Questions about the bootup process in Ubuntu. Use this tag if you have trouble booting Ubuntu or you have questions about the bootup process.

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10
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2answers
12k views

Grub gives messages about the boot sector being used by other software. What should I do?

This only happens with one of my computers. It is an elderly laptop that has had a long and varied history with several operating systems, but in its retirement it is acting as a server for my home ...
10
votes
2answers
9k views

Ubuntu Live USB won't boot, “Failed to load COM32 file menu.c32”

I'm hoping to revive an old netbook I have laying around by installing Linux on it. I did what I gather most of us are supposed to do: I created a Xubuntu 14.10 Live USB with Unetbootin, plugged the ...
10
votes
4answers
40k views

Ubuntu hangs at purple screen

I installed Ubuntu 11.10 today. After the reboot I selected Ubuntu and it kept hanging at the purple screen. No error message was shown. The liveCD went fine and the installation was successful. I ...
10
votes
3answers
6k views

How do I schedule waking up from hibernation?

Is it possible to wake up Ubuntu from hibernation at a predefined time? It should not be WOL, but rather Ubuntu waking itself up. For example, it should do what the app WakeupOnStandBy does on MS ...
10
votes
3answers
1k views

How can I make a live CD/DVD from my harddisk installation?

How can I make a live CD/DVD from my harddisk installation? In other words, I would like to create a boot CD from Ubuntu that is installed on my PC, because I want to include the updated packages in ...
10
votes
2answers
540 views

How to create a live system on usb-drive with persistent changes on disk/hdd

I was trying to install Ubuntu live on a USB-drive with persistent changes. However i wanted to write the changes to HDD instead of USB for various reasons (Performance, Space). I found out, that the ...
10
votes
3answers
8k views

How can I repair a system with a deleted kernel?

Because I wanted to get more free space on my HDD, I deleted old kernels (dont ask me why I was so mad.). I accidentally deleted the active kernel too (3.2.0-27 on Ubuntu 12.04). First I couldn't ...
10
votes
2answers
19k views

I get a “serious errors while checking the disk drives for /boot” error while booting

I have just set up my new system by creating three partitions on a whole hard disk (/boot, /home, swap and /). I saw this article and now I am getting those errors and the system provide me with some ...
10
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2answers
2k views

Error saying “unable to update ICE authority” while booting

I often get an error saying unable to update ICE authority. Is there a way out of this?
10
votes
2answers
13k views

How can I change the purple background color of Ubuntu plymouth boot screen?

I'd like to change the background color of the purple plymouth boot splash to another color, how can I do this?
10
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3answers
3k views

Ubuntu shows 'Kubuntu' on boot

I recently updated my Ubuntu 12.10 setup to 13.04 using sudo do-release-upgrade. After going through the process and rebooting, I was a little confused by the GRUB menu showing a "Kubuntu" option ...
10
votes
3answers
59k views

Dual boot windows 8 and Ubuntu with Windows 8 Boot manager

I have two partitions on my hard-didk , I have installed ubuntu on my 1st partition and windows 8 later on another partition.Now i can only boot into windows 8 because it doesn't recognize Ubuntu. ...
10
votes
3answers
13k views

Howto run Ubuntu with UEFI and Intel Smart Response Technology

This question has NOT been answered by the following due to them saying to permanently disabling these features Installing Ubuntu on a Pre-Installed UEFI Supported Windows 8 system Install ubuntu on ...
10
votes
3answers
1k views

My boot time has increased by 25% in the past two months. How do I reduce it?

I used to have a boot time of ~35 seconds till 2-3 months back. Now it is about ~50 seconds or more. Shut down time has also doubled. Before it used to be at most 5 seconds. Now it is at-least 10 ...
10
votes
4answers
8k views

Why does Ubuntu 11.10 start and shut down so slowly?

