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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error: unknown file system entering rescue mode

Hi all i really want help with a pc running ubuntu 14.04 LTS only from 2 days ago and its stuck on GRUB RESCUE and i tried a lot of things that i found on the web and nothing work for me...like i ...
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Boot ISO file via GRUB2

I'm migrating my multiboot USB drive from syslinux+grub to grub2. I'm now searching a way to boot my ISO files. I'm searching for a chainload method. So I don't want to add kernel and initrd ...
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loopback module for grub with secure boot

I am building a multi-boot usb stick with ubuntu derivatives. I followed several tutorials found online: essentially, you put the isos on a usb stick and then you boot them using grub, which is ...
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17 views

Ubuntu won't boot after installing on MacBook Pro 6,2?

I installed Ubuntu Trusty Tahr(14.04) on my MacBook Pro 6,2. But, after installing all the updates, and restarting, I can't boot anymore. I installed The rEFInd Boot Manager, on my MacBook. At boot ...
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23 views

ASUS X555LN Brightness fn key not working in Ubuntu 14.04

I have installed Ubuntu 14.04 on my ASUS X555L Laptop using an nVidia GeForce 520M Graphics card. The fn+f5/f6 keys are unable to adjust brightness. Currently my screen brightness level is maximum. My ...
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Keyboard will not work for encrypted login

I'm running Ubuntu 15.04 (Ubuntu gnome). When I start the computer, it shows the gnome logo and asks to enter my encrypted password to unlock the disk. However, I cannot enter the password. Nothing ...
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11 views

How to choose which OS to start in dual boot with Touch Screen and no physical keyboard?

I (now) own an HP Slate 2(b2a28ut) which it's a fancy piece of technological art. It does look like a tablet itself and it acts like an Android Tablet because of its Capacitive Touch Screen, but it is ...
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Ubuntu 14.04 on is not booting, bootmgr is missing, press ctrl + alt + del to restart

My system refuses to boot normally from the SSD, I tried to run boot-repair from a USB, after reboot the problem persist, here's the Boot repair info script Boot Info Script e7fc706 + Boot-Repair ...
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6 views

How to get out of grub after failed update, WITHOUT a cd reader

I tried to install the new version of ubuntu. It took a long time and i let it go on while i slept. When i woke up there was a black screen with commands saying something about the battery. I tried ...
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13 views

Everything except GUI is black

Since I installed Ubuntu 14.04 on my laptop, I have many problems on it (that I don't have on Debian 8) Indeed, when I switch to TTY with CTRL + ALT + F(1-6), I get a black screen, same problem when ...
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grub2 not working, showing purple screen after selecting ubuntu or windows

grub2 wont boot anytithing, it just shows purple screen after i select windows or ubuntu but when i install grub legacy ubuntu works perfectly but i cant add windows 8 to grub legacy. Any help is ...
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21 views

Can't Boot Ubuntu 14.04 after software updates

I installed Ubuntu 14.04 into my per-installed windows 8 computer and uses dual-booting for a wile with out any problem. Three days ago Ubuntu flagged me with some software updates and I let to ...
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2answers
24 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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16 views

What is the kernel command line to completely disable bluetooth in /etc/default/grub?

What is the kernel command line to completely disable bluetooth in /etc/default/grub? I need 25 characters to ask such a simple question because of "quality standards"?
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19 views

How to add windows 8 to Grub 2

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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16 views

Error Booting to Windows after removing Ubuntu

I wanted to remove Ubuntu to reorganize my hard disk, I deleted Ubuntu partition then I run this command in Windows repair "bootrec.exe /fixmbr" but when my Laptop boots it shows a screen says ...
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24 views

Problem with Multiboot and Grub

Sry for my Bad English, I am from Germany:D My Problem is that my Grub bootloader had a problem a few days ago,I couldn't change the options with Grub Customizer or anything. It says that a file is ...
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29 views

Operation System not found after installing Ubuntu 15.04

I had my perfectly working Dell XPS with several ubuntu based distros installed on it (ubuntu 14.04, 15.04 and elementary luna and freya) Then I tried antergos and installed it to one partition. ...
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22 views

Black screen with white underscore not starting and no option for reboot

After installation from bootable USB it worked well, but when restarted after some time,this black screen occured. Any fixes for this? And the purple screen also doesn't come. It only stops at the ...
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21 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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3answers
37 views

Old kernel version still running after several updates

Currently running 3.11.0-18, but many other later versions are installed. For some reason the updates aren't getting selected for grub: $ uname -r 3.11.0-18-generic Listing kernels: $ sudo ...
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2answers
21 views

Windows gone and ubuntu not working [duplicate]

I installed ubuntu alongside windows 8.1 and i installed correctly by creating partitions and the laptop finally says restart to use ubuntu but when i do , it agains diplays a gnu grub version showing ...
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22 views

Windowse/Ubuntu dual-boot disk separation

I have a HDD and an SSD. I have a win8 and Ubuntu in two separate partitions on my SSD. First win8 has been installed and then Ubuntu. Boot-loader grub comes up and I can select my OS. Now, I feel ...
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18 views

Sound is gone after booting system in text mode

I started using GRUB_CMDLINE_LINUX_DEFAULT="text" grub argument for my boots, and recently noticed that the sound is missing. I start GUI from terminal using startx command, here's my .xinitrc ...
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1answer
23 views

getting issue when booting system in Ubuntu 14 in laptop

I am getting these kind of errors when booting system: READ FPDMA QUEUED (DRDY ERR) READ DMA EXT What I need to do for this? Is this HDD issue? I should replace it with new HDD?
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Boot Live CD from HDD and unlock HDD

