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

learn more… | top users | synonyms (2)

22
votes
3answers
52k views

Lightdm not starting on boot

I installed gdm for a while as my display manager, and after removing it, lightdm does not start by itself. I instead have to login to a tty, and run sudo start lightdm. Running dpkg-reconfigure ...
22
votes
5answers
6k views

How do I investigate boot and partition issues?

My machine won't boot, or won't choose the right operating system when I choose it in the grub menu, what information do I need to provide in my questions so people can help me?
22
votes
3answers
12k views

Where is log file from rc.local?

I have some commands to in my rc.local. I know that they are failing. How can I get log file with messages produced by executing rc.local? Where is it located? I have checked the /var/log/boot.log. I ...
22
votes
1answer
33k views

What is vt.handoff=7 parameter in grub.cfg?

I wonder what vt.handoff=7 parameter does. I can not find any good man entries for that... BTW, if you have a nice description about: search --no-floppy --fs-uuid --set=root I would be very happy ...
22
votes
2answers
11k views

How can I disable the purple splash screen at boot?

How can I disable the purple "Ubuntu" splash screen that displays at boot before the login screen has loaded? I'd prefer to just see plain text scroll by.
21
votes
5answers
63k views

How to run a script during boot as root

I had a script that automatically enables my wifi without using networkmanager, but I don't know how to run the script as root while the system is booting. How do I make the script run automatically ...
21
votes
6answers
22k views

How folders created in /var/run on each reboot

In recent ubuntus (specifically, what interests me the most is 12.04) /var/run is tmpfs, and thus I assume it starts empty with each reboot. Yet, I see there some folders, like /var/run/mysqld and ...
21
votes
3answers
15k views

How do I find the boot parameters used by the running kernel?

Is there a way to find out with what parameters did the kernel boot? For example if I specify noexec=off at the grub command line? Can I see this sort of info after the system has finished booting?
20
votes
2answers
37k views

GRUB2: Use maximum detected resolution?

How do I tell GRUB2 to set its resolution (and also the one passed to the kernel) to the maximum one it can detect at time of boot?
20
votes
4answers
40k views

“Not a COM32R image” error when trying to install from a USB key

Not a COM32R image boot is a message that the console infinitely keeps spitting out when I try to install Ubuntu 10.04 from a USB. I created the USB using the StartupDiskCreator in 11.04. What is ...
20
votes
12answers
79k views

How do I hide the GRUB menu showing up in the beginning of boot?

I stopped Dualbooting and I dont want to have to choose the OS anymore and just have it load Ubuntu like normal like before? Any help is appreciated.
20
votes
4answers
13k views

Boot time is super fast, how come?

The boot time in Ubuntu is really fast. 7-10 seconds. Comparing it to my mac (which is about 30-40 seconds). How come Ubuntu is so much faster? I'm thinking that it uses a different kernel ...
20
votes
6answers
24k views

Mount an external drive at boot time only if it is plugged in

I've got an entry for an external harddrive in my fstab: UUID="680C0FE30C0FAAE0" /jgdata ntfs noatime,rw But sometimes this drive isn't plugged in at boot time. This leaves me half way ...
20
votes
9answers
50k views

Hide GRUB2 menu UNLESS you hold down Shift key: how to make this happen?

I have a Ubuntu - Windows 7 dual-boot set-up, and I would like to have it that my laptop would boot up Windows 7 unless I press down the Shift key right after boot and bring up the Grub2 menu from ...
20
votes
6answers
53k views

How to boot from non-Ubuntu live ISO images like Fedora or CentOS?

I found that it can be done with loopback as follows menuentry "Lucid ISO" { loopback loop (hd0,1)/boot/iso/ubuntu-10.04-desktop-i386.iso linux (loop)/casper/vmlinuz boot=casper ...
20
votes
2answers
16k views

Where are fsck results logged at boot time, after /forcefsck?

When working remotely I set a server to force an fsck at boot time with the sudo touch /forcefsck command and rebooted. After it restarted I checked in /var/log/fsck for the results of the disk ...
19
votes
2answers
6k views

How can I see what happens during the boot process?

On my machine booting takes more than a minute which is annoying when I see that Windows 7 boots in 20 seconds. Here is what I get when the machine is booting. How can I see what happens when ...
19
votes
7answers
75k views

How to start Virtual box machines automatically when booting?