Ubuntu's always been very fast on my computer. I have 3GB RAM, and previous versions booted in under 40s and shut down in under 5s. Most recently, Natty took 40s to boot and only 4s to shut down. ...
10
votes
0answers
11k views

How to free up space on /boot? [duplicate]

Possible Duplicate: Free up more space on /boot I logged onto my server today to find the message: => /boot is using 98.9% of 91MB When I look at /boot I see that it is indeed very ...
9
votes
4answers
48k views

How to restore Windows 7 MBR without a CD

I have been playing with Ubuntu for a few weeks now, and I'd like to revert my computer back to it's original - factory - defaults. On the computer I have a recovery partition (it's a netbook). I ...
9
votes
5answers
37k views

Configure Dual Boot, Windows 7 and Ubuntu 12.04 with or without EFI

I have just installed Ubuntu 12.04 on a laptop with Windows 7 but I don't get to boot from Ubuntu. First, during the installation I made these partitions (may be too many): /dev/sda1 FAT32 SYSTEM ...
9
votes
2answers
6k views

15.04 - very slow boot

After upgrading to 15.04 , one computer is very, very slow to boot -several minutes, instead of ~20sec. I do not know if this helps: graphical.target @1min 40.961s └─multi-user.target @1min 40.961s ...
9
votes
1answer
981 views

Accidently deleted my /etc/default folder

I Accidently deleted my /etc/default folder. Now my computer wont boot. Its running Ubuntu 14.04 LTS. Upon boot it says, Filesystem check or mount failed. A maintenance shell will now be ...
9
votes
2answers
133k views

How do you run update-grub?

I went into Live CD and activated Terminal. Then, I typed gksu nautilus to gain temporary access to my root directory. Once the Manager window opened, I clicked on File System and navigated to the ...
9
votes
2answers
1k views

How can I remove a mainline kernel and move back to a supported kernel?

I recently upgraded to kernel 3.4 in my Ubuntu 12.04. After that the computer is not booting up. So I used a previous kernel to boot up. Actually I don't want 3.4 kernel. So how can I remove it and ...
9
votes
2answers
10k views

Need to move my swap partition to let my root partition grow. How?

I have a Virtual Box Ubuntu guest and i need to have more space on my disk (actually it's 8 gb). I have already increased the space allocated for the VDI to 16 gb. Now with GParted Live i'm trying ...
9
votes
2answers
8k views

What is the difference between initrd and initramfs?

I would like to know, what is the difference between initrd and initramfs? Thanks, Sen
9
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2answers
21k views

ALERT! /dev/disk/by-uuid/xxxxxxxxx does not exist. Dropping to a shell

I am using Ubuntu 14.04. On 23 August 2014 I ran in terminal sudo apt-get update. Then I rebooted the system. And now I see: ALERT! /dev/disk/by-uuid/xxxxxxxxx does not exist. Dropping to a shell ...
9
votes
1answer
6k views

Boot failure: failed: command IDENTIFY PACKET DEVICE

Trying to install from CD desktop image and getting: ata8.00: exception Emask 0x52 Sact 0x0 SErr 0xffffffff action 0xe frozen ata8: SError: { blah blah } ata8.00: failed command: IDENTIFY PACKET ...
9
votes
4answers
4k views

Replacing Windows with Linux Ubuntu 12.04 LTS

I am working on the best way to eliminate Windows XP from my older desktop and replace it with Linux Ubuntu 12.04 LTS as my sole operating system. I've done a dual boot alongside Windows to get used ...
9
votes
6answers
50k views

System won't boot with nvidia driver enabled

I just tried to upgrade Ubuntu 11.04 to 11.10, but without success. I took a picture of what the screen are showing when i try to boot: If i use recovery mode -> resume, it works. Normal boot ...
9
votes
3answers
3k views

Optimizing Boot-up

I installed bootchart to monitor my boot-up process. I had some problems with my booting time (>80sec) Before : http://i.stack.imgur.com/4tvky.png After some tweaking with Bum,Ubuntu-tweak and ...
9
votes
1answer
49k views

Xorg server configuration fail - no screens detected

I have a serious problem with Xorg server on ubuntu 12.04 (with nvidia 420M GT card). At home I am using an external monitor connected to my laptop's HDMI port - the external display is used as ...
9
votes
3answers
49k views

Cannot boot because: Kernel panic - not syncing: Attempted to kill init!

This is what I've got. I cannot boot and I see the two of three little lights on the keyboard blinking all the time and the cooling is working on full power, almost. I saw in other askubuntu topic ...
9
votes
1answer
7k views

Why do I get “init: failed to create pty…” errors on boot?

I've installed Ubuntu 12.04 yesterday with a LiveUSB. I had problems at booting, so I had to repair grub, and it was ok. But now when I start up my pc, I get the error message 'init: failed to create ...
9
votes
4answers
4k views

How can I use my own image for the boot splash screen?

