1
vote
0answers
13 views

Linux 3.x init ramdisk embedded in bzImage?

Is the initial ramdisk embedded in to the bzImage? How to load an rootfs.cpio as a ramdisk and switch the root?
1
vote
1answer
40 views

Booting into a kernel image

I have a recently-compiled Linux kernel image (vmlinuz file) and I want to boot into it. I am aware that this won't give me a familiar Linux system, but I am hoping to be able to at least run some ...
3
votes
1answer
40 views

eCryptfs key in kernel image or initramfs

I have an embedded Linux system with unencrypted kernel image and initramfs in NAND flash. My RootFS is in SD card. I want to encrypted some files on SD Card as my SD card is easily accessible ...
1
vote
1answer
63 views

Is it possible to use XNU on GNU/Linux?

I was wondering whether it is possible to use the XNU kernel on a GNU/Linux system? But it would be, in effect, GNU/XNU. But is that possible? Does the kernel have sufficient drivers to boot on a ...
2
votes
2answers
726 views

Linux freezing guess: keyboard & mouse (Archlinux and Ubuntu)

Linux on my PC is freezing a few seconds after startup. I am unable to use the mouse / keyboard. Neither Ubuntu nor Arch do anything after a few seconds. Windows has been running fine for years now. ...
3
votes
1answer
1k views

After installing a new Kernel in Ubuntu 14.04, rebooting takes me to busybox initramfs. How do I mount a filesystem after that?

I have a virtual machine with Ubuntu 14.04 in it. I recently built and installed linux-3.14.5 kernel on it, and tried to boot into it, but it drops me to BusyBox v1.21.1 built-in shell. Here's what I ...
1
vote
0answers
35 views

Get log from kernel while loading

There is a arm/omap2-based device without ethernet, UART ports. It has usb connection with host, numeric keyaboard, LCD display. There is working U-Boot and kernel images for this. I'm trying to ...
4
votes
1answer
781 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 ...
2
votes
3answers
191 views

Why is kernel boot starting too late

Log message from ARM Cortex A9 based board. Running linux. [Sat Apr 12 19:33:50.207 2014] [Sat Apr 12 19:33:50.207 2014] [Sat Apr 12 19:33:50.207 2014] U-Boot 2013.07 (Apr 09 2014 - 12:31:52) ...
2
votes
2answers
152 views

Newly compiled kernel not booting up (vanilla kernel 3.12.14)

I downloaded, configured and installed kernel downloaded from kernel.org. While booting up this new kernel for the first time, this error screen shows which is pointing towards a missing or wrongly ...
1
vote
0answers
203 views

How do I fix this boot-up error (attempt to read or write outside of partition)? [closed]

I just installed a version of ubuntu linux that I got from here, http://www.bauer-power.net/2013/06/bauer-puntu-1304-is-alive-download-it.html using vmware workstation. I have installed it before ...
0
votes
1answer
185 views

NFS: failed to create MNT RPC client status = -101

I am trying for network file system (NFS) booting between two systems. I am using dhcp server to assign IP-address for client. And my kernel and root file system are present in server. My client is ...
1
vote
1answer
118 views

Linux Booting with USB File System [closed]

I'm trying to boot a Linux system stored in a USB drive that I got by following the Linux from Scratch manual. I finished all but the booting part, the problem is that when the kernel tries to to ...
3
votes
2answers
1k views

Human readable dmesg time stamps on OpenWRT

The output of dmesg shows the number of second+milliseconds since the system start. [ 10.470000] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 14.610000] device eth0 entered ...
6
votes
2answers
155 views

Location of the kernel binary (when not in /boot)?

I failed to find the kernel binary in the standard location in /boot. I've also searched the whole file system for vmlinux or bzimage find / -iname vmlin* find / -iname bzimage However, this is an ...
2
votes
1answer
383 views

GRUB2 Insert additional kernel modules

GRUB2 doesn't have the menu.lst file. How do I configure a boot script. During boot, I hit E on the kernel image that I want to modify and make my modifications. But I would prefer to make the ...
2
votes
2answers
265 views

Making a bootable pendrive for custom kernel

I read the tutorials to make a mimalistic custom kernel from here and am able to boot it up as explained in the tutorial over a virtual machine using GRUB as the boot loader. I think it would be more ...
5
votes
1answer
301 views

How to specify an ISO as the location of root filesystem for GRUB?

