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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How to PXE network boot a Ubuntu Server 12.04 using HTTP

I have a task to PXE install Ubuntu servers by HTTP, so I find the tutor in PXEInstallServer and KickstartCompatibility and set my PXE server as it said. Then I open a test client and which can get a ...
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125 views

BGRT Errors on boot - Custom compiled kernel 3.19.3

After compiling my own kernel (yes, I know I'm not entitled to any support), I receive this message on boot: [ 0.077204] Ignoring BGRT: invalid status 0 (expected 1) It disappears after a few ...
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71 views

Plymouth Interrupted during boot

I have installed a plymouth theme on my machine (Ubuntu Gnome 15.04) and before an update to systemd, everything worked. Now even with the kernel parameters as such: quiet loglevel=3 ...
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91 views

Persistent Ubuntu on a USB drive

From the title, my question probably sounds very similar to old questions but as far as I can tell it is not. I've looked through many of those questions and have not found an answer to my complete ...
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44 views

Gaming mouse cause half minute freeze during boot

I just installed Ubuntu 14.04LTS. My USB Corsair M65 Gaming Mouse causes PC to freeze for 30s at login screen. During this time, I cannot type and there is not mouse pointer. The same effect ...
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20 views

Can Linux-burned Installers boot on iMacs?

I know a version of this question has been answered concerning Windows, but I'm looking to burn a Linux installer.iso within Ubuntu on a PC, then boot the installer on my 2006 Intel iMac. The reason ...
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93 views

Ubuntu 14.04 stuck on boot screen

Today I tried to install Ubuntu on my Dell xps 8700 with windows 8 pre-installed so I changed my boot order to boot from the cd in the installer I chose to delete all and just have Ubuntu all was ...
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115 views

Full Disk Encryption on Mac PC with EFI dual boot

Recently I installed Ubuntu Server 14.04 LTS on my Mac Mini late 2011 using the instructions in the article "Ubuntu + Mac: Pure EFI Boot". Now, I want to do dual boot in my Macbook Pro where I already ...
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45 views

Ubuntu freezes after “Saned disabled; edit /etc/default/saned” during boot

After I have installed Panteon DE and rebooted, my OS does not continiues the boot process after showing following: Saned disabled; edit /etc/default/saned It just displays bootsplash ad ...
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40 views

Hard disk fails sometimes

I'm using Ubuntu kernel 3.13.0-48. Sometimes the system fails to boot. Sometimes it hangs at the boot process just before the welcome login, and sometime grub fails to load the kernel and show error ...
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27 views

New SSD in optical Bay, Cant get boot order to select it first

(fairly new to Ubuntu) Running 14.04 on a Mac (a1278 Mac 5.1), no dual boot just Ubuntu. Just installed a new SSD in place of my optical drive. It was recognized, and I used "dd" to copy my ...
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67 views

Can't generate grub.cfg

Software Up To Date installed a new kernel for me yesterday ( Ubuntu 12.04, kernel 3.13.0-48-generic) After rebooting I ran grub customizer and got an error. Same from update-grub: Generating ...
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110 views

Ubuntu does not boot successfully with btrfs root partition errors

I have a setup on my laptop in which there are three partitions relevant to Ubuntu: a ext4 /boot partition, a btrfs root partition on LUKS and a swap partition on LUKS. Sometimes, after an unclean ...
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37 views

Clean up /boot directory

After an update of my Ubuntu I came to the error, "I cannot update since /boot is full". The thing is, that when I compared the results of the two following commands $dpkg --list 'linux-image*', ...
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23 views

Intel iMac Ubuntu Installation Troubleshooting

I'm having terrible luck trying to install any flavor of Ubuntu on my 2006 5,1 Intel Core 2 Duo iMac. I've downloaded the 32-bit and 64-bit current and past version, as well as tried torrent ...
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43 views

Triple boot problem

I have a Dell Inspiron N5010 laptop. Recently I decided to replace its hard drive with a faster and larger one. On the old drive there were only OEM (1), Recovery (2) and Windows (3) partitions. I ...
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43 views

No bootable device error after resizing filesystem partition

Im quite new to Ubuntu platform. I installed Ubuntu 14.04 recently with 50GB allocated to file system partition. Then i needed to install virtualbox and the size of the file system partition wasn't ...
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39 views

