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

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Reboot is not happening automatically

In Ubuntu 12.04, If I provide reboot or init 6 it is going to shutdown state but it is not coming into Active (manually I am starting it). Can anyone please help me in this.
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47 views

Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(98,1) while using NetKit

I know that question was asked many times but I have another problem with Netkit. I'm so new to Linux and I installed Netkit on Ubuntu for studying about computer networks. After setting up Netkit, I ...
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1answer
32 views

Random kernel panics after upgrade to 14.04

I installed a fresh Ubuntu 13.10 on my Samsung series 9 (NP900X3C). It was working great. However after upgrading to Ubuntu 14.04, I'm getting random crashes and kernel panics. The system might run ...
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2answers
30 views

Deleted old linux images now ubuntu will not boot it just hangs

I know how to remove old linux images from Ubuntu but I think I screwed up deleting something I shouldn't have. What I did was: uname -r and got linux-image-3.13.0-35 (I did not remove this one.) ...
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0answers
65 views

USB Bluetooth Adapter Not Working in Ubuntu 14.04

I have a USB Bluetooth adapter (0a12:0001) that has some problems under Trusty. It works about 50% of the time, and if I unplug it and reconnect it, then it works again. I know this is a known issue. ...
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1answer
816 views

Ubuntu 14.04 problems with kernel 3.17

Just upgraded to ubuntu 14.04 from Ubuntu 12.04. After a bunch of problems with my mouse and keyboard not working at the login screen with kernel version 3.15, I went to grub and switched to a lower ...
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1answer
81 views

kernel panic-not syncing: VFS: unable to mount root fs on unknown block(0,2)

I'm so new to Linux and suddenly found the error message appear when i boot after i click install ubuntu Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,2)
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0answers
19 views

Strange system pauses in Ubuntu 14.04

Folks, I have running a minimal Ubuntu 14.04-1 install + openbox on my new HP laptop. I do not have any other software installed on the machine except the standard software development items such as ...
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2answers
26 views

Keep boot tidy - Script to remove kernel +2

Is there a way to setup ubuntu so that when a new kernel update is installed that it will remove the latest kernel +2? That is not my current kernel not the new kernel but the now useless older ...
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1answer
25 views

Kernel Panic - not syncing on Ubuntu 12.04

Yesterday I was updating my ubuntu from 10.04 to 12.04. I have a laptop, a compaq presario v6000, with that system only: One HD for Linux, no virtuabox, and so on. For update my Ubuntu I used the ...
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47 views

14.04 Kernel Panic

on two of my VMs I get every day kernel panics, but I don´t have logfiles for them. So I tried this to reconfigure rsyslog and setup linux-crashdump but: My syslog logfiles has no entries for the ...
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97 views

What has happened with Qualcomm Atheros AR9485 driver Kubuntu 14.04

I've recently installed fresh Kubuntu 14.04. Everythink was working just fine with my Qualcomm Atheros AR9485 wifi card till today. I don't know what happened ? Is this fault of some standard updates ...
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28 views

Which software ppa to use after applying LTS Enablement Stacks

I have applied the LTS Enablement Stacks on Ubuntu 12.04 LTS I am now running 12.04.5 with kernel 3.13.0.36 (so I guess these are the same Kernel than those currently on 14.04 LTS?). In my list of ...
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1answer
97 views

I'm trying to compile the latest kernel from source but I am getting an error

So I am following this guide: http://kernelnewbies.org/OPWfirstpatchSetup I followed the steps and installed the kernel from source. When I boot into the new kernel, Ubuntu loads up but then I only ...
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3answers
106 views

Why Ubuntu 14.04 LTS use linux kernel 3.13?

