Bootloader issues: what happens before the operating system itself starts.

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11
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0answers
1k views

When do I need to specify add_efi_memmap as kernel argument in UEFI/EFI boot?

I am reading some tutorials how to EFI stub (efistub) load the Linux kernel. These instructions often use kernel boot parameter add_efi_memmap. The intended hardware is Intel x64 having 8GB of RAM. My ...
0
votes
1answer
30 views

Grub reboots PC after showing only “Grub loading.”

I have this old computer I use for the more experimental OSes, and about a month ago I installed Gentoo on it, with GRUB2 as boot loader. Everything worked fine, but every boot it would show an error ...
1
vote
1answer
198 views

Unable to delete boot entries using efibootmgr

This used to work in the past but since recently deleting entries with efibootmgr fails with return value 15. Changing the boot order fails as well. However, creating new entries does succeed, ...
2
votes
2answers
36 views

How to defend against a Live USB computer hack

A Linux installation can be simply hacked by using a live USB/CD, gaining root access on the live distro, chrooting to the target filesystem and running passwd root. One can use grub too. There may be ...
1
vote
1answer
85 views
+100

Boot to different partition after restore of operating system

Let's say I have a server with one RAID with 3 partitions: P1 - 20G OS / programs P2 - 190G Data P3 - 20G unused If I ever need to roll back P1 to a previous state, and I've restored a past ...
2
votes
1answer
111 views

NFS root filesystem doesn't mount at boot

This is an embedded device with a custom kernel (see below for relevant config). It's an x86-32 machine booting like this: coreboot->uboot->linux. I can mount the NFS share in linux if I use ...
1
vote
1answer
1k views

Linux USB Boot results in black screen

I'm trying to install Linux alongside Windows 8 on my new Asus Zenbook UX32VD, which has both an Intel HD 4000 and a NVidia 620M I've been having quite a few problems booting up linux via USB so I ...
0
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0answers
21 views

Arch Linux Boot Halts on “Started Authorization Manager.”

I was using Arch Linux on my laptop, and during the shutdown procedures there was something making it wait and during that time my laptop ran out of batteries. Now when I try to boot it halts. This ...
1
vote
1answer
177 views

Is vmlinuz and bzImage really the same?

I just stumbled upon this page, which says that bzImage and vmlinuz are identical. bzImage is then copied using the cp (i.e., copy) command to the /boot directory and simultaneously renamed ...
0
votes
2answers
23 views

Uboot pass arguments to kernel!

How uboot can pass command line argument to kernel? I did some googling and got to know that it uses bootargs environment variable.There it was mentioned that setenv bootargs key=value.Since I am ...
2
votes
2answers
1k views

Debian won't boot: udevd fails to load device sda and sdb

I can't boot my Debian system, I got this error during boot up: Driver 'pcspkr' is already registered, aborting. I have solved this by adding blacklist snd-pscp to /etc/modprobe.d/blacklist.conf ...
4
votes
1answer
53 views

how to completely blank video output on boot (no kernel logging, grub output, etc.)

So, this is an inversion of the classic question: "Why is my terminal blank on boot?" -- How do I make my terminal blank on boot? I'm creating a Debian Wheezy system with GRUB as the boot loader that ...
1
vote
1answer
33 views

Grub 2 multi image boot disk boots some images but restarts on others

The issue I'm having is that my bootable usb I have only works with certain boot images, to be more specific it will boot Ubuntu desktop iso images but not Ubuntu server. If I try to boot Ubuntu ...
2
votes
1answer
1k views

Can't boot truecrypt's rescue.iso on usb using UNetBootin

I tried Unetbootin to put the truecrypt rescue.iso file on a USB stick, but the USB stick does not boot properly. It gets into an infinite loop with boot default in 10 seconds over and over again. ...
0
votes
0answers
27 views

grub2: error: /vmlinuz-3.16-ucs109-amd64.efi.signed has invalid signature

I am using a derivative of Debian, called Univention Corporate Server. It's a nice appliance that I use for my home server. Yesterday I upgraded to the newest version and since then my server does not ...
1
vote
2answers
125 views

Writing openSUSE image to SD card

I am releatively new to linux and I have assembled a raspberry PI 2 model B and I'm relavively unexperience with linux. I have tinkered in the past with SUSE and want to start doing it again. I have ...
3
votes
1answer
28k views

How can I fix/install/reinstall grub?

