GRUB2 is the next generation of the GRand Unified Bootloader (GRUB). Ubuntu has used GRUB2 as the boot loader since 9.10 (Karmic Koala). Commonly referred to as simply "GRUB".

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“Invalid Magic Number” after updating kernel post-install

After selecting Ubuntu from the GRUB menu, I immediately get an error as the title describes. The only line before this is about loading the ramdisk (I can take a picture and post it to Imgur or ...
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23 views

Failed Ubuntu dual-boot installation - GRUB errors

I've been unsuccessfully trying to install Kubuntu 16.04 on my new laptop alongside W10, which it came in with. Now I did this twice already on different computers and was always successful and there ...
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17 views

Freezes when installing grub2

I tried to install Linux Mint or Ubuntu on a lenovo Q180, it freezes when installing grub2. Used a live usb stick to install it. I was told to "rewrite the mbr" to fix the problem. Trying so I ...
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18 views

Xorg conflict with grub on 16.04

I'm running a new install of Ubuntu 16.04. I have a Nvidia GTX 960m. The Nvidia drivers from their site and from the Ubuntu repos both cause me problems (not the least of which being blurry lines ...
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0answers
31 views

Finding out where grub writes boot order on disk?

I'm trying to find where grub writes the locations of the boot order at in the disk. What I'm trying to do is to modify the place in memory where the BIOS decide where to boot to first. I have ...
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39 views

GParted - what about partition (Windows 7 + Ubuntu, UEFI)

I'll format my HDD and I'll install Windows 7. Which partition must I delete? Do I delete all partitions and install Windows 7? What about sda1 and sda2? I'll install Ubuntu or another Linux ...
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1answer
38 views

How to restore my superblocks?

harrydevries@harrydevries-410-100nd:~$ LC_ALL=C sudo fdisk -l WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sda: 1000.2 ...
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51 views

Windows 10 “upgrade” trashed grub

I just "upgraded" from Windows 7 to Windows 10. In the process, it broke came up in grub rescue, so I loaded Boot-Repair and did the recommended repair. Now instead of booting into grub, it just boots ...
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12 views

System is not booted up after Ubuntu 14.04 Installation

I have installed Ubuntu 14.04 LTS through network controller on my Machine and installation is successful. After installation, the machine got rebooted then it never comes up. If i press ESC key on ...
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12 views

How to dual boot ubuntu with windows 8.1 [duplicate]

I have preinstalled Windows 8.1. But After installing Ubuntu 14.04, When starting up the computer, it now goes straight to Windows, without giving me the option of booting Ubuntu. How can I get ...
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22 views

I had dual boot ubuntu on windows 10

I had dual boot ubuntu on laptop which already had windows 10 installed. Ubuntu had installed correctly and grub loader screen had come. it shows options for ubuntu and windows. windows options works ...
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34 views

Cant access Windows Dual boot

I can't access Windows 10 although at boot screen there is an option. If I choose Windows there is a purple screen and freezes there. I did boot repair but still the same. I don't know what I ...
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2answers
100 views

Grub problems on dual boot windows 10 / ubuntu 16.04 laptop using samsung 950 pro ssd's

I have been googling like crazy to solve this issue and most of the posted solutions have failed. I am trying to dual boot an Alienware 17 R3 computer that came with Windows 10 preinstalled on a 1TB ...
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1answer
105 views

After installing Ubuntu 16.04LTS restart leads to Error: Grub Rescue screen

Two days ago I got a Install/Live DVD of Ubuntu. After Installing it the first time and restarting the computer I was hit with a "error: file '/boot/grub/i386-pv/normal.mod' not found." screen and ...
1
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1answer
68 views

IS there any way to force UBUNTU to install in BIOS Boot mode?

I have a NON-UEFI laptop. However UBUNTU keeps detecting and wanting to install UEFI. Obviously the system never boots if I allow it to install in UEFI mode. Once a UEFI partition and installation has ...
3
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2answers
59 views

How to boot to grub by default?