Ubuntu 14.04 LTS release with linux kernel 3.13 (development version) but not a stable version of linux kernel (3.14 or 3.12). Is thís because of many new features be added in linux kernel 3.13? Can ...
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0answers
70 views

How to debug a kernel panic? Ubuntu 14.04

So, I have been having kernel panics. My computer will suddenly come off and then a dmesg like output shows on the screen. The first two lines read [20352.651631] BUG: Unable to handle kernel NULL ...
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12 views

How to enable AppArmor as kernel LSM? [duplicate]

I have installed AppArmor but when I start it it says * AppArmor not available as kernel LSM. how can I resolve this?
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0answers
15 views

Xenomai: binding failed: Cannot allocate memory

I installed and configurated xenomai using this guide. There are some examples under xenomai2.6/examples/rtdm/driver-api. To add rtdm module to kernel, I added my gid using below command echo "1000" ...
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1answer
19 views

Browse Ubuntu source code directory

I have Installed Ubuntu 12.04 On Virtual Box. How to browse the source code directory? What is the commands on terminal to do this?
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1answer
19 views

Problem loading ubuntu

I bought a used laptop with the hard drive wiped clean. Tried to load 14.04 got a message that kernel has to be loaded first. Reloaded xp and tried again, same thing?
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1answer
25 views

Edubuntu inappropriate Kernel for installation [duplicate]

I faced this error while Runnign Edubuntu from Virtual Box. I used this edubuntu-13.04-dvd-i386.iso file.
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1answer
96 views

How do I remove old kernel files from /boot and fix a potential error listed in <sudo dpkg --list 'linux-image*'>? [duplicate]

Any help with the following would be very much appreciated: A few days ago I installed the latest stable Linux kernel (3.16.3) and then I used the one liner from here to remove my old kernels. The ...
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0answers
17 views

How to convert .iso file to .img file ? [duplicate]

I am making a simple kernel and to try it on bochs emulator , I need to convert the iso of the kernel to img file. I think, it can be done using the dd utility, but I don't know how to do it using the ...
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0answers
23 views

Hang in 14.04 when mounting NTFS Drobo via Firewire

I was trying today to upgrade my file/media server to 14.04, which has a Drobo attached via Firewire (lspci identifies the controller as TI TSB82AA2). The new kernel sees the controller and Drobo ...
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1answer
16 views

Kernel Panic, Can I get specific info from this screenshot I have?

here are the specs for my desktop: Linux Ubuntu 14.04.1 LTS & Windows 7 HP pavilion p6000, AMD64 Here´s the problem details: Kernel panic error (Ubuntu) and Blue Screen of Death (Windows) ...
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42 views

LIS 3.5 under Ubuntu 12.04 LTS

Unfortunately I needed to run an Ubuntu Server 12.04 LTS under a Hyper-V from MS. After install, I pass through big problems with network and i/o performance. The Hyper-V recommend to update the LIS ...
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0answers
190 views

How to install VirtualBox in Ubuntu 12.04 LTS: “No suitable module for running kernel found”

I have a fresh 12.04 LTS installation. I have installed linux-headers-generic as well as build-essential. When I install virtualbox, I get the following error: Building initial module for ...
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0answers
48 views

kernel make zImage error - No rule to make target vmlinux

I've been searching for a couple of days and I can't find anything on google about an interesting error I get when compiling a linux kernel. I initially thought this problem had something to do with ...
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0answers
13 views

creating a copy of a process in linux kernel

I'm trying to create a copy of a task_struct in the same kernel where the copy's original task_struct is. The copy should have a different PID and the state should be same as the original ...
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1answer
95 views

Why do most of my drivers not load after updating kernel to 3.13.0-36?

I recently upgraded my system with a new motherboard, and reinstalled Trusty to have an AMD64 system (old motherboard was 32-bit). Reinstallation (side-by-side), with 14.04.01 LTS went fine and new ...
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0answers
22 views

How to cause a test crash with kdump?

After installing linux-crashdump and kdump-tools according to https://wiki.ubuntu.com/Kernel/CrashdumpRecipe and configuring the latter so that cat /sys/kernel/kexec_crash_loaded prints 1, I'm having ...
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2answers
48 views

Kernel module needs to be reloaded after boot

I just got my ALPS Touchpad on my Lenovo Flex 2 working (xinput returned "PS/2 Generic Mouse", now it returns two devices: "ALPS PS/2 Device" and "ALPS PS/2 Device") But after rebooting my system it ...
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0answers
27 views

Xenomai: /dev/rtheap is missing

I want to use `xenomai . I try to install on my pc. I read this page and did these steps: http://www.stanley.gatech.edu/skelly/uncategorized/installing-xenomai-on-ubuntu-12-04/#comment-3379 But I ...
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1answer
15 views

How to know where in /dev/ is a USB keyboard loaded?