How can I create and use my own boot splash screen?
9
votes
2answers
3k views

Black screen during boot after TTY1 login

I've got a weeks-young install of 13.04 (3.8.0.29) and the computer has been powered on for a week. I turned it off for the night and now it freezes during boot. I have already checked this ...
9
votes
3answers
40k views

Booting Ubuntu 12.04 with “acpi=off” grub parameter

In order for me to boot into 12.04, I have to add the parameter acpi=off in grub. Any other options as specified here do not allow me to boot into Ubuntu. My question is simple, what does setting ...
9
votes
1answer
10k views

What happens if I disable and unistall Plymouth?

I have this problem with Plymouth, in wich it doesn't show up or, when it shows, with a awful resolution. So, I wanted to uninstall Plymouth ( I found the package in Synaptics). I'm using Ubuntu ...
9
votes
2answers
1k views

How to recover unbootable system?

I have just run the most recent set of recommended updates on a 10.10 system. The computer is now un-bootable. It gets as far as the "Ubuntu..." splash and then does nothing. I cannot switch to a ...
9
votes
1answer
194 views

Is it OK to delete the /boot/initrd.img file on a running system

I have a server with a RAID1 root partition, but it has a small partition for /boot on each of the two drives: I 'dd' one to the other whenever an update is made. Unfortunately the /boot partition is ...
9
votes
2answers
856 views

Resizing boot partition with full disk encryption

I have seen the answers to the general question regarding resizing the boot partition. In my case, I have installed Ubuntu 12.04 Alternate with full disk encryption. Since the drive can not be ...
9
votes
4answers
2k views

How do I boot Ubuntu from the network without installing?

The scenario: At work I have to shred data on old PCs (not my main responsibility). What I do is I boot from the Live-CD, choose Try Ubuntu, open the terminal and sudo shred -v -n10 /dev/sda. This way ...
9
votes
1answer
1k views

How can I improve my boot time? (bootchart and dmesg output included)

I've noticed that my boot time lately has been unusually slow. I am running 12.04 a laptop with a 2.40GHz CPU and 4GB of RAM. I've run bootchart and dmesg, but I'm not sure how to use them to address ...
9
votes
1answer
2k views

Crazy boot and reboot times after upgrading to ubuntu 15.04 (a stop/start job is running for session c2)

After upgrade to 15.04 my ubuntu loads really slowly, slower than Windows 8 on the same machine, which insults me. I turned off splash screen, and when I boot the system I get this: A start job is ...
8
votes
7answers
15k views

How to verify that the ISO I downloaded is bootable before I burn it?

How can I check to make sure that the iso I downloaded is bootable, before I burn it?
8
votes
5answers
1k views

Will plymouth allow for a nice boot experience with proprietary graphics drivers in future?

The new graphical bootloader introduced in 10.04 (plymouth) looks amazing until I enable proprietary drivers for my video card. I then get a horrible flashy monster of a boot experience, which I can ...
8
votes
6answers
11k views

How can I tell linux kernel to completely ignore a disk as if it was not even connected?

Notice Please scroll down for the answer (it has few points but it is the correct one). The problem is solved by a patch that will be in kernel 3.12.7 and up; I hope it will back-ported to earlier ...
8
votes
3answers
8k views

How can I show all kernels in the Grub2 menu, ie disable submenu (“Previous Linux Versions”)?

Is there an easy way to disable Grub2 new submenu structure? I'd like to have back the old structure (each option as a menuentry) where each kernel is visible and selectable on the fly. I've already ...
8
votes
3answers
15k views

Error “fixing recursive fault but reboot is needed”

I am trying to install ubuntu for the first time. (long time windows user, first time linux!) Version = 11.04 Hardware = Acer Travelmate 4050 I can boot from USB or CD and it loads fine I have ...
8
votes
7answers
1k views

Is it possible to run my Ubuntu install from within my Windows Install?

I have Windows XP and Ubuntu installed on separate partitions. Is it possible to "boot" my Ubuntu install from within Windows? What I am looking for is something similar to a Virtual Machine, but ...
8
votes
4answers
36k views

How do I bring up my wireless network at boot?

I am running Ubuntu Server 12.04. I have a wireless USB card. When I begin the boot process I see: Waiting for network configuration It turns out that the network never comes up. But once I get to ...
8
votes
2answers
13k views

Purple start screen - no splash screen

After installing Ubuntu 11.10 on a new computer everything worked fine for a few weeks and now suddenly when starting up Ubuntu I get a blank purple screen with no "Ubuntu" splash and the 5 dots but ...