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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744 views

I can't find tape device file inside /dev directory

I'm using tape storage drive HP LTO3 1x8 auto-loader which is connected to my server running CentOS. it is detected in CentOS correctly. cat /proc/scsi/scsi Host: scsi2 Channel: 00 Id: 01 Lun: 00 ...
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3answers
361 views

What is the difference between a linux package and a linux module?

when I do dpkg --get-selections or less /proc/modules I see two different list. I don't understand the difference between the elements of each...
4
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1answer
1k views

FedUp, unable to upgrade to Fedora 20

I am upgrading my Fedora OS to the latest version 20 as the current one is nearing end of life. Fedora introduces a new upgrade method called FedUp that allows user to perform an upgrade over the ...
3
votes
2answers
600 views

How can I load a module at runtime?

I just compiled the qcserial module which is a driver module for a Gobi USB modem. Now I have a couple of questions. Now I have two files: drivers/usb/serial/qcserial.ko and ...
3
votes
2answers
979 views

Kernel module parameters vs /sys/class/… explanation

I was making (my first) kernel module to play with the gpio pins of my pandaboard and interrupts. Already "built-in", I noticed you can do (briefly) cd /sys/class/gpio echo 138 > export # a file ...
3
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2answers
2k views

Wheezy: how to actually blacklist ehci_hcd?

I'm installing wheezy on a Thinkpad T41. Those are known to have USB2 related problems, which can be avoided by not loading ehci_hcd. But I can't figure out how to actually prevent ehci_hcd to get ...
2
votes
1answer
1k views

GRUB2 Insert additional kernel modules

GRUB2 doesn't have the menu.lst file. How do I configure a boot script. During boot, I hit E on the kernel image that I want to modify and make my modifications. But I would prefer to make the ...
3
votes
1answer
2k views

Error compiling FTDI VCP drivers: Cannot find version.h

driver installation fails of FTDI VCP driver during make install. Running ElementaryOS with kernel 3.11.0-14-generic make install awk: cannot open ...
2
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0answers
196 views

How can I automatically include all firmware needed by selected Linux kernel modules

I have certain modules which I need compiled into the kernel. Some of these modules require firmware, which used to be automatically included from /usr/src/linux/firmware/. However, no new firmware ...
4
votes
2answers
394 views

How can I prevent iptables from counting bytes and packets on empty chains?

Background I occasionally have firewall rules that I need to use for maintenance windows, but don't want active (and therefore consuming CPU cycles or slowing the network interface) the rest of the ...
2
votes
1answer
635 views

How to create Linux header for newly compiled kernel?

In Debian when I want to compile my kernel module I need to install linux-header-* package and then I need to write some makefile like this: obj-m := hello.o KDIR := /lib/modules/$(shell uname ...
1
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1answer
541 views

Archlinux not configured with iptables

I have been trying to set up iptables on my archlinux server, however when I run iptables -nvL I receive the error iptables v1.4.20: can't initialize iptables table 'filter': Table does not exist ...
1
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1answer
57 views

The curous incident of the missing ppa.ko in debian 3.11 kernel?

Ok. Running a version of LDME with a kernel of 3.11-2-amd64 ( basically debian testing). Suddenly with the installation of this particular kernel the module ppa.ko is gone. Further an apt-file search ...
1
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0answers
94 views

What are the generic-pae directories in /lib/modules?

When listing the content of the dirctory /lib/modules I see a list of generic-pae directories (Ubuntu 12.04): drwxr-xr-x 4 root root 4096 Apr 23 2012 3.2.0-23-generic-pae drwxr-xr-x 5 root root ...
1
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2answers
99 views

Does modprobe.d blacklist always need the prefix “blacklist-”?

In the german Ubuntu-Wiki it says, that the name of a blacklist in modprobe.d can be chosen as prefered but the filename has to begin with "blacklist-". Is that right? Because in a forum I read a ...
2
votes
2answers
7k views

Building example device driver error: insmod invalid module format

I am following the tutorial @ http://www.embeddedsystemonline.com/home/embedded-system/embedded_linux/lab3-linux-device-driver on step #7 of this tutorial, $ cd ...
23
votes
4answers
5k views

How to find the driver (module) associated with a device on Linux?