Run a script after every grub-update

I want to run a script automatically after every grub-update. The script itself consists of a single line sed -i 's/[\]"!Windows 2006[\]"/"!Windows 2006"/g' /boot/grub/grub.cfg For this purpose, I ...
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35 views

Ubuntu Virtual Machine cant' mount directories /dev /sys /proc

I am running this Ubuntu Virtual machine on CentOS5- Virtual Host Manager. The Virtual machine can't boot because it can't mount /dev,/sys,/proc. Killed: mount: mounting /dev on root/dev failed: no ...
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31 views

Black sreen after switching user

Here is what is happening in details, in my Ubuntu 14.04 : I log in as user "A" Without terminating the session, I switch to user "B" without terminating the session, i switch back to user "A" and ...
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64 views

Trying to Install Ubuntu 14.10 but will not boot from the hard drive

Okay, I've been at this for 3 days now. I am installing Ubuntu Via USB and I'm using the Universal USB installer and downloaded the Ubuntu 14.10 version. I tried two ways to install it to the hard ...
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62 views

Strange boot issue (purple screen)

I'm somewhat of a noob when it comes to this kind of stuff, but I am a computer science student so I am familiar with operating systems. Anyway, I'll try to be as detailed as possible in describing ...
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63 views

the disk drive for /dev/mapper/cryptswap1 is not ready yet or not present is showing

On a new elementary os installation the swap is not available. I tried all the remedies offered here: What to do about "the disk drive for /dev/mapper/cryptswap1 is not ready yet or not ...
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41 views

Access GPIO pins on pandaboard running ubuntu 12.04

The trouble I'm having is that the error message shows that the kernel does not support gpio. So, what should I do to make the kernel support gpio?
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181 views

How to disable Secure Boot in Asus Z97i Plus to dual boot Ubuntu / Windows 8.1?

In Windows 8.1, I created a bootable USB drive with Ubuntu 14.04 on it. I've installed ubuntu on a partition of the SSD drive. Win 8 is installed on a different partition of that SSD. Problem: the ...
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74 views

Can't install Ubuntu, no suitable graphics mode found

I have downloaded Ubuntu 14.04.2, put it onto a flashdrive, booted from the drive and I am greeted with: No suitable graphics mode found. Booting in blind mode. Needless to say, I can't install. ...
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79 views

Booting Ubuntu from USB

I have tried a persistent installation of Ubuntu 14.10 on my PNY 32GB USB2.0 to use as a portable OS to boot my PCs. Everything is alright. I can boot my two PCs with the flash drive, however, as ...
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117 views

Stuck at splash screen when changing to GDM

After considering it for a while, I finally decided to install GNOME onto my Ubuntu 14.04 system to give it a play and see if I it was worth switching to Ubuntu GNOME. Everything seems to be fine ...
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34 views

Solved - Massive filesystem corruption after latest update on LUKS encrypted drive

I booted my machine this morning and was greeted by a busybox shell. I booted from a live USB, mounted the drive with cryptsetup, but when I try to open it it says my ubunutu--root-vg has an ...
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23 views

Cannot boot into GUI

Cannot boot into GUI at all. Was working for awhile but I think something happened awhile back, when I plugged my TV into the HDMI port on my laptop. After trying a ton of solutions like ...
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98 views

blank screen on boot; can't reach login; 14.04

I've looked through almost all of the suggested questions as well as searched on the error messages in the attached logs and can't find anything applicable - at least as far as I understand things. ...
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242 views

Explanation of entries in dmesg log in Ubuntu Server 14.04

A few days ago I did a clean install of Ubuntu Server 14.04. Everything is working fine, but when my system boots I get these entries in dmesg log: [ 3.106082] EXT4-fs (dm-0): mounted filesystem ...
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Lubuntu 14.04 boot errors

I'm trying to run lubuntu 14.04 (i386) on a old computer. I set up a bootable usb drive. After I choose to run lubuntu "without instalation" I get these errors: 02064241 pci 0000:00:Oa* BAR 4: error ...
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My Sony Vaio VGN-N31M/W will not boot without the power cable plugged in

