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

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How can I disable all console display on my Nexus 7?

I am writing some code to address the raw framebuffer and would like to suppress all writing to the display including anything at boot. I have tried to use abootit to set the kernel parameters to ...
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518 views

disable initramfs in order to accelerate boot process

I was wondering if it is possible to disable initramfs on an ext4 partition in order to reduce the time it takes Ubuntu (12.04) to boot. See source here! Instead, setting up the root device directly ...
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Is this considered a minor kernel update from 3.2.0-24.38 to 3.2.0-35.40?

I am thinking of installing Ubuntu 12.04.1 LTS, 64 bit, English. It comes with a kernel version 3.2.0-35.40 One of my programs only support kernel version 3.2.0-24-generic. On ...
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394 views

Convert existing Ubuntu desktop 12.10 installation to have Xen Guest Support

It looks like previous versions of Ubuntu had a package called linux-ec2 that would install a kernel with Xen Guest support. I was unable to find any packages in specifically 12.10 that install a ...
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141 views

How to use dmatest.ko?

I want to initiate a DMA-Transfer for testing. I stumbled accross a dmatest.c in the kernel sources (drivers/dma). I compiled a Kernel with this Module and tried it without any params. sudo modprobe ...
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181 views

Can't Boot Kernel Error -CPU Features

When I try to use Ubuntu on my PC (Windows), I get the following error: This kernel requires the following features not present on the CPU: pae Unable to boot - Please use a kernel appropriate ...
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45 views

Linux kernel: page substitution policy

I am supposed to answer for homework which algorithm is implemented in Linux for the virtual memory page substitution and also give some extracts of the code to prove that. After some research I have ...
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280 views

Problems with booting Linux after updating kernel

After updating linux headers from 3.5.0-19 into 3.5.0-20 i faced booting problem. I don't know reason, sometimes boots normally, but sometimes i need to reboot 3-4 times. I tried to boot with recovery ...
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425 views

Linux Kernel Code Coverage - GCOV

I'm trying to use some test scenarios from Linux test Project and get the Kernel source code coverage. I'm using GCOV/LCOV to do so. here are the things I have so far: GCOV flags in the build ...
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90 views

Clean uninstall of kernel

During installation of ubuntu kernel 3.5.0.20-33 sthg. wrong happened, I guess during initramfs. How can I cleanly uninstall the kernel? apt-get remove --purge linux-image-3.5.0.20 and re-installing ...
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262 views

I/O memory conflicts

I recently bought a Arctic MC101 barebone (http://www.arctic.ac/en/p/living/office-pc/572/mc101-barebone-a10-4600m.html?c=2296) to run XBMC. I've installed Ubuntu 12.04 on this machine and the latest ...
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434 views

No ethernet or wireless interfaces on 10.04

So, I just got a new Lenovo ThinkPad T430s and installed Lucid 10.04 on it. The installation went fine but when I logged in there was no connection to the internet even with a cord plugged in. ...
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353 views

Lubuntu 12.10 wth Kernel 3.6.7 does not have Video on Skype

I have compiled newest stable Kernel for my Lubuntu 12.10 and I am wondering, why I have no video while I am phoning with Skype. In settings of Skype I could setup the microfon of my Microsoft Webcam ...
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643 views

where can i get vmlinux file for running kernel

I'm developing several kernel module. Also i need some profiling to be done. As all my work is kernel modules, rebuilding kernel seems a overkill. I've seen KGDB/KDB and Oprofile is enabled in default ...
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131 views

VMPlayer does not flush all outputs to serial port

I am debugging a Linux kernel in the VMPlayer on Ubuntu 12.04 configured a serial port to a file to see the debug information. However, each time when the kernel panics, only the backtrace stack were ...
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397 views

Kernel panic on reboot after failed logical volume resize

I attempted to do a logical volume resize yesterday using the follwoing commands $sudo pvdisplay "/dev/sda8" is a new physical volume of "113.11 GiB" --- NEW Physical volume --- PV Name ...
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1k views

WiFi can't connect after suspend

I've had this problem since Ubuntu 11.10 (my first install) but I was able to get around this issue with this answer. After I installed Ubuntu 12.04.1 I tried to use the same fix as before but I ...
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6 views

eSATA PCI card Ubuntu 14.04

I want to get an eSata PCI card and i saw there are compatibility issues with linux. I use Ubuntu 14.04 and I want to get this card. I have kernel version: 3.13.0-34-generic. I would like to know if ...
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8 views

how to do a case study of linux kernel?

