Use this tag for questions about loading, configuring, or compiling them. See also /drivers for questions about which modules to use for specific hardware. A kernel module is a bit of code that can be added into the kernel by the administrator while the system is running, typically providing one ...

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drm Kernel v>3.11 Issues

Just a regular Fedora 20 user here (coming from no answers on ask.fedoraproject.org). I'm having some issues with the most recent kernel versions. The last working (no black line) kernel I have ...
4
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2answers
12k views

How to solve “building the main Guest Additions module Failed”

I tried to install the VirtualBox Guest Additions module in a VM guest running CentOS but I get this error message when everything else was okay: building the main Guest Additions module Failed ...
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0answers
24 views

Failure loading kernel module

I've followed the steps at Build Your Own Kernel Modules (CentOS) but when I modprobe it fails: [root@centos7 ~]# modprobe pcnet32 modprobe: ERROR: could not insert 'pcnet32': Exec format error ...
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0answers
22 views

“disagrees about version” message

I get a message "disagrees about version" on boot time, after compiling kernel and modules with KGDB. Why should this happen ? Is there any problem with KGDB ? This is the relevant log at boot: ...
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0answers
52 views

Upon bootup, all iptables are lost because the kernel module ip_set is not loaded

i can get iptables to whitelist / blacklist using ipset members, but after a reboot, the iptables are emptied out because the kernel module is not loaded. Have limped along in the past by customizing ...
2
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1answer
30 views

load module via /etc/modules

I want to load my kernel module hello.ko on boot in Ubuntu 12.04. I placed it in /lib/modules/3.8.0-31-generic/kernel/ubuntu/hello.ko, ran depmod -a, and added "hello" to /etc/modules. However, when ...
4
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2answers
50 views

Trigger an init script when a specific device is up and a kernel module has been loaded

On my ubuntu 12.04 servers, I need to write an init.d script that waits until the infiniband interface (device: mlx4_0, interface: ib0) is completely up, and until the knem kernel module is loaded. ...
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0answers
34 views

What does __ prefix before some kernel api's convey?

Why do some function calls in kernel specially have this prefix __ example: __init initialization(void) is __init a macro? What does this convey? Are these a special class of function calls inside ...
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0answers
9 views

Module load map

How can I obtain a module load map? I've tried with the -m flag in insmod but it seems that since 2.6 there is no support for it. Thanks
5
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1answer
330 views

Loading speedstep_centrino kernel module

Because of a noisy fan in my laptop, I need to change CPU frequency and for this task I need to load the appropriate kernel module. The CPU in my laptop Acer TravelMate 4002WLMi is: $ cat ...
2
votes
2answers
197 views

IPv6 NDP timer problem

Need to change Fedora Linux's IPv6 stack for NDP DAD timer changes. How to locate the Fedora's IPv6 and IPv4 stack in Fedora distribution dvd/site so that, we can recompile and generate new stack ?
2
votes
1answer
882 views

Scaling issues of i7 3520M with intel_pstate module on Kernel 3.10.0

Few days ago I updated my openSUSE 12.3 system from Kernel 3.9.8-1.gf3348a8-desktop to 3.10.0-1.g3dcd746-desktop and since then, turbo mode of my i7 3520M is enabled by default and it does not ...
3
votes
1answer
33 views

How do I find out what filesystem drivers are compiled-in into the linux kernel?

On a running linux system, what is a portable (among linux distributions) way to find out what filesystems the current kernel has compiled-in (not through modules) support for? Consider for example ...
5
votes
2answers
3k views

Find out which modules are associated with a usb device?

Could you recommend a way to figure out which driver is being used for a USB device. Sort of a usb equivalent of lspci -k command.
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0answers
62 views

Is this kernel warning a major problem that needs my attention?

Our Linux based Thecus N12000 NAS recently experienced this message in its dmesg log. [2014-05-21 11:34:56] ------------[ cut here ]------------ [2014-05-21 11:34:56] WARNING: at ...
2
votes
2answers
77 views

How can I install Fedora with a newer kernel?