On Linux, given: a device, for example /dev/sda, and its major and minor numbers, for example 8, 0, how can I know which module / driver is "driving" it? Can I dig into /sys or /proc to ...
3
votes
1answer
127 views

Finding a char device in /sys using a Bash script?

I have one of these and I am trying to write a Bash script for finding the device path in /sys. My approach goes something like this: start in /sys/modules/usbled since this is the name of the ...
3
votes
1answer
2k views

How to make EDID

I read the post here and I tried to make do with what I understood from the post but here are some questions: Where is the /lib/firmware located in for example /usr/src/linux/lib/firmware or ...
1
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0answers
52 views

Why linux is a monolithic kernel, while you can load/unload modules (e.g. drivers)? [duplicate]

Hybrid- and Microkernels are flexible, in the way one can add any higher-level functionality as a module, is it not the same for linux kernels? Why then linux is called a monolithic?
2
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0answers
515 views

Debian Wheezy USB2 ehci_hcd

I have a friend who decided to switch to Linux from Windows. I was helping her to get up and running as quickly as possible but we ran into a problem which I can't seem to solve. She uses Debian ...
0
votes
2answers
2k views

FATAL: Module p80211 not found. RTL8192CUS WLAN regression under antiX 13.1 (Debian Wheezy)

The problem concerns a driver support regression for the RTL8192CUS WLAN chip under antiX 13.1, a Debian Wheezy (stable) based distribution. The chip actually resides in a Edimax EW-7811Un 802.11n ...
1
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2answers
2k views

error: “net.inet.ip.fastforwarding” is an unknown key

I've been doing some research into improving performance for OpenVPN and I found out about setting fastforwarding to 1 but when I tried I got the error error: "net.inet.ip.fastforwarding" is an ...
-1
votes
2answers
86 views

Make a new sniffer [closed]

How can use the Linux-kernel to supervise what is going on, about the new connections, new ports, connected hosts? Like I will do a new sniffer. Which files should I monitor to know what is going ...
1
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2answers
137 views

Easiest way to upgrade my onboard NIC drivers on a machine without connectivity?

I was assigned a workstation where I work and I needed to install Debian on it. I chose Wheezy because the other machines I use also have it, but I ran into a problem. The workstation is a Dell ...
2
votes
1answer
453 views

TUN/TAP Will not load

I have an OpenVZ server but can't seem to get the tun/tap module to load. I ran modprode tun on the hostnode but when I go under the VM I get: Tue Sep 24 03:08:36 2013 Note: Cannot open TUN/TAP dev ...
0
votes
0answers
326 views

How to compile video4linux for ARM?

I would like to use a webcam using a Linux over ARM board. Through reading, I have discovered video4linux so I would like to compile it for ARM. My unique notes are: git clone ...
7
votes
1answer
3k views

How to disable keyboard?

Without unplugging my keyboard I'd like to disable it from the terminal; I was hoping that this could be done using rmmod but based on my currently loaded modules it doesn't look like it is possible. ...
1
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4answers
2k views

How to show loaded kernel modules inside OpenVZ virtual server

I am trying to find out what kernel modules are loaded inside a OpenVZ virtual server. Command lsmod is empty and I believe the reason is the way how OpenVZ's virtualisation is working. Specifically, ...
4
votes
2answers
2k views

What is the sequence loading linux kernel module on startup? How priority is set to them?

I have a Linux kernel module which I compiled dynamically. How is it added to startup? There are lot of .ko files in /lib/modules. How is priority set for loading these modules?
4
votes
3answers
930 views

How do I know which kernel configuration option enabled my driver?

