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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sysctl.conf or grub file for kernel parameters?

As far as I know it is possible to send kernel parameters with both the sysctl.conf and the grub2 configuration files at boot time. If the same parameter is configured using both methods which ...
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92 views

Installed Ubuntu 16.04 server doesnt boot

Today I install Ubuntu server 16.04 64Bit Installation complete, after reboot ubuntu doesnt show grub menu(I install grub loader in installation and write hanges to disc). I reboot again and push ...
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35 views

GRUB - automatically boot Ubuntu, or boot Windows when shift is held (WITHOUT showing the menu)?

Before someone marks it as such, this question is not a duplicate: I'm not only asking how to automatically boot Ubuntu and show GRUB's menu when I hold shift during boot. I want to set up GRUB so ...
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1answer
28 views

Trouble with dual boot Ubuntu and Windows

I recently installed ubuntu 14.04 alongside already existing Windows 10 on my system. After installation, grub was only showing Ubuntu and was not listing Windows as OS on my system. I followed ...
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1answer
50 views

Grub nomodeset and purple screen of death

I changed my grub settings by editing the file /etc/default/grub and adding "nomodeset" + "acpi_backlight=vendor". After the reboot I get stucked in a purple screen in which I can't do nothing. I ...
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55 views

Grub rescue error: Unknown Commands + Unknown FileSystem + Live Usb

I have been given an Asus EEE Pc 1201PN where Ubuntu and Windows 7 used to live in a dual-boot. When running Windows 7, the Ubuntu partition has been erased and thus, Grub is not working anymore when ...
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1answer
51 views

Dual-boot Ubuntu/Windows 7 upgrade to Windows 10 failed

I attempted to upgrade my Windows 7 to Windows 10 on a dual-boot ASUS U56E laptop. After about five hours of download/prep/install, like many other people, I found myself presented with the grub ...
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22 views

Stuck at grub rescue prompt after terminating a windows installation

I recently began the installation process of windows 7 on my Ubuntu machine. When I got to the format option on the Windows OS install prompts, I remembered I had some files on my Ubuntu OS that I ...
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4answers
176 views

grub2: update-grub failed to get canonical path of `none'

$ sudo update-grub /usr/sbin/grub-probe: error: failed to get canonical path of `none'. This is the situation I'm in after an interrupted upgrade from vivid to wily [edit] Further delving into ...
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1answer
27 views

Cannot boot into ubuntu after installing it on to hard drive

I was prompted to reboot after finishing the installing of ubuntu kylin(i have same problem with regular ubuntu) I either boot right into windows or if I remove the usb, I boot from the usb again ...
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1answer
46 views

Grub Rescue prompt appears after deleting Ubuntu partition. Can't boot Windows

I have an HP Pavilion dv 9543 cl. I decided that I wanted to update Win Vista to Win 8 several years ago, but did not know how to remove grub 2, so I naively decided to simply remove the Ubuntu ...
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2answers
81 views

UEFI/legacy issue : Ubuntu alongside Win10

I'm pretty much new on Linux and was planing to make dual-boot for a long time now. My problem basically is that after I installed ubuntu (16.04) alongside my windows 10 it can boot if i set legacy ...
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1answer
43 views

How is /etc/default/grub generated during installation?

I'm currently working on a project that needs kernel boot parameters added during a custom adapted Ubuntu installer (based on 14.04.3). I know that they belong into GRUB_CMDLINE_LINUX_DEFAULT in /...
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1answer
31 views

grub2 can't configure after failed upgrade on raid

I tried to upgrade ubuntu with standard apt-get upgrade and ran into similar problems to what is described here: https://www.webhostingtalk.com/showthread.php?t=1315016 grub went through a ...
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1answer
38 views

Black screen after grub or at reboot with LUKS encryption

I know this subject was already treated, and I found a "fix" to bypass this black screen thanks to this answer (LUKS encyption part): My computer boots to a black screen, what options do I have to fix ...
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0answers
91 views

failed command READ DMA

I have this strange error when I try to install Ubuntu It tries to install during one day to finally success to install Ubuntu probably because of this error. Do you have any idea of what happen? Is ...
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0answers
108 views

Help Ubuntu and Windows won't shutdown

I've decided to install Ubuntu 16.04 along with Windows 10 on my Dell Inspiron 15 3000 Series. Now both OS's can't shut down properly. What is looks like is that all processes are killed during the ...
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1answer
108 views