Where to start learning about kernel code.From the beginning?which version will be easy to understand the basics?
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2 views

.tmp_vmlinux1 error on Ubuntu (Kernel Compilation)?

Im compiling the google play edition stock kernel for the htc one m8 varient. The kernel is 3.4.0-gb1b6fb1 for android 4.4.4. Im using Ubuntu 14.04.1 LTS. I used the following command: make -j2 ...
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16 views

Huawei E3276 LTE uplink slow in the routing Ubuntu, but not with other devices in the LAN

I have a Huawei E3276 LTE dongle (12d1:14fe -> 12d1:1506) and a problem with the upstream speed. The problem is not only present with Ubuntu 14.04 LTS (64 bit workstation, kernel 3.16), but also with ...
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16 views

Blank black screen with kernels newer than 3.8.0-19

I currently get a blank black screen with latest kernels. Even moving to any of the terminals (using Alt+Ctrl+F1) is not possible. I have tried both Ubuntu and Linux Mint, with the same result. I am ...
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16 views

Ubuntu 14.04 has a bunch of old kernel directories

I saw in Disk Usage Analyzer I have 3.13.0-xx for 8 minor versions of the kernel in /lib/modules. Each is around 200MB. I remember having to go through in Synaptic and remove those old Linux versions ...
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10 views

Debugging random reboots

I'm running Ubuntu 14.04 with 3.16.1 kernel compiled from source, and when I leave my PC running for a long time, it always reboots after about 4-8 days. Nothing is displayed on the screen, everything ...
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70 views

Error installing linux generic kernel ovh

I have recently purchased a vps from ovh and I was trying to install the generic kernel apt-get install linux-image-generic but I got an error. Setting up linux-image-3.13.0-34-generic (3.13.0-34.60) ...
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13 views

glibc reinstallation with new kernel

Recently i removed some old kernel with autoremove function. But later found that i am getting error in configuring linux kerel. Also i googled and got that linux-libc-dev depends on old kernel ...
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18 views

wrong kernel running after install

I have installed Ubuntu 14.04 from unetbootin. When it reboots after the install, uname -r says: 3.5.0-17-generic ..this means that no modules have loaded for the kernel that is actually installed ...
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71 views

Ubuntu 14.04 kernel upgrades not changing default

So i have 3.13.0-34 & 3.13.0-33 & 3.13.0-24 all installed but the system constantly sticks with 3.13.0-24. update-grub does not seem to change this. grub configuration says boot entry 0. I'm ...
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28 views

after upgrade to 14.04 kernel remains 3.2.0

I upgraded from 12.04 to 14.04.1 using the update-manager. During the upgrade there was an error about emacsen-common and I do not overwrite the file menu.lst. After the upgrade lsb_release -a gives ...
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60 views

atl1c module uses 100% cpu, kernel 3.13.0-34

I have just upgraded my 3 Mythbuntu systems to 14.04.1. On one of the systems, I have an Atheros AR8131 ethernet controller. On this system, one of the CPU cores is constantly at 100% usage ...
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10 views

How to add the intel_pstate=enable command to the kernel on an EFI-only system?

I've tried editing the refind.conf file and I cannot get that to work. Is there ANY way to edit the entry that refind auto-detects? GRUB is not installed. The host computer is a macbook pro 11,1.
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44 views

Dell Vostro 2520 WiFi not working after Ubuntu 14.04 update

I tried sudo apt-get install --reinstall bcmwl-kernel-source Wireless worked for sometime...but after reboot WiFi stopped again.... Can someone please help... Software center in additional drivers ...
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54 views

iscsitarget suddenly broken after upgrade of the 12.04 Hardware Stack

After an upgrade to the latest Hardware Stack using Ubuntu 12.04, my iscsi service is not longer operational. The error from the service is such: FATAL: Module iscsi_trgt not found. I have learned ...
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33 views