I'm trying to understand the Debian "booting from Hard Disk" installation manual. The process is as follows: I copy a kernel image, a ramdisk initrd and an ISO with installer to the hard drive and ...
3
votes
1answer
423 views

What happened to `vga=ask` in newer kernels?

I used to activate framebuffer mode in the "older" kernels with vga=ask, and later setting it to a value, once I've figured out which one works best for me. Now, this option seems to be gone, the ...
1
vote
2answers
1k views

Linux Mint Debian quits on boot

I just upgraded Linux Mint Debian Edition with the up7 package. The update manager failed initially (can't remember where...) so I ran sudo apt update, sudo apt dist-upgrade, sudo apt upgrade and ...
4
votes
2answers
2k views

How does Linux load the 'initrd' image?

I've been trying to understand the booting process, but there's just one thing that is going over my head.. As soon as the Linux kernel has been booted and the root file system (/) mounted, ...
1
vote
1answer
67 views

Booting failing in different Debian and Debian derivated distros?

I've tried Ubuntu, Linux Mint and Debian, even though all have worked great for me I'm keeping with Ubuntu, I tested 12.04, 12.10 and even 13.04. The 12.04 LTS is the one I work with. There's one ...
5
votes
1answer
243 views

What does the “00:00:00” timestamp mean in kern.log?

I'm looking for causes of a particular problem in kern.log. There are many entries with a 00:00:00 timestamp: Jun 11 00:00:00 mymachine kernel: [ 0.000000] Initializing cgroup subsys cpusetJun 11 ...
2
votes
1answer
4k views

Excluding kernel modules through /etc/modprobe.d/blacklist.conf does not work

I don't want to load the kernel module nouveau on my debian box at startup, so I put the following in /etc/modprobe.d/blacklist.conf: blacklist ttm blacklist drm blacklist nouveau I even did a ...
1
vote
1answer
409 views

Can kexec be built to a standalone binary, to be used where kexec was not built into the kernel?

I have remote embedded Linux devices I am trying to update to a new kernel without having to physically access. However, the command line options they boot with make one of the MTDs read only - I ...
0
votes
0answers
509 views

*ERROR* timed out waiting for panel to power on

I'm using Ubuntu 13.04 on Asus VX6 (1.8GHz Atom - 2 cores, optimus nVidia ION) with Kernel 3.9.0. When I start my system I get this error: [ 15.728106] [drm:intel_enable_lvds] *ERROR* timed out ...
1
vote
1answer
468 views

Booting encrypted root partion fails after system update

I have a problem booting my Debian Linux server. After a system update, GRUB loads the initrd and the system should ask for the password, but it doesn't. Instead, I get dropped to BusyBox. After ...
4
votes
1answer
246 views

Making a recovery partition in embedded Linux

I have an Atmel SAM9X system running Angstrom. I am trying to make a recovery partition so when a user holds a button during boot up the recovery partition boots up. I have modified the bootstrap so ...
2
votes
0answers
645 views

Unable to install the selected kernel

I have problem with my DVD drive. It's corrupted and when I'm trying to install Ubuntu it stucks (even with the miniISO) I was able to successfully start the OS from system rescue CD. I'd like to ...
0
votes
1answer
181 views

How does kernel swapping / INT 13h interrupts work?

I'm looking for a way to learn about and understand this technique. Here's what I'm talking about: Slax boots, {does stuff, like copy itself to RAM}, then transitions control to the kernel/file ...
2
votes
1answer
614 views

How to skip/exclude one SCSI bus from scanning during boot?

A "Linux debian 3.2.0-0.bpo.3-amd64 #1 SMP Thu Aug 23 07:41:30 UTC 2012 x86_64 GNU/Linux" system has at least 5 SCSI hosts: root@debian:~# ls /sys/class/scsi_host host0 host1 host2 host3 host4 ...
2
votes
2answers
275 views

Why does a graphical install show my boot option, but a textual install not?

I have a system to install SLES 11 on, via a serial console. As this procedure is likely to be executed across multiple systems, I want to automate the whole process. As such, I first did a manual ...
3
votes
3answers
2k views

Given vmlinuz and initrd.gz, how do I find out, where the kernel is going to load / (root) file system from?