My laptop normally shows the GRUB boot menu with options to boot to Ubuntu or with windows boot manager. I pressed escape by accident and then typed in exit in the GRUB command line. Then I pressed ...
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23 views

Grub boot error on cloned virtual machine

While using virt-manager and connected to a Qemu/KVM Hypervisor, I cloned a virtual machine of an Ubuntu server installation, version 16.0.4 if it matters. When I try to boot the cloned virtual ...
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20 views

after stopping update on ubuntu14.04 grub console appears on boot

I have DELL laptop and i have installed ubuntu14.04 when I start , it was asking for system update and after 75% update, internet has been disconnected and all updates stops. now when I restart the ...
3
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1answer
116 views

Kernel load module error during boot up

I'm using ubuntu 15.10 on a dell laptop. It works fine but recently I've been getting slow boot times (~1 minute). So I was looking around and when I read the /var/log/boot.log file, I see the ...
3
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2answers
47 views

Grub doesn't recognize Windows 8

I have set up Ubuntu using this guide. Everything worked completely fine, but Grub wouldn't show Windows 8 in it's menu. So I googled a solution, and found+used boot-repair. Even after the fix, ...
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23 views

Lenovo Think Pad never boots up with Linux( Ubuntu)

I bought a Lenovo think-pad and installed Ubuntu. It came by default with Windows 8. I booted him from USB with linux and wiped off windows. I did some coding on the machine, every thing went well ...
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0answers
35 views

Can not Turn Off PC

After a few days of using dual boot of Windows + Ubuntu, there are problems when I shutdown the PC. Both windows and ubuntu cannot shutdown the PC correctly. In Windows (as comparison), when I do ...
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22 views

Single-boot and drive caddy

I just installed 16.04 LTS on my laptop. Right now, I have two HD drive. The main one (sda), where I have installed Ubuntu. And the other one (in the drive caddy), just for data storage (sdc). I ...
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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 ...
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2answers
41 views

Computer not booting after update installed!

My Ubuntu 16.04 was working fine until it got updated to the "latest version". Now the whole machine is just conked up. It is just conked up. It shows the following : Scanning for Btrfs filesystems ...
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1answer
36 views

Lost Windows during re-installation of Ubuntu [duplicate]

I am using HP ac-15 129tx I was using it in dual boot mode with Windows 10 and Ubuntu 16.04. While experimenting with Ubuntu, I broke it (I was trying to change the ownership of the disk and later ...
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60 views

How to merge GRUB with Windows loader

My system has Windows 7 pre-installed, I later created a new partition and install Ubuntu 14.04, recently I just install Windows 10 in another partition. Everything went fine except that GRUB ...
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0answers
24 views

Computer boots into a black screen after I made changes in Ubuntu [duplicate]

I'm a Linux noob currently duel booting Ubuntu with OSX on a 2010 Mac Pro with a 2.4 GHz Intel Core 2 Duo processor and a NVIDIA GeFORCE 320m graphics card. I do not have a boot manager, my system ...
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2answers
20 views

Grub takes 45 Secs to show boot menu

since some time I have a problem with grub. After the post screen at computer startup I get a black screen for about 45 seconds till the boot menu shows up. After selecting the system to boot ...
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1answer
50 views

Dual booting 16.04 and Window 10 with Raid 0

I have a Fake RAID (ASRock Z77 extreme 4 MB Intel based raid 0.) I have windows installed on a Raid 0 drive consisting of four 120 GB SSDs. I would like to dual boot Ubuntu 16.04 and Windows 10 (UEFI)....
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1answer
37 views

Ubuntu MATE: Unable to access GRUB menu

I'm using Ubuntu MATE 16.04 on a ThinkPad X200. For some reason, I'm unable to access the GRUB menu at startup. When I hit shift immediately after the startup screen, GRUB loading (or something like ...
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1answer
20 views

update-grub2 creates config for wrong boot hdd

My 16.04 runs with 3 SSDs/HDD. Ubuntu recognizes its own SSD as /dev/sdc and I guess therefore creates my /boot/grub/grub.cnf with update-grub2 as follows: set root='hd2,msdos5' if [ x$...
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1answer
58 views

Can I remove Windows Boot Manager from dedicated Ubuntu computer?