Kernel broken when I was upgrading Ubuntu 12.04 to 14.04

I'm newbie here and in Linux manipulations. So..I was upgrading Ubuntu 12.04 to 14.04 by automatic processes and when was installing stage, there was interruption of power. To power on pc after ...
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8 views

cannot compile character driver

I am using linux-3.10.48 kernel version, I tried a character driver code which would return the major number for the driver and would register the same. But, the main problem is in the cleanup module, ...
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142 views

ubuntu 14.04 upgrade kernel failed

I upgrade to ubuntu 14.04 and encounterd a wird problem. ~$ sudo apt-get dist-upgrade -u Lecture des listes de paquets... Fait Construction de l'arbre des dépendances Lecture des informations ...
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34 views

Mouse is disabling by itself after upgrading kernel to 3.13.0-34-generic

USB Mouse is disabling by itself after working for 5-10 seconds. when i tried to use cursor isn't moving. but after right clicking continuously its re-enabling by itself
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18 views

Building Kernel Modules with LTS 14.04 and Eclipse Luna 4.4. Why are my gcc build tool includes all screwed up?

I'm trying to use Ubuntu LTS 14.04 and the latest available stable version of Eclipse IDE, Luna(4.4) for C/C++ developers. After successfully importing an existing Makefile project as a C project in ...
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23 views

error: file '/vmlinuz-3.13.0-32-generic' not found

i shut my system down yesterday normally and this morning when I boot I get this error "error: file '/vmlinuz-3.13.0-32-generic' not found." I have tried the all the other advanced options and get the ...
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5 views

How do I know what PEBs the master nodes are mapped to on UBIFS?

How can I find what PEBs(Physical Erase Blocks) the 2 master nodes on UBIFS running on my nand flash device are mapped to?
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10 views

How do I recompile a kernel module and insert it into the running kernel?

How do I recompile one specific kernel module (ib_ipoib) and enabling CONFIG_INFINIBAND_IPOIB_DEBUG and then unloading and inserting the debug version into the running kernel? is this possible?
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8 views

Problem after kernel recompilation of version 3.10.48

I'm using ubuntu 14.04 on VMWare. I currently have kernel version 3.13.0-24-generic. For project purpose we are doing kernel recompilation and downgrading my current version to 3.10.48. It ...
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18 views

Error when trying to compile mstSupportKernel

I am trying to follow the solution for the MST issue outlined here: https://01.org/linuxgraphics/node/358 But when I try to compile the following: sudo make-kpkg -j 4 --initrd ...
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51 views

Ubuntu 14.04 freeze - Kernel panic & Fatal Machine Check

I've got HP ProBook 470 G0 and Ubuntu 14.04 64-bit. Originally, it was preinstalled with Linux SUSE Enterprise but I've erased and installed Ubuntu 14.04 (it was Alpha that time). Laptop was randomly ...
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15 views

How to use JSON-XS bug patch

I am installing a software I need for my research (and because of which I am learning Linux). I am doing it with a script done for someone else for RED HAT. Now corrected for Ubuntu, it still fails ...
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43 views

lm-sensors ubuntu 14.04 core voltages

I am trying to measure the core voltages of my cpu. I installed the lm-sensors, I ran the sensors-detect and I reply YES to all of the question. At the end of the sensors-detect I get: To load ...
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19 views

virtual install from ISO not getting virtual kernel

I have a KVM host (12.04.5) that I have been installing guests on in variety of ways. I just noticed recently one of my guests was running a generic kernel when I'm fairly certain I specified minimum ...
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18 views

Need help about Proxmox and GRUB2 on Debian

I am facing with a big problem. I am freshly installed Debian 7 on server4you dedicated server, and according to this tutorial: Link I am added the repo, installed the kernel like the tutorial said ...
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44 views

The newest kernel 3.13.0-32 fails during boot - any solutions?

The newest kernel 3.13.0-32 fails to boot and hangs saying... resume: libgcrypt 1.5.3 (i think). eventually it complains about not being able to mount swap But when I revert to kernel 3.13.0-30 ...
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14 views

will this kernel fork work on 14.04?

will this http://www.webupd8.org/2013/05/get-better-linux-desktop-performance.html work on 14.04 trusty ?