I have many Virtual box machines in my Ubuntu12.04, each time i shutdown or reboot i have to start them one by one. I wanna a help in writing script for automatically autostart the VBox machines ...
19
votes
1answer
34k views

How to edit ISO Images (Including Bootable ISOs)

I am looking for tools for Ubuntu that can be used to EDIT ISO Images. Including ISO images that are bootable like Ubuntu and Windows ISOs. Not only edit but save the edited ISO and can still boot ...
19
votes
7answers
59k views

Create USB installer to install Ubuntu from the command line?

I'm trying to create a bootable USB image to install Ubuntu on a new computer. I have done this before following the "create USB drive" instructions for Ubuntu desktop, but I don't have an Ubuntu ...
19
votes
5answers
4k views

Is Seagate's new “FAST Factor Boot” technology compatible with Ubuntu?

I'm looking at buying a new laptop and considering buying one with a hybrid HDD/SSD drive. Specifically I am looking at the new second generation Seagate Momentus XT. For some reviews look here and ...
18
votes
4answers
1k views

What do the nomodeset, quiet and splash kernel parameters mean?

What do Kernel command line parameters (also also known as boot options) mean? When you go to Ubuntu (or better, GRUB) options, you have things like nomodeset, quiet and splash. What do these options ...
18
votes
3answers
16k views

How to boot from ubuntu live usb with 'try ubuntu' directly?

I created an Ubuntu 10.10 live usb with persistence feature. And it works well on my PCs. But one thing annoys me is that each time I boot from live usb, I have to choose between "Try Ubuntu" and ...
18
votes
8answers
44k views

How to fix very slow Ubuntu booting?

When I boot up my my newly installed copy of Ubuntu on my custom rig w/4GB DDR3 RAM and a 3 Ghz Intel Core i7, it takes about a minute and a half at the purple loading screen, and then after logging ...
18
votes
3answers
110k views

How can I start in safe mode?

I did a clean install of Ubuntu 12.04 on an Acer AX1430G desktop. Everything went fine until I installed the additional ATI driver. When I reboot the computer, my monitor gives a "signal out of range" ...
18
votes
4answers
41k views

How to understand Ubuntu UEFI Secure Boot install?

Now that Secure Boot is supported, what special instructions does one have to follow to install Ubuntu on a UEFI Secure Boot enabled PC shipped with Windows 8? As I understand, Ubuntu >= 12.04.2 ...
18
votes
2answers
7k views

Boot screen in low graphics/text mode

My ubuntu boot screen shows up in a strange low resolution, almost text mode, instead the usual and sleek white "ubuntu" over dark background. It's not a big issue because when GDM loads everything ...
18
votes
5answers
249k views

Grub rescue prompt, repair grub [duplicate]

I recently repartitioned my hdd and I have damaged grub on my system. On boot I get the grub rescue prompt and I have to go through the following steps in order to boot normally: set ...
18
votes
1answer
2k views

How To Get Plymouth To Display Boot Messages When Booting?

I would like to know how to create a splash for Ubuntu Maverick with boot messages being displayed when I boot as well as a progress bar and a spinning logo. Or, if possible, how to edit a splash ...
17
votes
3answers
96k views

error: file '/grub/i386-pc/normal.mod' not found

error: file '/grub/i386-pc/normal.mod' not found. grub rescue> What can I do? I just sit and stare at it. I found my old netbook (Dell Inspiron 1010) which I have not used for about four years. ...
17
votes
3answers
79k views

How do I boot into the console and then launch the Ubuntu desktop from it?

At the Ubuntu login page I have to hit Ctrl+Alt+F1 to be able to login as an user using the command line. But how do I get to the command line first and then start the Ubuntu desktop from it?
17
votes
2answers
31k views

/casper/vmlinuz: not found

When I start Ubuntu and chose one of the settings it says: /casper/vmlinuz: not found I have Ubuntu on a USB drive. I used this USB creator: http://www.linuxliveusb.com/ I have done this 2 times ...
17
votes
4answers
116k views

Any way to manually make a bootable USB from ISO?

