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

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No modules in /lib/modules Linaro Deskotp

I am trying to run Linaro Ubuntu Desktop on an ARM embedded device - mainly for use of the Unity GUI. When I boot my device I get output to the screen and just before the boot process completes I ...
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28 views

Black Screen after install kernel 4.2-rc3 on Ubuntu 14.04.02 LTS

I hope you can help me, ever after compile and install the Kernel 4.2-rc3 or even the kernel 4.2-rc4 i get black screen on the primary display always, with the next steps you can reproduce this issue ...
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9 views

Computer does not start correctly

I'm running Ubuntu 15.04 on a Dell Inspiron. When the computer first starts, most of the time it just hangs on a purple screen. I have to hold the power button to get it to turn off. When it starts ...
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38 views

Ubuntu freezes, CPU soft lockup, intermittent screen artifacting

I am relatively new to Ubuntu and I am having a few issues, regarding the software or my computer I don't know. A little bit of background - I am dual booting windows 8.1 and Ubuntu 14.04.2 and I ...
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16 views

Wifi drops on apt-get update ubuntu 15.04

need help with Ubuntu 15.04, i updated the kernel to 4.0 and i don't know if that's the reason but the wifi broke on trying on update, be it with the software updater or apt-get update && ...
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7 views

Ubuntu 14.04 Server Keeps hanging, please help!

Have several servers all identical running compute services for openstack. All except one work fine. The one and only server randomly freezes and I can only do a hard reboot to restore it. When ...
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25 views

Ubuntu 14.04 = fn+f2/f3 (backlight) keys not working

With 14.04 LTS Ubuntu (64-bit), using any of the offered kernel solutions (including ones from the newer releases up to 3.19), f2/f3 brightness controls fail to register. As a matter of fact key ...
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10 views

Cpyrit Installation help

I keep having trouble installing cpyrit error is as follows Precision-M4600:~/Downloads/cpyrit-cuda-0.4.0$ python setup.py build The CUDA compiler and headers required to build kernel were not found. ...
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14 views

14.04 Booting Issues

after almost 1 year of use, right after the last update i've started having issues in booting. If i try, that's what i got: [ 0.747081] CPU: 1 PID: 1 Comm: swapper/0 Not Tainted 3.13.0-33-generic ...
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34 views

Virtual box says kernel driver not found

Every time I click on my virtual OS it says Kernel driver not found. I have tried sudo /etc/init.d/vboxdrv setup but it didn't work.
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21 views

Why are the official/stable 4.* kernels marked unstable?

Kernel.org shows 4.1.1 and 4.1.2 as stable. Why then, are they named *-unstable/* here: http://kernel.ubuntu.com/~kernel-ppa/mainline/
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63 views

Cannot upgrade Ubuntu 14.04.02 due to kernel package problem

I am experiencing a problem with 3.13.0.57 kernel. After the upgrade the system was not able to boot anymore. I booted it with the previous kernel image and tried to remove the broken kernel packages, ...
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13 views

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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17 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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21 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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43 views

Ubuntu 15.04/kernel 4.0.1, tpm error (7) occured

I have installed Ubuntu 15.04. Once I had installed all updates, I ran into this error: [ 4.124110] tpm_tis 00:00: A TPM error (7) occurred attempting to read a pcr (I took a picture but it blurs the ...
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16 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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33 views

Ubuntu 14.10 - cannot install updates cos boot is too small

I've just about searched and tried everything now: Ubuntu tweak, sudo apt-get purge linux-image-x.xx.0.xx after checking my current version using uname -r (linux-image-3.13.0.55). I don't want to ...
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14 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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48 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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12 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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26 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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36 views

/casper/vmlinuz.efi: not found for ubuntu 14.04.2 LTS

/casper/vmlinuz.efi: not found is the error that is shown when i tried to start ubuntu for using vmware by downloading an .iso file for Ubuntu 14.04.2 LTS. What should I do now ? Also , when I ...
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35 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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50 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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24 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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13 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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16 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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38 views

Kernel Panic after trying to upgrade from 14.04 to 14.10

I have a Dell XPS 13 9343 which came with ubuntu 14.04. I got a notification of an update to .10 and went for it. Once it finished it said it completed with errors. I sudo rebooted and now the OS ...
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21 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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23 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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20 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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26 views

Update to 13.10 on USB drive causes kernel panic

Apologies if this has been answered already, but I couldn't find anything relevant. I run Ubuntu 13.10 on an external USB drive and it has been running happily (with several updates) for some time. ...
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28 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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9 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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81 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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16 views

Rebuild only kernel image without modules

i want to rebuild the running kernel with a very simple change (suppose only a printk). I would avoid to rebuild all modules, and simply update kernel image in /boot. Here my steps: $ sudo apt-get ...
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29 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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29 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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90 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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89 views

14.04 64x “Kernel panic - not syncing: Attempted to kill init! exitcode 0x000000100”

After a power outage (unplanned shutdown), attempts to reboot Ubuntu Studio 14.04 are greeted with the subject line. Additional lines include; CPU: 7 PID 1 Comm: run-init Not tainted ...
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30 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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12 views

Debugging 14.04 freeze with syslog

Since upgrading to 14.04 a few weeks back, I have been experiencing a problem wherein Ubuntu will freeze (i.e. the entire UI stops working, can't drop down runlevels, etc.), and the only solution is ...
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87 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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13 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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53 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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35 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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29 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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299 views

Failed to start Load Kernel Modules after Nvidia 352.21 installation failure

After booting up Ubuntu 15.04 I get the following message: [FAILED] Failed to start Load Kernel Modules. See "systemctl status systemd-modules-load.service" for details. At terminal I get the ...
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13 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 ...