for questions concerning Ubuntu's kernel, including compiling and questions relating to modules

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Setup cross-compile env. in eclipse for Kernel API

I'm cross compiling for a beaglebone black (that is running debian) on ubuntu and I want to make Kernel API calls from module.h, kmod.h, or firmware.h and those don't appear to be in the ...
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36 views

ubuntu 12.04 server livecd install with modules that aren't available in the generic header

I'm trying to install ubuntu on a device with SAS drives. For this to work I need the kernel module mpt3sas. I would need this module to be loaded on startup or do it manually(modprobe) However, it ...
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162 views

modprobe mpt3sas not found in ubuntu installation but should be

I'm trying to install ubuntu server 12.04.4 LTS on SAS drives. I'm booting the installation off of a live install usb. The problem is that ubuntu cannot detect any of these SAS drives. The proper ...
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50 views

Is it possible to customize the kernel when customizing a Live CD?

I am customizing Ubuntu Live by following this answer in order to obtain my preferred ISO. This method is fine, and I have made it work with Ubuntu, Xubuntu, v12, v14, and even Kali Linux. But it ...
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22 views

Ubuntu 15,04 installation

I downloaded ubuntu 15.04 desktop for acer emachines e627. Now made a bootable usb drive out of it using Universal USB Installer. Rebooted and selected flash drive as boot priortized option too. I am ...
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62 views

Why does update-grub run so much?

For no good reason I currently have three versions of the kernel being maintained on my computer (3.13, 3.16 and 3.19). This means when a security fix drips back, I end up with three kernels being ...
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64 views

Kernel debug symbols for ARM64 Trusty

I have qemu running ARM64 Trusty image that I obtained from the ubuntu website. The image name is ubuntu-core-14.04.1-core-arm64.img. I'm trying to install kernel debug symbols onto the image. ...
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61 views

Invalid or corrupted kernel image while booting from virtual machine

When I tried to install Ubuntu 14.04.2 LTS on my laptop using vmware , the screen showed "Invalid or corrupted kernel image" at first and later showed "/casper/vmlinuz.efi: not found" .When I searched ...
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127 views

Experiencing kernel panics, freezing and network errors. Please help!

I've had my own home server now for approximately 4,5 years and it's been running fairly smooth except for some disk breakdowns etc. Although, at various times I've been having issues where the server ...
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60 views

Deleted kernel in Ubuntu

So I was cleaning boot partition and apperently deleted the current kernel alongside the old ones, since after this opertaion I wasn't able to boot any longer. I found some answers to this problem ...
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1k views

Upgrading kernel, Warning message

When I upgraded the kernel to the current version 3.19.0-22-generic I got the following message: Jul 7 13:18:49 ubuntu kernel: [ 717.001387] Jul 7 13:18:49 ubuntu kernel: [ 717.001387] ...
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50 views

CPU Governor Not 'Idling' After Kernel Update

Last night, my laptop running Ubuntu 14.04 asked to update the kernel to 3.16.0-43. I noticed this morning that Conky is now reporting that my CPU is running around max all the time now. Before ...
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57 views

ping6 works but telnet does not work on Mobile IPv6

I am using mip6d in ubuntu 15.04. I did all steps as mentioned here with kernel 4.0.5. Everything (Mobile Node, Home Agent, Corresponding Node) works perfectly. When mobile node is in foreign ...
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69 views

Best way to cope with kernel upgrade and vmware-tools recompilation race condition

I am automatically creating vmware images based on Ubuntu 14.04 using packer.io. I would like to run apt-get upgrade each time I create a new vmware base box. Yet, upgrading the kernel frequently ...
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73 views

Problem booting on the latest kernel (3.16.0-34)

I boot on linux kernel 3.16.0-34 atm. The machine just won't boot on later kernel versions. When I do, i get an error message on the desktop. I assume the reason I can't boot on the latest kernel is ...
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141 views

How can I allow *any* user to write files `/sys/kernel/debug/…`?