Windows 10 broken after install Ubuntu

So I was with just windows 10 installed and I installed Ubuntu 16 here and now I can't boot windows 10 here's my paste boot info: http://paste2.org/gMBhJyMp If I check the windows partition with ...
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1answer
80 views

Server 16.04 - Default Grub Boot Option Fails

I'm able to get the server to boot by going into the advanced options and choosing the first option. My question is how can I automate this? Requiring someone to be at the console during the boot ...
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0answers
15 views

Add kernel boot parameter from package

I'm creating my own debian package which has to add a kernel boot parameter when installed in order to work properly. The place to have this is GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub. My ...
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0answers
25 views

Correcting crashing/grub issues with partially failed install

I had issues completing grub installation on an mdadm system with 16.04, and managed to hack it to boot. However now the system intermittently crashes and continually tries and fails to install grub-...
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0answers
59 views

How to Enable Predictable Network Interface Names?

Running Ubuntu 14.04, I've set GRUB_CMDLINE_LINUX_DEFAULT="net.ifnames=1" in /etc/default/grub. I've also removed /etc/udev/rules.d/70-persistent-net.rules and linked /etc/udev/rules.d/75-persistent-...
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20 views

After system updates ubuntu grub no longer boots on dual-boot system [duplicate]

Very new to Ubuntu and not very tech savvy so bare with me. I have been using Ubuntu on a dual-boot system for a couple of months - all fine. I haven't touched windows during this time. I did some ...
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0answers
5 views

fix boot - is it possible whith encrypted disk?

Is it possible to fix boot of encrypted disk ? only the ubuntu partition is encryoted (sda3). These are the partitions: sda1 - efi sda2 - grub sda3 - ubuntu I use removable disk, and just moved it ...
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1answer
35 views

Trouble booting Windows from GRUB [duplicate]

I have a Lenovo Y700 and I installed Ubuntu 16.04 yesterday. I downloaded the iso and installed it in my USB drive using YUMI. I had a problem trying to boot from the USB since it wasn't recognized. I ...
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1answer
19 views

Grub2 broken after editing grub.cfg

In attempting to update the bios on my machine so that it would allow me to utilize all of the installed RAM, I found instructions on adding the option to the GRUB bootloader menu. Since the only ...
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0answers
22 views

grub menu issue after windows 10 update

I recently updated my Windows partition to Windows 10, and it removed the grub menu. I have experienced this before, and there is much online about it. However, I have an issue that I haven't found a ...
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1answer
44 views

Dualboot with 2 seperate harddrives. HD1 has Ubuntu 14.04 HD2 has Windows7

I'm running Ubuntu 14.04 and Windows 7 on my PC, both 64 bit. The way I use it, is to turn off the PC, connect the Ubuntu HD if I want to use Ubuntu. If I want to use Windows, I disconnect the Ubuntu ...
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1answer
134 views

How to turn off the filesystem check message which occures while booting

What I want to achieve: I want to customize my complete boot of my Ubuntu 16.04 LTS installation to show the same wallpaper which is actually on my desktop. What I achieved till now: added the ...
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0answers
20 views

Boot Option during Startup

I have Windows 10 on my HDD, would like to install Ubuntu 16.04 LTS on SSD. During startup, Can I get a screen which shows me the option to "boot from" menu? It is possible to go to BIOS and select ...
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0answers
19 views

Dual Boot: Directly booting to Xubuntu without giving me option to boot Ubuntu MATE

I first installed Xubuntu in my laptop. I then installed Ubuntu MATE choosing the option 'Something else' in the installer to create manual partitions. I created a 60GB space for / and 30GB space for /...
0
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1answer
74 views

GRUB boot loader(Ubuntu) not working after updating

I have a system with ubuntu-14.04.2-desktop-amd64 installed. It has stopped booting up after updating. As I power on it, screen glows for 1 sec and it shuts down. I have tried to open GRUB boot loader ...
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2answers
69 views

unable to boot into windows 10 after ubuntu installation

i have windows 10 loader option in my boot menu but still if i select it the screen just goes blank for 2 seconds and returns to boot menu whereas if i select ubuntu it loads perfectly.... here is my ...
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0answers
16 views