I want to install Fedora on my computer with a netinstall, but it seems that the kernel doesn’t support my ethernet chip (Intel I218V). I tested Ubuntu 14.04 and Arch Linux and the ethernet chip ...
1
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0answers
25 views

CPUFreq Kernel module

I would like to try the CPUFreq module on my board (Marvell Soc based on ARMv7 running a v3.15 linux kernel). My architecture is obviously not supported by the default source code (located in the ...
1
vote
1answer
74 views

aircrack-ng shows negative channel

On many Linux distributions, be it BackTrack, Kali, BackBox, Ubuntu, Mint, etc., whenever I use anything from the aircrack-ng suite my wireless card is shown as channel -1. This problem has been ...
1
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1answer
18 views

Which kernel module name is currently correct “usb-storage” or “usb_storage”?

I have found a number of examples how to prevent a kernel module from being loaded. One of them is about USB storage module. The next code has been provided: echo "blacklist usb-storage" | sudo tee ...
1
vote
1answer
41 views

unrecognized inateck hdd enclosure with linux Mint

I have put in a Hitachi 2.5 inch hdd inside a Inateck hdd enclosure. I have connected the enclosure to a Toshiba R630-156 using a usb2 cable on a usb3 enclosure port. I can hear and feel the hard ...
0
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0answers
20 views

Calling speaker-test from usermode-helper API

I needed to call come audio-producing applications from kernel in a toy module. In order to test that, I thought of calling speaker-test from a simpler module, but no sound would ever come from it. I ...
0
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0answers
26 views

Virtual serial port problem

Background: I've to test external GSM module, connected to PC with serial port. Since I'll have to either send messages both to do more, I need to create two virtual serial port (script provided by ...
0
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0answers
72 views

How to get an Wacom Intuos CTH-480 to work under Easy Peasy 1.6 (Ubuntu 10.04)?

Is there any way to make a Wacom Intuous CTH-480 work under Easy Peasy 1.6 (Ubuntu 10.04)? I have installed the Wacom Driver files according these instruction, replacing 3.7 with 2.6.30, as Easy ...
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votes
2answers
20 views

Check multiple files with string

i.e. for each .csv file, do the following: Check if the file contains the string “HEADER” in the first line. If its missing, do the following: Display, “ERROR: Missing HEADER record for ” Rename ...
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0answers
28 views

Opensuse remove kernel module

I recently installed OpenSuse. I have a problem with the mouse left click. I had the same problem in Debian but when I removed the psmouse module everything started working perfectly. I tried the same ...
2
votes
0answers
59 views

How can I set up an offbrand display link (Trulink) to work with arch linux?

I recently bought a USB to DVI adapter and it works great in Windows. However, I wanted to use it on Arch since that's where I do most of my work. Unfortunately it doesn't work. I've installed all ...
2
votes
1answer
101 views

kmod-staging-3.14* on Fedora 19?

I use Fedora 19 (Schrödinger’s Cat) on most computers as I prefer it over others (I probably would use Fedora 20 if I could have Gnome 3.8 plus a few other packages). My problem is that I use ...
2
votes
1answer
24 views

200+ instances for fglrx?

I was browsing the basic info about the modules that my kernel is currently using on a machine I have, and this piece of information pops up. $ grep fglrx /proc/modules fglrx 8085343 200 - Live ...
1
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1answer
63 views

From Python script to Kernel Module [closed]

So I have a python script that emulates an ESC_KEY on pin 17 (Raspberry Pi). #!/usr/bin/env python #Imports for Pins,input import RPi.GPIO as GPIO import uinput from time import sleep #Setup ...
3
votes
2answers
5k views

Ubuntu make fails with No such file or directory /lib/modules/3.4.0/build

I am trying to build the CP210x driver for the 3.x.x kernel on ChrUbuntu. Build instructions: Ubuntu: make ( your cp210x driver ) cp cp210x.ko ...
1
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1answer
368 views

Virtualbox kernel modules not loading at boot

I have been running virtualbox on an Ubuntu 12.04 laptop for a while and it has all worked smooth, but suddenly, probably after a kernel upgrade, the vbox* modules are not loading at boot, if I ...
2
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0answers
56 views

kernel build: why does 'make install' complain about missing modules?

I'm building a 3.2.x kernel on a RedHat Enterpise system. During 'make install' it takes a very long time and is complaining : ERROR: modinfo: could not find module xxx I assume its probing ...
1
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1answer
20 views

How to preserve .d files after kernel compilation?