How can I allow any user to write files /sys/kernel/debug/...? While creating a debugfs file, I realized that only root on my ubuntu machine can access the debugfs files in /sys/kernel/debug/..., even ...
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51 views

Ubuntu Live CD with /dev/nvram available

Is there any way to make /dev/nvram available when running from the Live CD? It says on the manpage for the nvram driver that it has to be compiled into the kernel. Is it possible to do that while ...
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139 views

Can't boot to new kernel, error processing package linux-image-extra-3.13.0-57-generic

Yesterday I installed the updates ubuntu presented me and now I can't boot in to the most recent kernel anymore, linux-image-extra-3.13.0-57-generic. Starting up immediately causes a kernel panic and ...
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73 views

How do I compile and install a change made to a kernel source file?

I was to apply a patch to config.c file in the drivers/usb/core directory. Specifically, I'm trying to fix the issue detailed in this post. I'm running Ubuntu 15.04 with the 3.19 kernel, a stock ...
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12 views

How to get out of grub after failed update, WITHOUT a cd reader

I tried to install the new version of ubuntu. It took a long time and i let it go on while i slept. When i woke up there was a black screen with commands saying something about the battery. I tried ...
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150 views

Ubuntu 14.04 Kernel 4.1.0devel install panic

I am trying to install kernel 4.1.0devel on Ubuntu 14.04. Machine works fine for default kernel 3.16.0-30-generic. I did the following for compiling and installing the kernel: download the source ...
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83 views

Load newer Kernel module over older build in one on start

I am using the Intel 82579LM network card, for which there is a newer driver available on the Intel driver site. Installing the driver is no problem and after manually removing the kernel module from ...
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39 views

Error after installing new kernel

After installing a new kernel virtual box stoped working and all the solutions to try to fix it return the error. Errors were encountered while processing: linux-image-3.13.0-55-generic ...
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192 views

Having an issue removing old Kernels

I've gotten myself into some sort of infinite loop. My boot partition is full and so I'm trying to delete old packages. When I try this is what I get: You might want to run 'apt-get -f install' to ...
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107 views

Will not boot normally or into recovery

Newbie here. Yesterday I put Ubuntu onto my laptop. Most things were working fine, except the shutdown command would not power off the device. Today, it will not boot normally or into recovery. Normal ...
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276 views

Regarding installation difficulties on a new Dell Inspiron 3451

I recently ordered a Dell Inspiron 3451 (see here and here), and after booting it up once with the pre-installed 14.04 I realized that I wanted to replace the Dell-laced version with a clean, vanilla ...
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33 views

During startup, why does my computer reboot before or shortly after the Desktop appears?

I think it may be a virus in the system area because I scanned the 'Home' folder with both ClamTk and Comodo with updated AV databases and found no culprit. But when I choose 'Advanced Options' from ...
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163 views

Error using apt-get

Hi I am getting an error whenever I use using apt-get. For example, when I try sudo apt-get upgrade Reading package lists... Done Building dependency tree Reading state information... Done ...
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167 views

CPU usage becomes extremely high after opening laptop lid after upgrading to kernel 3.19

So I recently upgraded my kernel to 3.19, and now, whenever I close my laptop's lid and re-open it, the CPU usage will spike to ~75% on all four cores of my CPU. However, Activity Monitor doesn't list ...
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72 views

Trouble booting after each kernel update

For some days now I have trouble booting after updating the kernel. I'm using UEFI without secure boot. Until 3.19.0-18 it all worked fine. When upgrading to 3.19.0.20 the system did not boot with ...
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52 views

permanent disabling ip_forward for ubuntu server happens be a problem

I have just installed the latest ubuntu server. This is the state of my server right after booting: root@vzu01-ubuntu:~# uname -a Linux vzu01-ubuntu 3.16.0-30-generic #40~14.04.1-Ubuntu SMP Thu Jan ...
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29 views

VirtualBox hangs machine in vivid

I have a setup with 5-6 virtual machines in vivid. Running the latest version of virtualbox and the kernel (it appears a number of previous version also show the same problem). When I start some ...
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68 views

CPU usage spikes to 75% and stay there after resuming from sleep mode?