I've been using Unetbootin but it occasionally fails to create a bootable usb the way I need it to, especially with the newer versions. Is there a way I could extract the iso myself?
16
votes
1answer
55k views

How do I remove “Ubuntu” in the bios boot menu? (UEFI)

See this ubuntu appears in BIOS menu I have this on my Lenovo s205 too. Is there some way to remove "ubuntu" from the menu? I don't even have it installed anymore.
16
votes
3answers
17k views

How can I reduce the number of TTYs?

I don't need 7 TTYs (or do I?). So how do I reduce this number to 3?
16
votes
3answers
38k views

Why is the command in /etc/rc.local not executed during startup?

I have a single command in my /etc/rc.local script that is supposed to start the update daemon for Tiny Tiny RSS during startup, but the script is not executed during startup. Why? The entire ...
16
votes
1answer
3k views

boot up problem (14.04 + GRUB + Swap + Nvidia) - with pictures

When I start my laptop, it takes as much as 7 tries to get past the place where the swap gets mounted; if anyone is looking over my shoulder then it becomes 15 tries! My laptop is a lenovo W520 with ...
16
votes
7answers
5k views

Ubuntu 15.04 flashes log-in screen then black

A few weeks ago, I built a desktop and installed Ubuntu 15.04 and have been battling with it ever since. There seems to be an issue with the compatibility of the NVIDIA drivers and Ubuntu. (After ...
15
votes
3answers
30k views

How to enable boot messages to be printed on screen during boot up? [duplicate]

How to enable boot messages, kernel messages and other logs of various services to be printed on screen during boot up?
15
votes
6answers
28k views

Start synergy on boot?

I use synergy. I would like to synergy to start as soon as I turn on my computer. How do I do that? To start synergy, the command is: synergys --config ~/.synergy.conf
15
votes
1answer
16k views

How do I find the last logged system boot and shutdown times?

I'm a Rails developer working on a web application on Ubuntu Server 10.04. Due to internal requirements, I was asked to find the last 10 system boot and shutdown times... I have no clue where to find ...
15
votes
5answers
9k views

Getting back Ubuntu's default boot splash

I am a Gnome user. Just out of curiosity, I installed the package kubuntu-desktop to check out the latest KDE. The package has hijacked and replaced the nice ubuntu boot splash with the blue KDE one. ...
15
votes
12answers
54k views

Blank screen, blinking cursor on boot

Occasionally my Ubuntu 10.04 PC won't boot properly. It gets past Grub and then stops at a blank screen and blinking cursor. From what I've read, this blinking cursor screen is presented by Ubuntu ...
15
votes
2answers
62k views

32-Bit UEFI Boot Support

I recently purchased a Dell Venue 8 Pro. I have read online about what it needs in order to boot into Ubuntu or any other Linux distro. From what I have gathered, what really needs to happen is ...
14
votes
1answer
15k views

Why dd is not a reliable command to write bootable .iso files to USB thumb drive?

As the answers here indicate Ubuntu .iso s are not expected to boot if copied with dd to a USB thumb drive. Now my question is why is so that some Linux distributions have the option to directly write ...
14
votes
3answers
8k views

How do I make Ubuntu “power loss proof”?

I like to run a system unattended for every day 'kiosk' use. However, the system may be powered off anytime without someone doing a proper shutdown before. By default, Ubuntu is not expected to be ...
14
votes
1answer
12k views

How can I ensure a service is disabled on boot? [duplicate]

For some reason I need to disable a system service on boot. In my case this is the Avahi Daemon. I just don't want it to start on boot. In previous Ubuntu releases (e.g. 12.04) I could do sudo ...
14
votes
2answers
110k views

How to install the Boot-Repair tool in an Ubuntu live disc?

When the bootloader (GRUB) is broken, I cannot access neither Ubuntu nor Windows. I heard that an easy solution to fix this is to use the Boot-Repair tool from an Ubuntu liveCD (or liveUSB). What ...
14
votes
3answers
36k views

What do the different Boot Options mean? (i.e. acpi=off, noapic, nolapic, etc)

I've been having issues installing 11.04 on my new laptop, the solution was to enable any of these boot options: acpi=off noapic nolapic But, what do these options actually do? What sort of ...
14
votes
2answers
5k views

Customizing Ubuntu to run from RAM only, within GRUB options

I'm interested in exactly this up, now let me explain what would like to do with this. I'm preparing to buy 32GB of RAM and already have Quad Core. My idea is to implement another option in GRUB that ...