Grub fails “could not find ..” when restarting

I recently installed windows 10 (/dev/sda1)and Ubuntu 16.04 (/dev/sdc1). I set my boot bios to boot from ubuntu and grub recognizances ubuntu and windows fine. The problem is when I restart from ...
3
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1answer
151 views

GRUB shows kernels from previous ubuntu version

I have just updated Ubuntu to 16.04 version and when I boot, grub shows the kernels from the previous Ubuntu version. How can I delete them? (not only in the grub list but to actually free that space ...
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0answers
57 views

Error-2 : End kernel Panic while booting

After running sudo apt-get -f install command at terminal and downloaded about 351 MB of fixes, I restarted Ubuntu 16.04 OS but after selecting "Ubuntu" From Windows Boot Menu (Default OS : Windows 10)...
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0answers
9 views

Ubuntu Desktop Stopped working. GNU Grub comes up instead

I was following along with an online course to learn about setting up a Ubuntu Desktop environment via Virtualbox on a Windows 7 machine. Everything was workiing fine, including getting ruby and rails ...
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1answer
157 views

Boot Option : ACPI=off

acpi=off is the only way to USB Live Ubuntu/Lubuntu, which eventually shows up only 1 processor (for i7 6700HQ), no power option, no brightness control etc. There are couple of people suffering from ...
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39 views

Ubuntu on my tablet fails to boot

This is a challenge. I have a Dell Venue 5050 Pro tablet. I'm use to bios, so trying to get this on my system was fun being a uefi. It has a 64x processor, yet a 32bit uefi menu. I followed this page ...
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0answers
37 views

Ubuntu 14.04 Grub Rescue Mode

Hi I am using dual boot with windows & Ubuntu Server 14.04 as a File server sharing the files with Windows Box using Samba. Now I want to know due to suddenly power failure the Ubuntu unable to ...
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0answers
163 views

PC stuck on motherboard splash screen after Ubuntu 16.04 install

I have a custom PC with the following specs: intel 4570 Gigabyte ga-z87-hd3 motherboard 4x4gb (16gb) RAM intel 730 ssd gtx 760 evga platinum PSU I've been running several operating systems on my ...
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0answers
17 views

How do I get GRUB2 in a virtual machine to see my SD card?

I am running Ubuntu in VMware Player 12. I want to load an SD card that I have attached to the VM. How do I get it to appear in GRUB2's sights?
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0answers
42 views

Can not boot into my windows

I have two drives. One drive has windows 7 and the other has XP. I created an ubuntu live USB-stick with rufus to see if my computer can handle, because it is very old. Specs: Pentium 4 2.8 GHz 2 GB ...
2
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1answer
124 views

Can't boot with linux 4.4.0-22

I've just installed a fresh ubuntu 16.04 and run apt-get upgrade, which apparently resulted in linux 4.4.0-22 being installed. On reboot, after I select ubuntu from the menu (I have Windows installed ...
0
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1answer
57 views

Blacklisting a module only for specific kernel versions?

When I boot a 4.4.x kernel, I want to make sure that the buggy staging driver r8723au is blacklisted, in favor of the much-improved mainline rtl8xxxu. However, when I boot an older 4.2.x kernel, I'll ...
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1answer
24 views

Grub says GRUB GRUB GRUB GRUB

I recently uninstalled Ubuntu to install Ubuntu mate, but when I go to install Ubuntu mate nothing shows up besides GRUB GRUB GRUB GRUB. I was wondering if someone could help. Just to be specific I DO ...
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0answers
38 views

Grub breaks at each update

I have a really really weird boot issue and would like to share with you to see if some of you already encountered it. I have installed Ubuntu 16.04 on my (not so recent) Asus eeePC 1215B. It's the ...
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0answers
34 views

GRUB must be reinstalled after each time I boot from a USB

I have Ubuntu 15.10 installed on my laptop hard drive. I regularly have to boot from a live USB containing another Linux distro. It has to be done this way for security reasons, I cannot dual boot ...
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0answers
29 views

Couldn't install grub2 in ubuntu 14.04

i wanna set up multiple operating system on ubuntu, as a result, that turned out that maybe i need to install grub, yes i did it, but something's going wrong.:( i download the grub package and tar it ...
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0answers
19 views

My laptop won't boot with the latest version of the kernel

I have a Samsung Series 9 ultrabook and after installing the latest version of the Linux kernel I'm greeted with a blank screen after the Grub menu. However if I choose the kernel version 3.13.0.24 ...