So I recently upgraded my kernel to 3.19 (as part of a failed GNOME install that I have since undone), and now, whenever I close my laptop's lid and reopen it, CPU usage will spike after to minute or ...
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157 views

boot repair is unable to reinstall kernel on mapper/…root

Here is the Boot Info of boot repair... http://paste.ubuntu.com/11721228/ Boot repair never ends and remains by step 'purge kernel and reinstall last kernel mapper/ubuntu--vg-root (ins)' What can I ...
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190 views

How do I fix the End kernel panic error?

so yesterday I tried virtual box out for the first time(so I’m new with this subject) and I tried to install Ubuntu on it but every time i try to boot it, I first get a purple screen, then I get a ...
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15 views

Trying to install Unbuntu but I get this error kernel panic : VFS

I'm trying to install Ubuntu for the first time (Any Linux OS to be clear) and I am getting this error: Kernal panic : VFS Unable to mount root fs on unkown-block(2.0)
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47 views

3.16.0-39 and 13.16.0-38 cause my computer to reboot into Asus express gate. Ubuntu 14.04

I recently bought a new hard drive because of corrupted data on my last hard drive related to SATA errors. That is another story (I hope). My new hard drive was working fine running a fresh install ...
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139 views

edid firmware parameters for multiple monitors

I need some help with drm_kms_helper.edid_firmware kernel parameter. I have two edid firmwares, and I'm trying to set them using kernel parameters: ... quiet splash ...
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113 views

regarding installation of installation of linux kernel 4.0.4 in ubuntu 14.04 LTS

I have installed linux kernel 4.0.4 in Ubuntu 14.04. I compiled this kernel done all the steps,but on rebooting it gives the error shown below. Any suggestion to resolve that problem?
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183 views

How do I fix a vboxdrv setup failure in VirtualBox in dell inspiron 1440?

I use dell inspiron 1440.I am trying to install Virtual box but got some errors. To install virtualbox I downloaded one file i.e. "virtualbox-4.3_4.3.28-100309~Ubuntu~raring_amd64.deb" and used below ...
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13 views

Does the Linux Kernel support MobileIPv6 ?

I am working on MobileIPv6 and want to know if the Linux Kernel supports MobileIPv6 protocol? If yes, which version of the kernel? Also I want to know if there is a MobileIPv6 implementation similar ...
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200 views

How to Make Waltop Graphics tablet fully functional in ubuntu using digimend patches

I have Waltop Media Tablet 10.6” (Rebranded as Genius G-Pen M609X). The tablet works out of the box in ubuntu 14.10, but has only basic functionality. All the extra keys and scroll wheels are ...
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70 views

Rebuilt Kernel and now no WiFi listed by rfkill

Aloha, I installed Fedora 21 alongside my Ubuntu Kylin 14.04 and then downloaded the updates for ubuntu. It froze while finishing the update. The grub menu didn't include Fedora. I got a grub gui, ...
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233 views

Is there anything wrong with this netconsole output?

Ubuntu 14.04 is crashing for me. My original question is here: Ubuntu 14.04 becomes unresponsive I ran netconsole to another machine and do not know if anything in the output may be causing the ...
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133 views

Crouton Ubuntu 14.04 LXDE Can't upgrade kernel

I have an Acer C710 Chromebook which I installed Ubuntu 14.04 (with LXDE desktop environment) to via crouton. By default, it comes with kernel version 3.14, and I need to get it to 3.19 for there to ...
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172 views

HP Stream 14 - Touchpad not correctly working

I've just install Ubuntu 15, but unfortunally tha touchpad is not working as normale! It doesn't recognize two fingers! I see that is a driver problem. What can I do? Is there any fix? I have the HP ...
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148 views

I was trying to compile a kernel on Ubuntu and this error popped up?

/bin/sh: 1: arm-linux-gcc: not found make[1]: *** [kernel/bounds.s] Error 127 make: *** [prepare0] Error 2
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943 views

no HDMI audio on Intel NUC (NUC5i5RYH)?

As the subject suggests, I'm having a bit of trouble getting audio over HDMI with an Intel NUC. I'm running 15.04 Vivid. To be honest, I've heard before that the kernel is considered to be monolithic ...
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50 views

No Keyboard, no network after power-out 14.04 LTS Server

After a power-outage, the server rebooted OK, but fails to set up networking and the USB keyboard no longer worked (A bit of a hinderance as I then have no way to access the machine). I tried several ...
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50 views

Get Systemtap to work on 14.04

I'm trying to get systemtap to work on 14.04. So far I've had very little success: I couldn't find debug symbols for the kernel version for trusty. I ended up installing utopic's kernel (*-38), and ...