I'm compiling third-party kernel modules. Their build system goes to /usr/src/linux-headers-[version] (of a custom kernel chroot) and runs make from there. I want to find out, which files - sources ...
3
votes
0answers
335 views

How to compile AMD Legacy driver on 64-bit kernel, Linux Mint 17 [on hold]

I'm trying to get the legacy driver for my HD 2400 GPU but I had an error while it was building. I looked at this answer, and have the same result, in the driver manager is empty: ...
8
votes
5answers
3k views

Benefit of kernel module compiled inside kernel?

What's the benefit of compiling kernel modules into the kernel (instead of as loadable modules)?
1
vote
1answer
27 views

Compress memory on low Ram VM

Is there a way to get out more out of your limited Ram on a VM? I have a VM running on a cloud hoster and try to optimize a quite low on RAM mashine. I heard, there is a way to compress parts in the ...
0
votes
0answers
96 views

Virtualbox installation

I'm trying to install virtualbox. But when I run dpkg -i {dpkg package} I get following error: sudo dpkg -i virtualbox-4.1_4.1.18-78361~Ubuntu~precise_amd64.deb Selecting previously unselected ...
1
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0answers
50 views

EDAC (Error Detection And Correction) infrastructure in linux kernel

I am wondering how I can make use of the EDAC infrastructure in linux kernel. I have a i7-4600M CPU and I have compiled EDAC as a module in my kernel: --- EDAC (Error Detection And Correction) ...
1
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0answers
59 views

CPU usage by kernel modules, routing and forwarding rules

I have a system with a loopback kernel module installed. Through a bunch of routing and iptable rules, packets coming out of the loopback interface are sent over an ipsec tunnel. I am seeing that ...
1
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0answers
31 views

Adding IPVS to the kernel

I am trying to setup keepalived on a pair of VPS load balancer servers. I have hit the road block of IPVS not being included with the kernal. IPVS: Can't initialize ipvs: Protocol not available I ...
3
votes
1answer
144 views

Library routines in linux kernel

In the linux kernel, there is a section "Library routines" with a snippet shown below: Library routines ---> <M> CRC-CCITT functions <M> CRC ITU-T V.41 functions <M> CRC7 ...
2
votes
2answers
937 views

VirtualBox: modprobe can't find vboxguest, vboxsf, vboxvideo

I've been following these instrctions to install the guest packages for arch linux. Unfortunatelly modprobe returns: [snooc@archfire ~]$ modprobe -a vboxguest vboxsf vboxvideo modprobe: WARNING: ...
1
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0answers
90 views

Kconfig - compiling kernel module

I stumbled over this site about USB video grabber under Linux, I'm trying to compile the code found here. I have read about makefiles but this one confuses me, cause it's so short: usbtv-y := ...
1
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1answer
97 views

custom kernel and firmware loading

After I have compiled my kernel, and when I type make modules_install, not only are the modules copied into /lib/modules/ but also firmware is copied into /lib/firmware/. The following is the end of ...
0
votes
1answer
56 views

Why does kernel-devel contain so many “empty” directories?

I have been a Windows kernel developer for many years. Now I start to develop Linux kernel modules. To begin with, I installed kernel-devel under /usr/src/kernels/$(uname -r). However, after checking ...
3
votes
1answer
973 views

usb kernel module does not load on demand but works fine with insmod and modprobe from the shell

I have a USB Linux Kernel module that compiles and builds. Running insmod loads my module and dmseg and tail -f /var/log/debug shows me it works as expected. Running depmod -a then modprobe from the ...
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votes
0answers
20 views

information about txop in ath9k wlan driver

I'm trying to implement the rate control algorithm into ath9k wireless LAN driver. I need to find if the transmission of first packet in the TXOP has failed or succeeded (ack received or not). I ...
1
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0answers
105 views

Can only initialize Ad-hoc mode after restarting iwlwifi mod and network manager

I am running Ubuntu 12.04.4 with network interface: *-network description: Wireless interface product: Centrino Advanced-N 6235 vendor: Intel Corporation ...
0
votes
1answer
125 views

set permission 0666 on /dev files at boot time

I have to load a few additionals modules. One of them generates /dev/knem file. I have to set the permission to 0666, so a basic chmod 0666 /dev/knem works, but I would like to assign it directly at ...
1
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2answers
46 views

CONFIG_PPP_MPPE=m vs CONFIG_PPP_MPPE=y

What is the difference between 'm' and 'y'? I am reading a guide, and the first step is to make sure that my kernel supports PPP and MPPE. It should be: # cat /boot/config-`uname -r` | grep G_PPP= ...