TL;DR: when I was trying to compile a driver for USB DAQ device I have reconfigured the kernel. The driver refused to compile under the default distro's kernel but everything works with my tweaked ...
1
vote
1answer
517 views

Kernel module blacklist not working

I'm trying to figure out how to blacklist modules, and I'm trying it on the usb storage. Unfortunatelly it seems ot have no effect, and I get the module in even if it's not used (apparently). My ...
1
vote
3answers
291 views

Does a fault in a kernel module necessarily result in a system crash?

Or is it possible to overcome the fault, since the code isn't in the monolithic part of the kernel?
0
votes
1answer
60 views

How can I change a module kernel version to a custom version so that it gets loaded on an ARM board?

I'm hacking on an ARM926 based board, with a custom kernel based on 2.6.30. I've got a program that needs a specific kernel module but since I have no kernel source I can't compile the module I need ...
0
votes
1answer
105 views

install a kernel module into BeagleBoard (BB)

I want to install a kernel module (For example "Hello world") on the BeagleBoard(BB). (The installed OS on the BB is an Ubuntu Linux). If anybody already worked on this could you suggest me a step by ...
-1
votes
1answer
602 views

removing kernel modules not working for some modules [closed]

unfortunately i couldnt install a machine with minimal installation as a virtual machine ,so i am trying to prevent loading of unwanted modules from kernel using blacklist file. Added following to ...
3
votes
1answer
1k 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 ...
5
votes
1answer
2k views

Cannot remove or reinsert kernel module after error while inserting it without rebooting

I am learning how to create kernel modules and it was all working fine: I compiled, inserted the .ko with sudo insmod cheat.ko, and the printk messages inside the init function (set by module_init) ...
1
vote
1answer
692 views

Installing a platform driver

I have recently acquired a device driver for an integrated watchdog timer on a x86 board on which I am running a minimal Linux system. The kernel is 3.6.11 and it has been built using buildroot. My ...
1
vote
1answer
577 views

How to set up a blacklist for insmod?

I want to block a certain driver module from loading in the linux kernel. So I created a file in /etc/modprobe.d/cdc_acm.conf. In this file I added the following line: install cdc_acm /bin/false ...
2
votes
1answer
7k views

Excluding kernel modules through /etc/modprobe.d/blacklist.conf does not work

I don't want to load the kernel module nouveau on my debian box at startup, so I put the following in /etc/modprobe.d/blacklist.conf: blacklist ttm blacklist drm blacklist nouveau I even did a ...
2
votes
1answer
5k views

I need a step by step guide to build kernel modules in ChrUbuntu

I don't have experience building kernel modules. And worse, I'm trying to do it on ChrUbuntu, so it seems that I cannot follow the existing Ubuntu guides. For example, this command fails: # apt-get ...
3
votes
2answers
12k 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
vote
1answer
1k views

Assembly files in obj-m list when building kernel modules

I'm trying to build kexec as a module, but I'm running into a weird problem. My obj-m is: obj-m += kexec.o machine_kexec.o relocate_kernel.o When I run the makefile, it complains that there's "no ...
1
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1answer
606 views

Can kexec be built to a standalone binary, to be used where kexec was not built into the kernel?

I have remote embedded Linux devices I am trying to update to a new kernel without having to physically access. However, the command line options they boot with make one of the MTDs read only - I ...
2
votes
1answer
429 views

Integrating custom kernel module into Debian

I've built a kernal module from source and now would like to load the module at boot. The .ko file is in the build directory in my user folder, and I know it works because running insmod ./vizzini.ko ...
1
vote
0answers
84 views

Decreasing mouse sensitivity at kernel level

I have developed a custom-GUI Server, which runs on virtual console of Linux.For mouse-handling purpose, it reads the mouse device file /dev/input/mice and retrieves the event data and updates ...
1
vote
1answer
480 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 ...
1
vote
2answers
376 views

Does linux modules/drivers belong to kernal space or user space

Some articles say that modules/drivers belong to kernel space as it take part in forming the kernel; (reference: http://www.freesoftwaremagazine.com/articles/drivers_linux) While others say that ...
4
votes
1answer
2k views

List of packages managed by DKMS

How do I get a list of packages (and their versions) managed by DKMS so I can easily add/remove them?