I boot Live CD from HDD with following grub menu item menuentry "Ubuntu 14.04 ISO" { set isofile="/boot/iso/ubuntu-14.04.1-desktop-amd64.iso" loopback loop (hd0,5)$isofile linux ...
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1answer
13 views

grub(violet screen) did'nt apppear

previously i had windows 7 and windows xp.I formatted the drive containing windows xp .i installed ubuntu 15.04 through USB and allocated the previously formatted drive to it.ubuntu installed ...
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Error: no such device after removing ZorinOS (Ubuntu based) on Second hardrive [on hold]

I had windows on my first hard drive and then installed ZorinOS (Ubuntu based) on my second hard drive. I removed it like Zorin said but now I get the No such device error no matter which drive I boot ...
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2answers
45 views

Brand new to Ubuntu - can't get into recovery mode

After a mistake, I changed my password but can't remember it now. I've found out that you can reset it by going into recovery mode, but I can't seem to get there! I have Ubuntu 14.04.2 running ...
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14 views

Keyboard is not working on PC with Ubuntu

I have a Toshiba laptop running Ubuntu. I got it from my friend that way. I don't know much about Ubuntu. It look nice and stuff but the laptop keyboard is not working on it. When i click the caps ...
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1answer
20 views

Backup live server, migrate to new hard drive (simulating recovery from hard drive failure)

Goal: to take image of live system, transfer to new drive (from MBR, to GPT), separate /boot from / partition, and not have to go through tedious system re-install and re-configure from fresh. ...
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19 views

The “default” kernel isn't referenced in the “grub.cfg”?

I've set the GRUB_DEFAULT value in the /etc/default/grub file to a string Ubuntu, with Linux 3.10.0-customized and run the update-grub after that. Then I looked at the /boot/grub/grub.cfg script to ...
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23 views

after installation problem with ubuntu booting

I had completed my dual installation of Ubuntu using wubi with Windows 8.1 using a live USB and it displayed the message to restart and remove the USB but after completion too the boot manager is not ...
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1answer
31 views

I changed the permission for /etc folder. Sudo is not working after that

I changed the permission for /etc folder to 777 with chmod. When I try to run Sudo after that it refuses to work. I found a few fix, such as going to recovery mode to fix things but recovery mode is ...
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1answer
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Can I take off completely erase Ubuntu and reinstall Windows 7 [duplicate]

I have looked just about everywhere, and I can't find an answer. I absolutely hate Ubuntu. It's messing everything up on my computer. I want to completely take off everything and reinstall windows. ...
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Xubuntu never boots up for first time

I've installed Xubuntu on SSD drive, I can see it in GRUB but it never boots up for a first time. When I select "Ubuntu" in bootloader, loading splash-screen appears for a brief moment and then it ...
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9 views

Is it possible to get Grub to automatically detect other OSs at boot-up?

I installed Ubuntu on an external hard drive, no problems, and put the grub boot loader on the hard drive rather than the original computer. When I try to move the hard drive to my other computer, ...
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1answer
32 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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24 views

Grub not showing on startup for Windows 7 Ubuntu 14.04 Dual boot

I had to reinstall windows 7 in my computer which was running in a dual boot with Ubuntu. But now it does not appear the grub menu on boot. I tried to fix the problem following the instructions in the ...
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50 views

Sub-process /usr/bin/dpkg received a segmentation fault

I have corrupted either my /boot partition, dpkg, or both. I was trying to free up space on my /boot by removing old Linux images. Now my machine will not boot. when i try to reinstall Linux-images, ...
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2answers
30 views

Ubuntu boots to “Read Only Filesystem” after Upgrading

I recently upgraded to 15.04, but when my computer restarted it wouldn't boot into gui and said it was a "read only file system" I came across this Ubuntu boots in read-only filesystem after upgrade! ...
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9 views

Ubuntu 12.04 - display unclaimed - can boot only in recovery mode

I can select recovery mode as option then boot normally. This works. But Normal mode doesn't work. the command: sudo lshw -c display results in *-display UNCLAIMED description: VGA ...
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19 views

Need to reset password, can't bring up grub2

I purchased a new dell laptop preloaded with ubuntu 14.04 LTS, and I need to reset my password. However, I can't bring up the grub2 menu to enter recovery mode (holding down shift during boot up does ...
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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
13 views

Windows 7 installed on ubuntu but system not able to boot windows

I have recently installed windows 7 on ubuntu.. This is how I did it- first I made a ntfs partition for my windows 7 installation, then I made a bootable usb from an iso file of windows 7 , and I ...
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Suspend during upgrade to 14.04 caused CORRUPTION

An accidental suspend when my laptop was being upgraded from 12.04 (64bit) -> 14.04 (64bit) has stopped the system from starting up. It gets to GRUB and runs through the startup procedure but stalls. ...
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Install GRUB on the MBR of an HDD inside a Win7 machine

Install GRUB on the MBR of an HDD (non-boot, it's just IN THERE) inside a Win7 machine. It must be very simple. I just failed to successfully google my problem. I dont want dual boot, I dont want to ...
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boot from grub2 to windows 8 [duplicate]

I duel booted my windows 8 with Ubuntu. Ubuntu started to give many errors so I tried to uninstall it by destroying the partition. The problem is that I cannot return to windows 8 because my computer ...
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1answer
11 views

Bootloader/Grub can't boot but recovery works but still can't boot

Hi I have an issue with running ubuntu on sdcard The usb is 8gb and partitioned into : sda1 : 900MB (FAT32) sda5 : 512MB (swap) sda6 : 6GB (EXT4) root Ubuntu 15.04 is already installed. But when I ...
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1answer
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Dell Latitude D400 won't boot because of grub! [closed]

Please could I have some help with getting rid of grub; it stops me from reinstalling windows XP! Please answer! I have no OS.