and cannot boot OS X now. My disk partition table is: Device Start End Sectors Size Type /dev/sda1 40 409639 409600 ...
0
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1answer
127 views

Cannot boot with EFI

I was having problems with repairing my boot loader (grub). My GParted config looked like: I installed another Ubuntu to the free space which restored my grub. But when booting into my old partition,...
1
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2answers
2k views

Does this answer work for UEFI computers?

One of my most popular answers is instructions on how to repair grub. Over time, others have contributed bug fixes to the answer. A recent comment, though, made me wonder if it works on newer UEFI ...
0
votes
1answer
115 views

Dual boot problem after upgrading to 16.04

During the upgrade to 16.04 something went wrong (related to shim-signed and problems with /boot/efi) and it was not completed. After some work I managed to have everything installed and Ubuntu seems ...
0
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0answers
34 views

Bootable device not working

I have HP-15-du005tu, downloaded the latest version of Ubuntu i.e 16.04 and using rufus. I've made a bootable device but whenever I restart using advanced mode (win 8.1) it always says bootable device ...
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votes
3answers
13k views

UBUNTU 16.04 ERROR INSTALLING GRUB

My computer has Windows 10 installed, and when I try to install Ubuntu 16.04, it does not detect Windows 10, nor does it detect Windows 10 in my partitions list. On the final step of the installation,...
0
votes
1answer
96 views

No GRUB, Boot-Repair-Disk asking me to close package managers… How to proceed?

So I had a perfectly functioning triple boot system (Windows 10, Ubuntu 14.04, Kali Linux 2.0). Tonight I come home boot up my system and don't get GRUB. I tried to trouble shoot from Boot-Repair-Disk ...
0
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1answer
135 views

Can't boot Windows 7 from USB, GRUB still there

I need to install Win 7 on a computer that previously had Ubuntu 14.04 installed. I created a bootable USB with the Windows 7 ISO on it, but I can't boot from it. From the BIOS/UEFI (not sure) I ...
1
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0answers
141 views

Can't boot into Ubuntu 15.10 without 'idle

I'm using Ubuntu 15.10(EFI 64bit) on MSI GS40 laptop, which has Intel Skylake processor and Nvidia's dedicated GPU. I couldn't boot to Ubuntu's installation stage without giving GRUB's boot option '...
0
votes
1answer
66 views

What to do if forgot to enable EFI partition?

I have Windows 10, so I have EFI partition, but during Ubuntu installation I forgot to select EFI partition. Now I always should to turn on UEFI mode if I wanna to use Windows. Can I enable EFI ...
1
vote
1answer
37 views

How would I go about dual booting KALI with UBUNTU

I have a USB drive with 8GB plugged into my port for about 3 hours trying to figure out how I go about dual booting Kali onto my Ubuntu. Yes, that is crazy. using ubuntu 14.04 LTS as current OS ...
0
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0answers
79 views

Dual Boot Ubuntu & Kali Linux

I have the following problem: I have a USB Flash drive on which I have 4 partitions. The first, a windows accessible fat32 partition, the a second partition on which I have Kali Linux, on the third ...
0
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0answers
28 views

Can someone help with the boot report?

I'm having problems booting Ubuntu on my Toshiba Satelite laptop. Before I had Windows 10 and never had problems with boot. I ran the USB-Live with Ubuntu, installed Ubuntu but now can't boot from my ...
0
votes
2answers
167 views

WIndows 8 stopped booting

I have installed Ubuntu 14.04 on a laptop which came with Windows 8 installed. It was working fine for almost a year and I was able to boot Ubuntu and Windows from grub screen but from few days ...
0
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0answers
211 views

No option to Install Ubuntu 15.10 alongside Windows 10

I am having a problem with installing Ubuntu alongside Windows 10. I do have a basic disk, so that is not the problem. I also booted into the installer from a USB in Windows Advanced Startup. Before ...
0
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2answers
155 views

Why showing two vmlinuz and initrd.img in update-grub?

shady@shady:~$ sudo update-grub Generating grub configuration file ... Found linux image: /boot/vmlinuz-3.13.0-76-generic Found initrd image: /boot/initrd.img-3.13.0-76-generic Found linux image: /...
0
votes
2answers
416 views

Package errors on every install

SO I just installed Ubuntu 15.10 on my mid-2014 Macbook Pro Retina as a standalone partition. Everything works fine and every applications I installed are working too, but I still get a few errors ...
1
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1answer
244 views

Can't remove or install kernel

I accidentally deleted my /boot partition but I was able to get it back with grub-install I'm trying to chroot and install the kernels again via this guide:How to restore a system after accidentally ...
1
vote
2answers
307 views

How to totally remove ubuntu from boot menu after Windows dual boot

I dual booted windows 10 and ubuntu. Now, I don't want the Ubuntu. So I deleted the ubuntu partitions. Next, I used the Windows recovery drive to run bootrec.exe /fixmbr in cmd.So If I power my pc now,...
0
votes
0answers
162 views

Can't boot form USB in UEFI

I have an HP envy dv6 Notebook (windows 10) and I can't load from my usb. The usb works, I tried on others computers, I already changed the boot order. I tried in both ways, efi and legacy, but the ...
0
votes
2answers
30 views

the efi boot order keeps being forgotten

I installed Kubuntu a few days ago, and I have in a partition alongside windows (all UEFI). Right now if I boot the computer the windows boot loader starts and Windows starts, so to start ubuntu I ...
0
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0answers
110 views

Cisco UCS and Ubuntu

I'm attempting to install Ubuntu 14.04 iso found here http://www.ubuntu.com/certification/hardware/201512-20310/ onto a couple Cisco UCS C220 M4 chassis. The installation happens flawlessly and ...
1
vote
1answer
137 views

Installed to external drive, Grub using wrong architecture

I installed Lubuntu on a flash drive as you would an HD (not live/squashfs). But whenever I boot it I get a grub rescue prompt. It says it can't find /boot/grub/i386-pc/normal.mod which explains the ...
0
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1answer
75 views

linux mac single boot efi question

Linux noobie here.. i have a couple of things going..i have successfully loaded linux on my 2010 mbp. using this process:http://heeris.id.au/2014/ubuntu-plus-mac-pure-efi-boot/ it went very smooth. ...
0
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0answers
154 views

How to recover ubuntu after converting MBR to GPT?

I have converted disk partition table from MBR to GPT using disk AOMEI Partition Assistant Professional Edition from Windows in consequence I lost grub and therefore Ubuntu from booting though Windows ...
0
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0answers
94 views

how to move/create efi and grub to second drive (boot-repair)?

I used to have a Windows 8 / Ubuntu dualboot with Windows installed on a ssd and Ubuntu installed on a hdd - the efi partiton lies on the ssd. Now i want to use the ssd otherwise and just want to use ...