So I started out with a 250GB HDD, the stock drive from an EeePC 1015pem that I am trying to turn into a MintBook. The drive is physically operable, but all data has been nuked, including the old OS. ...
-3
votes
0answers
28 views

Kali linux does not boot in gui

I got kali linux installed on my pc for a while but now linux will not boot in gui mode , only in text mode ( terminal ). I get no errors on booting it goes directly to the login screen . Hope you ...
1
vote
0answers
11 views

How to get the values for “set root” in menuentry while setting password for GRUB2 on CentOS 7

I need to disable single user mode on my servers running CentOS 7. I read the RedHat documentation on what goes to /etc/grub.d/40_custom and how to encrypt the password and all but one details makes ...
3
votes
1answer
877 views

How do I resolve an error when booting, “Couldn't find device with UUID…”

I have a RHEL 6 system, running on a VMWare machine. The admin of the VM server added a second RAID volume to the server, which my RHEL system does not use. Now, when I boot the RHEL system, I get a ...
1
vote
1answer
1k views

Gnome doesn't want start

my problem is following: some time I just restarted my computer, after restart the gnome doesn't want to show up, I have only the 6 tyy's terminals ( I can log in and do whatever I want ). I am ...
6
votes
2answers
1k views

How can I boot the PC-BSD live DVD-ISO IMAGE directly via GRUB2?

Via the loopback command, GRUB2 allows to directly boot an ISO file. Now, I've configured the according menuentry to boot the PC-BSD Live DVD ISO, but when I try to boot it, the FreeBSD bootstrap ...
0
votes
0answers
10 views

Failed to start user service: unknown unit: user@0.service after grub launch

First I have to let you know that I got absolutely no knowledge about linux and need help and explaination like Im 3. So, Im on holidays and I have no live cd with me. I tried to install crome and ...
0
votes
0answers
31 views

Why my manufacturer splash screen is not showing?

I recently installed Fedora 22 on a dual-boot with Windows 8 on the other. But, since I installed it, I have had the following problem: When I press my power button to switch it on, the screen just ...
4
votes
1answer
2k views

Setting up HDMI output from Linux console

I am currently running Debian Wheezy on a HP Microserver N54L with an AMD Radeon 5450 video card. I would like to be able to play audio from the console through the HDMI port of my video card and ...
1
vote
0answers
16 views

Live USB - Tails tries to boot but ends up booting into Kali Linux

I have a bootable USB drive with Tails and Kali Linux on it, among others. Kali boots fine. However when I try to load Tails, it manages to get past the Tails loading screen but then the Kali logo ...
30
votes
8answers
20k views

SSH to decrypt encrypted LVM during headless server boot?

When I installed Ubuntu 10.04 and, now, 10.10, I was offered the option of enabling "encrypted LVM" for my hard drive. After choosing that option, I am prompted for my password during boot to decrypt ...
0
votes
1answer
36 views

Boot Debian netinst CD to RAM?

Is it possible to boot an install CD to RAM? I want to boot the CD and eject it before I proceed with the setup. And when not, where do the changes have to be made, to get a "toram" boot option?
0
votes
1answer
3k views

Fedora 20 boots in emergency mode

After reformatting a disk that I think had nothing to do with the Fedora installation, it now boots always in emergency mode, no matter what "Fedora" option I choose in the bootloader My disk ...
0
votes
1answer
659 views

Boot linux on pendrive error: No configuration file found

I created a bootable flash drive using Universal USB Installer. However, the error message appears to start it: No configuration file found How to solve this problem? I've got sometimes with this ...
0
votes
1answer
19 views

how do I make a grub boot disk with multiple boot images

How do I use commands (I'm doing everything on Ubuntu) to create a bootable usb that displays a grub menu automatically when booted from, on that grub menu lists some boot images (downloaded from ...
0
votes
1answer
685 views

ELAN Touchscreen on Ubuntu 14.04 and Debian 7.6

I recently purchased an ASUS Q550LF laptop with Windows 8.1 preinstalled, and subsequently installed Ubuntu 14.04 and Debian 7.6. I use Ubuntu for most tasks, but occasionally have reason to boot ...
0
votes
1answer
24 views

What is the difference between the /boot partition files and the /boot directory in root? [duplicate]

After having trouble with booting Linux after installing Windows 7 on a separate SSD, I am just wondering, what is the benefit of creating a separate /boot partition during installation? I remember ...
2
votes
1answer
275 views