To be precise, when you plug in a USB storage device, it is loaded in sd something, but where is a usb keyboard loaded in /dev/?
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1answer
46 views

newest kernel not loading

I got problem (maybe after automatic update - not sure) with loading ubuntu (14.04 lts) - it is now showing weird graphic during booting - something like this LINK and then black screen insted of ...
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0answers
39 views

Removed the wrong kernel

I was updating my Kernel today (or at least trying to) from (I think) 3.13 to 3.17-rc6 and while I was doing it I installed the low-latency kernels by mistake. I then removed some unwanted kernels (I ...
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1answer
65 views

How to reinstall kernels after accidental deletion with a separate boot partition and an encrypted LVM volume?

My installation is a Ubuntu 12.04 64 bits (Classic "legacy" MBR - No EFI/UEFI here) with two partition : A separate boot partition An encrypted LUKS volume that contains the system Logical Volumes ...
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103 views

DVB adapter under kernel 3.13.0-35 and above

I have a Ubuntu 14.04.1 server with a MythTV backend server and a Digital Devices DVB adapter. The server has been working fine, but if I upgrade the kernel from 3.13.0-34 to 3.13.0-35/3.13.0-36 my ...
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0answers
40 views

VMWare 8 will not work after upgrade to 14.04

When I try to execute VMWare i receive the message: -VMware Kernel Module Updater --Before you can run VMware, several modules must be compuled and loaded into the running kernel. ---Kernel Headers ...
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1answer
61 views

Black screen and call stack trace showing after kernel update

I ran an update today which included kernel updates. I left the screen for a while and when I came back all I see now is a black screen with white text containing call stack trace information ...
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0answers
12 views

Unable to find my desktop after I boot with a lower kernel

Where is my desktop? My os is Ubuntu12.04.3 3.8.0-29-generic. I reboot the kernel with 3.2.0-23-generic.By sudo gedit /etc/default/grub change GRUB_DEFAULT=saved GRUB_TIMEOUT=2 ...
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0answers
45 views

Unable to install GCDemu in Trusty Tahr

After trying to install gcdemu from ppa I always get this error and im unable to install it I get this error (synaptic:6595): GLib-CRITICAL **: g_child_watch_add_full: assertion 'pid > 0' failed ...
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1answer
146 views

ubuntu doesn't boot with initrd.img-3.13.0-35-generic and initrd.img-3.13.0-36-generic

I'm not able to boot with initrd.img-3.13.0-35-generic and initrd.img-3.13.0-35-generic - just drops into a busybox shell with the regular generic message. I though that was something kernel related ...
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0answers
26 views

How to build kernel with different flags?

Following the instructions here (https://wiki.ubuntu.com/KernelTeam/GitKernelBuild) I built a development version of the kernel. I copied the old config, called make oldconfig and then modified ...
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63 views

Gave up waiting for root device-edited grub and even tried reinstall

After I upgraded the Ubuntu kernel from 3.8.0-29 generic to 3.16.2 i tried to reboot and got dropped to the busy box shell with an initramfs prompt exactly like this Gave up waiting for root device. ...
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0answers
36 views

How to recompile kernel in Ubuntu 14.04?

I wanted to recompile the kernel in my present working directory. I used the below command tar xjf /usr/src/linux-source-3.13.0.tar.bz2 as my current version is 3.13.0-32-generic, to unpack and ...
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1answer
96 views

Error while installing kernel from source

I get the following error when I try to compile kernel version 3.17.0-rc5: Error! Bad return status for module build on kernel: 3.17.0-rc5+ (x86_64) Why do I get this error and what does it mean? ...
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0answers
59 views

Ubuntu 14.04 Kernal Panic - kernel bug at /build/buildd/linux-3.13/kernel/timer.c:930!

This seems to happen intermittently, I can't seem to reproduce the it. It happens at least once a day for the last week or so. Quite frustrating! Screenshot I am unable to get a command line to take ...
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0answers
38 views

computer does not start

I'm using ubuntu 14.04.1 LTS and everything works fine from the day I installed it. Now when I am trying to start my computer, the screen is continuously stuck with so many messages like this: ...
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2answers
56 views

“'version' has bad syntax” error when attemping update-initramfs with -k version

I want to run the following command : sudo update-initramfs -u -k version , but i get the following error message update-initramfs: Generating /boot/initrd.img-version dpkg: warning: version ...