My Sony Vaio VGN-N31M/W only boots with the power cable plugged in. The screen simply hangs on the Grub screen, it loads when acpi is disabled but the laptop is then very slow and can not recognise ...
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78 views

Ubuntu Server stuck at boot (Starting uuid generator uuid)

When I originally installed a brand new server using netinstall and booted a freshly new installed Ubuntu, it wouldn't boot, but I resolved that with the vga=normal nomodeset kernel parameters. Now ...
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173 views

Ubuntu 14.04 & 12.04 on Asus EeeBox PC EB1037 hangs at boot, EB1033 works fine

We're having issues with Asus EeeBox PCs, specifically the EB1037. We also have the EB1033, but those seem to work without issue. I believe the main difference is BIOS vs UEFI and better GPU on the ...
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152 views

“PXE-E61: Media test failure, check cable” Unable to boot

After trying to update Ubuntu 14.04 I started having this issue. I have since uninstalled 14.04 and tried to go back to 12.04. When I boot the computer I get the error message: PXE-E61: Media test ...
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87 views

14.10/14.04LTS New installation won't boot?

I have a Lenovo Thinkpad Yoga (S1), and I install through a flash drive. After the notice pop up and say installed successfully and restart. The laptop will boot up and stop at boot device choice ...
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116 views

Ubuntu Boot error: NMI watchdog: enabled on all CPus

So, I cannot get Ubuntu to boot on my laptop: I insert my flash drive and change the boot priority and the normal screen of "try Ubuntu before installing" appears. That is what I select. 95% of the ...
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Unable to install Ubuntu or any other distro Alongside Windows

How do I proceeded with Ubuntu installation? Made my USB drive bootable with Rufus. Restart and booted from USB. I see the Ubuntu installation window, clicked next, selected both options Download ...
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110 views

Has the bootoption “acpi=noirq” any disadvantages in permanent use? Help me with debugging acpi pls

I am using Ubuntu for a while now and I have an average knowledge of it, I thought so ;), but have a problem I cant solve alone. I did a lot of research, but now I cant find an other solution and I ...
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918 views

/dev/disk/by-uuid/XXXXX does not exist dropping to a shell

I have just installed ubuntu 14.04 and when I reboot and remove the media I get the Gave up waiting for root device. Common problems: -Boot args (cat /proc/cmdline) -check rootdelay= (did the ...
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20 views

Problems Dual-booting Ubuntu OS on Mac

How are you supposed to partition the drive on ubuntu so it runs along side the mac os.
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57 views

Trouble installing ubuntu from live usb on a windows 8 laptop

I have an asus laptop with windows 8 preinstalled on it. I dual booted it last year and everything worked. then the windows 8 side totally crashed. if it lets me in at all, all I see is the home ...
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149 views

UNetbootin on 32GB USB 3 Stick

I run a windows 7 machine, and use UNetbootin to create Ubuntu bootable live USB keys. I have 1 key in particular that I would like to use entirely as a live Ubuntu key, so I can install some apps, ...
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151 views

Extended Partition (Partition 4) does not start on physical sector boundary for a dual boot system

I have recently installed both windows and linux (64 bits). Upon typing sudo fdisk -l I get the out put below. Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 ...
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177 views

Unpack ISO image, edit some files, repack an ISO so that it still boots

So I've used the live-build tools with some success. An ISO is generated, it loads in Virtualbox but fails to boot because the config file is looking for vmlinuz.lz but binary/casper contains: ...
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Installed Lubuntu alogside with Windows XP but unable to boot

I have installed Lubuntu on IBM Thinkpad T40 alongside with Windows XP . The boot menu appears but my Lubuntu unable to boot.
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Kubuntu cannot start, I'm thrown into busybox

What I did Changed the HD from my previous sony lap to a Lenovo P580, added the Windows drivers required and that worked, I did not check Kubuntu at this time but Grub2 was working. Several months ...
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Fresh install. POST is fine, then freezes saying GRUB

To elaborate, trying to boot into Ubuntu for a fresh install. Never get to the install screen. It passes bios POST, then says GRUB, and freezes. Left it sitting for about 10 minutes, no dice. ...