Grub - boot debian iso file from ntfs partition and install it

I have problem installing debian directly from hard drive. Say, i have a logical partition /dev/sda5 and there is debian DVD iso file located in (hd0,5)/iso/debian-8.0.0-amd64-DVD-1.iso with initrd ...
0
votes
1answer
2k views

Debian 6 Gnome black screen after boot

I installed Debian a few weeks ago, and the last time I ran apt-get update, I think it updated something xorg/xserver, not sure. Since then i get a black screen after boot. If I go into recovery mode ...
0
votes
0answers
16 views

An error during boot that I can not see

When I boot fedora, It shows an failure about modules and it disappears and then splash appears. I checked the /var/log/boot.log but there was no errors or failures there. Where can I find it?
0
votes
1answer
2k views

Kali Live USB won't boot. Takes me to blinking cursor

I am trying to install 64 Bit Kali Linux to a laptop. Whenever I boot through a live USB the menu opens, but when an option is selected it takes me to the black screen, with just a blinking cursor ...
1
vote
1answer
1k views

Linux Mint: How to enable cryptswap with custom password?

When you want to use hibernation and you care for security, you'd like to have the swap encrypted. But not with the random password, chosen for you at startup, but with a fixed one, supplied by you at ...
1
vote
1answer
2k views

RHEL Installation issue with UEFI on HP Compaq Desktop

I have bought a new Desktop HP Compaq Elite 8300 SFF. It came with Windows 7 Pro installed. Now I want to install Linux (RHEL) by dual booting it. I have successfully shrinked the partition and ...
1
vote
2answers
44 views

Linux fails with starting on a dualboot system after Windows update

I have Windows 7 and Kali Linux on my computer, normally I don't use windows anymore. But today I started windows and it updated itself. I am writing my thesis and all my stuff is in Linux so I really ...
1
vote
1answer
1k views

How to access u boot environment from linux?

How can I access and change the u-Boot env variables in linux. Using the u-boot/tools/env directory in u boot directory: u-boot$ make env Which created the executable file fw_printenv. I copied ...
5
votes
2answers
2k views

Best way to set serial port speeds on boot?

I've got instruments hooked up to /dev/ttyS1 through ttyS9 on a machine running Debian Wheezy. The various instruments communicate at various speeds. Is there a better way to set the baud rates than ...
3
votes
1answer
1k views

Booting from ISO in Xen Paravirtualized Environment

Specifically, Citrix XenServer 5.6. I can map the an ISO from a Storage Repository with no issues and mount it inside the OS but I can't boot from the DVD drive without converting it to HVM, which ...
0
votes
1answer
44 views

Unable to Boot After removing Old Kernels

I removed old linux-image and linux-header files to free up space in /boot. I did this first by purging them in terminal, and when I noticed some issues with how the the operating system performed, i ...
1
vote
1answer
114 views

Unable to see Fedora 20, when triple booting it with Debian 7, and openSuSe 13.1

I just don't understand why I cannot see my Fedora 20 having it planned to triple boot it with Debian 7 and openSuSe 13.1. Initially I partitioned my system to: /dev/sda1 for openSuSe 13.1 /dev/sda2 ...
2
votes
1answer
409 views

Linux Mint (LMDE) suddenly crashed and won't boot again

I was working on my linux machine earlier today and when I was in the middle of updating my java packages through the package manager and installing coffee script, my windows started not working and ...
4
votes
2answers
2k views

grub error : “File not found” for separate /boot/efi partition

I've installed CentOS 6.4 on UEFI enabled machine, created /boot/efi partitions. But my grub is not automatically starting, if I start the PC, I start in Windows 8. I can only start CentOS by ...
0
votes
0answers
5k views

stuck at grub rescue on boot, no bios, no live cd, ls returns hd0

I have an external hard drive with elementary os on it, and when I took it out my preinstalled windows 8 laptop, it came up with the "error: no such device:'hex number' grub rescue>". I can't boot ...
1
vote
1answer
87 views

Where in the kernel /dev/kmsg gets initialized?

I'm trying to figure out at which point in the boot up process /dev/kmsg gets initialized and can thus be written. On my system the first line that occurs in dmesg is printk(KERN_INFO "Initializing ...
2
votes
1answer
571 views

How to fix boot error UUID disk drive is not ready or not present where micro failed to load microcode_amd.bin and HDIO_GET_IDENTITY failed?

When I updated to the new Kernel 3.7.2, everything goes ok, but when it comes to powering on Linux Mint, it shows me two warnings: What's wrong and what can I do?