It appears that I stopped my Ubuntu-based system in mid-update. It later wouldn't boot. Through the use of this excellent resource: Grub2/Troubleshooting I got my system running again after running ...
3
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1answer
61 views

sudo update-grub doesn't work

When I run sudo update-grub, I get the below error: /usr/sbin/grub-mkconfig: 2: /etc/default/grub: /boot/grub/grub.cfg.: not found I have checked and can confirm that the /boot/grub/grub.cfg file ...
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0answers
30 views

Grub not showing on boot. Windows 10 and ubuntu dual-boot not working

I am using HP Pavilion 15 Notebook. It came with a Windows 8 and then I have now installed windows 10 on it(not upgrade). I deleted all the partitions i had and installed windows. After that, I ...
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0answers
19 views

Unknown filesystem after boot

when I turn on my notebook lenovo G580, its write unknown filesystem, its the same problem as this: http://stackoverflow.com/questions/34393502/windows-7-boot-error-unknown-filesystem-after-deleting-...
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2answers
90 views

Dell PowerEdge T20 won't reboot

I have a Dell PowerEdge T20 microserver running Ubuntu 16.04. Everything is working fine, except that it won't reboot cleanly. When I issue run the reboot command, the last messages displayed are ...
1
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1answer
42 views

What is the UEFI boot flow for Ubuntu?

I've read https://help.ubuntu.com/community/UEFI but I'm still puzzled with the flow of boot process in UEFI mode for Ubuntu. I understand that the first step is UEFI firmware will load bootx64.efi ...
0
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0answers
20 views

Ubuntu fails to boot when installed on msata ssd with an hdd plugged in

I have a lenovo y400 laptop. I have added a 250gb msata ssd with the existing 500gb hdd. The ssd has both windows 10 and and ubuntu 16. With the hdd plugged in, a blank screen is shown instead of boot ...
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41 views

Create a bootable USB drive for Mac AND PC

i have an USB Stick with a Ubuntu installation on it, so it is not a Live Boot USB Stick. I want to boot that stick (its using GRUB & non-GPT Table) on PC's with EFI/BIOS and on macbooks with EFI. ...
0
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1answer
64 views

Install Ubuntu 16.04 alongside windows 8

I have windows 8.1 installed on my PC which uses UEFI boot. I want to install Ubuntu 16.04 So I have create bootable USB with Ubuntu 16.04 and installed it successfully. and grub bootloader now is ...
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22 views

Windows bootloader from efi delete grub always

I have a problem. I have two HDD one with windows and one with ubuntu. I'm not able to install windows without efi because the installer doesn't boot up so i have windows with the efi bootloader ...
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0answers
21 views

Ubuntu isn't detected, but it's freshly installed. No other os

Sorry for my bad english. My ubuntu installation isn't detected anymore by uefi bios after i booted the live cd, opened gparted and run a check. Why? Also, i tried reinstalling grub and it can see my ...
1
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1answer
32 views

Re-enabling Grub 2 entry after having removed it with grub-customize

At the beginning my computer was equipped with Windows 10 that was installed on a SSD C:/ and had it's data on a 1 Tb D:/ . I've installed Ubuntu 16.04 64bits on the D:/ hardrive. I then changed the ...
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0answers
18 views

Not getting Windows 10 OS option in grub menu of ubuntu 16.04 LTS

Please help I need it because it has all my important files. Boot Info Script cfd9efe + Boot-Repair extra info [Boot-Info 26Apr2016] Boot Info Summary: =============================== => ...
0
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0answers
15 views

How do I find in which partition I have to install Grub?

I am constantly getting grub-iny/dev/SDA failed whenever I tried to install Ubuntu on my windows 10 UEFI with dual boot. I've tried running command grub-installation /dev/sda2 but I get error saying ...
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0answers
22 views

How to enable dual boot from 2 disks?

I installed the latest Ubuntu on a lenovo laptop with a 128GB SSD on /dev/sdb. After the installation, I added a new disk with windows 7 on it. Ubuntu recognizes it as /dev/sda. How can I make the ...
0
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1answer
17 views

Grub theme file location

Where should I place a grub theme file? I read grub manual and didn't find anything about exact folder to place it in.
0
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1answer
49 views

Fatal error : grub installation /dev/SDA failed

I am trying to install Ubuntu from past 3 days and constantly getting the above mentioned error. I have windows 10 with UEFI and want to dual boot it with windows using Ubuntu image in USB. For the ...
0
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1answer
39 views

How to extend my Linux partition?

I'm currently having a problem with reallocating partitions. I want to take some of Windows' space and give it to the Ubuntu partition. This is my partition list at the moment My partition map: ...