I'm trying various ways of Linux installation (from iso, flash, iso on flash, kernel on flash, root FS in iso-file on flash...) and want to understand what's going on. My question is: is it possible, ...
0
votes
1answer
3k views

Kernel upgrade 2.6 to 3.5.3 on CentOS 5.8 -> switchroot: mount failed: No such file or directory

I upgraded kernel on my CentOS 5.8 from 2.6.18 to 3.5.3 and now it is unable to mount the root filesystem: I could not find any explanation through Google. Can you point me in the right direction? ...
0
votes
1answer
215 views

Occasionally kernel panics during boot since 3.3.x with Sandy Bridge

Since kernel 3.3.x there are frequent kernel panics during the boot process. It seems to be a kernel problem since I downgraded to 3.0 and the problems are gone. The kernel panics happen almost at ...
3
votes
1answer
288 views

Gentoo Kernel failing to boot

My machine has two hard drives -- /dev/sda and /dev/sdb. The first has Ubuntu installed. On the second, sdb, I want to install Gentoo. I did all the installation steps, chrooted and compiled the ...
5
votes
3answers
1k views

Does /init (or /linuxrc) script creates temporary device nodes in /dev?

Considering that GRUB executes following lines: kernel /vmlinuz root=/dev/sda1 ro initrd /initrd On boot, how does the Linux kernel finds out about /dev/sda1 device node? I know that ...
1
vote
0answers
469 views

Linux thin station

I have this pc that I just installed and set it up as Linux thin station. I did all the formatting procedures and copying of image to the HD. When I boot it up, I get these, which I think are driver ...
5
votes
2answers
1k views

Booting a newly compiled linux kernel

I have started reading the book Essential Linux Device Drivers. I am following the process for compiling and booting into a new kernel. However I am unable to boot into the newly compiled kernel - I ...
1
vote
2answers
2k views

How to add boot parameters in arch linux

I want to add i915.i915_enable_rc6=1 as a kernel line as described here but I'm unsure where/how exactly.
3
votes
2answers
270 views

How does the kernel “give up” control to distribution-specific initialization?

I've always wondered how the kernel passes control to third-party code, or specifically distribution-specific code, during boot. I've dug around in GRUB's configuration files, suspecting a special ...
2
votes
2answers
4k views

Kernel Panic - not syncing: VFS: Unable to mount root fs after new kernel compile

So I've been at this for a while and have been poking around for an answer for a few days, and figure it's about time to ask for help. I am running Ubuntu 10.10 in VMWare Fusion, and have downloaded ...
4
votes
2answers
1k views

Multiple root options in Linux command line

My kernel command line looks like this: root=31:0 ro noinitrd console=ttyS0,115200 root=/dev/mtdblock2 rootfstype=squashfs I think the first root entry identifies a disk by its major and minor ...
3
votes
2answers
443 views

Choosing a device name under /dev from the kernel command line

I am booting CentOS via a USB install. The boot method is simply booting the ISO from GRUB2 installed on the USB Key. The USB key always gets the "name" /dev/sda. Can I change that name from the ...
-1
votes
1answer
378 views

Set Kernel Root to Same Partition as Boot

Running GRUB, I want to set the kernel root parameter to the same partition (or more generically, to a partition on the same device) as the disk with the bootloader. Initially, the install set the ...
2
votes
1answer
584 views

Kernel can not boot after upgrade on Fedora OS 15

I am using Fedora 15, and want to upgrade to version 16. I followed the official link Upgrading Fedora using yum - FedoraProject to upgrade my OS by the following command: yum update kernel* ...
7
votes
3answers
2k views

Why does initramfs mount the root filesystem read-only

What is the reason for the root filesystem being mounted ro in the initramfs (and in initrd). For example the Gentoo initramfs guide mounts the root filesystem with: mount -o ro /dev/sda1 /mnt/root ...
5
votes
1answer
1k views

Silent booting Linux from u-boot

For security reasons I have to boot Linux from u-boot with all output hidden (silently) until a password is entered. I've configured uBoot to do this correctly using the CONFIG_AUTOBOOT_KEYED macro ...
1
vote
1answer
381 views

Coreboot + QEMU Tutorial Request (Google has failed)

Can anyone point me in the direction of an end-to-end idiot-proof coreboot+qemu tutorial? I'm having trouble understanding how qemu is set up to emulate different hardware (also having trouble ...
3
votes
1answer
886 views

description of linux kernel boot parameters 'real_root' and 'cdroot'

I am looking for a formal description of the following boot parameters in the linux kernel: real_root cdroot I have problems tuning them to create my own bootable LiveUSB system. Are they ...