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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1answer
374 views

How do I install freeBSD headers ?

I have been a arch linux user for the past 2 years and now moving on to freeBSD for kernel development. I have install freeBSD and want to compile a dynamically loadable kernel module for freeBSD. ...
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0answers
47 views

Fair traffic classification using TC

I want to apply a qdisc I developed on myself (quite similar to netem. Think netem.) to several IP-addresses using the filter classifier. No problem this far, I could do so using the prio qdisc or HTB ...
1
vote
1answer
142 views

web cam starting hangs os

I faced a strange effect as ... when my notebook wakes up from suspend I can start and close my web cam with guvcview 1-3 times; But after while on 3dr or 4th starting attempt (I didn't count for sure)...
2
votes
1answer
456 views

Do I have a dead NIC?

OK so this is kind of a long one due to command output. Not necessarily in complexity as I'm only showing some basic t-shooting so any feedback would be appreciated. Basically, I have a fairly new ...
0
votes
1answer
123 views

lsmod lists only one single module, no other modules available to load, how do I proceed?

The system debian wheezy, platform ci20, stock imagination kernel 3.0.8. the output of lsmod lists only one module, pvrsrvkm, which is the "out of tree graphics driver" by imagination. The problem ...
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0answers
7k views

How to install Realtek RTL8723BE wireless driver on debian?

I installed Debian Wheezy 7.8 on a Lenovo G50-70 x64, it seems that I don't have the driver for my wireless card installed, the output of iwconfig: lo no wireless extensions. eth0 ...
2
votes
1answer
802 views

Loading kernel modules that were compiled for another kernel failed

I want to load kernel modules, ip_gre.ko and gre.ko, on a embedded-device running embedded-linux to make that device to support GRE protocol. Since I do not want to change Embedded-linux device's ...
1
vote
1answer
891 views

What's the difference of `/etc/modules-load.d` and `/etc/modules`?

I red the introduction of them and found that, they both deal with module loading during boot time. So, what's the difference of these two different configuation ways?
3
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0answers
166 views

How to insert a modified ELF loader given the current ELF loader is present?

I need to modify the ELF loader's kernel implementation of an Ubuntu 14.04 distribution. Having downloaded the sources using: sudo apt-get source linux-image-$(uname -r) I ran the configuration ...
0
votes
1answer
171 views

Sunix Low Level Parallel port driver not working

Background: I am currently in the process of updating a Industrial PC + software from Debian 4 (etch) to Debian 7 (Wheezy) due to hardware obsolescence, one of the few pieces of hardware being shared ...
0
votes
1answer
49 views

Is it safe to upgrade kernel manually on a system which is using NVIDIA drivers?

Upgrading kernel manually on Ubuntu 14.04 can cause trouble with NVIDIA drivers? (one of the troubles could be booting to black screen) I had lot of trouble with installing NVIDIA graphics drivers ...
0
votes
1answer
248 views

Trying to make a Universal Makefile

I'm working on my own netfilter module for the first time. According to internet documentation, The simplest module contains the following C code: //'Hello World' kernel module, logs call to ...
1
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1answer
456 views

Few questions about system calls and kernel modules (kernel services in parallel)

I have few questions about system calls and kernel modules. Let's assume we have two applications (A and B) and each of them is running on a different core. (A-CPU 0, B-CPU 1) When two applications ...
2
votes
1answer
276 views

modinfo when a module was compiled into kernel statically wouldn't work — workarounds?

modinfo is rather useful tool when it comes to tweaking module's parameters (at least discovering what options are availalbe), for e. g.: $ modinfo dummy filename: /lib/modules/2.6.32-openvz-...
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2answers
1k views

Buildroot - missing i2c kernel modules

I've used Buildroot to build a minimal operative system. During the configuration step with the menuconfig utility I specified to install I2C tools. The option was is Target Package -> Hardware ...
10
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2answers
9k views

How to list all loadable kernel modules?

I'm looking for a few kernel modules to load i2c-dev and i2c-bcm2708. But the modprobe command returns: sudo modprobe i2c-dev modprobe: module i2c-dev not found in modules.dep How can I list all ...
1
vote
1answer
1k views

Compiling kernel but doesn't build kernel modules

I am trying to compile a linux-sunxi kernel for my Banana pi. Using this link: http://sunxi.org/Linux_Kernel#Compilation Unfortunately I am getting the following message at the bottom when I am ...
1
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0answers
37 views

Kernel compilation for minimum program execution

Compiling the Kernel requires me to configure modules. I am unsure how to configure a Kernel which only supports following things: Programs compiled with gcc on other machines (glibc). I want to run ...
2
votes
1answer
64 views

What is /proc/filesystems supposed to be and why is it different from /lib/modules/linux_ver/kernel/fs?

The very little documentation about /proc/filesystems says it is a "list of supported file systems". I see a lot of file system modules in /lib/modules/linux_ver/kernel/fs, most of which do not appear ...
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0answers
116 views

keyboard still working after calling free_irq(1, NULL);

I'm developing a kernel module which free the IRQ number 1 in order to disable the keyboard in Intel architectures. according to wikipedia the IRQ 1 is used for keyboard. but after building and ...
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0answers
589 views

intel_agp kernel module not found

I trying to use intel embedded HD 4400 graphics. As best as I know, it's need to load i915 kernel module (and the kernel module loader also try to load it) without success because it's depends from ...
0
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0answers
2k views

Broadcom driver on Kali Linux

I recently installed Kali Linux, switching from Scientific Linux. The only problem is my wireless driver, which doesn't want to install at all. lspci -nn | grep Net : 02:00.0 Ethernet controller [...
2
votes
1answer
2k views

How to add an alias to a kernel module?

I'd like to add an alias to a kernel module, e.g. make nvidia-343 available as nvidia on Ubuntu 14.10 with Linux 3.18.1, so that it can be loaded under the alias name and so that the alias appear in ...
1
vote
2answers
837 views

How do compile Linux Driver for Netis WF2190 Wifi dongle for FriendlyARM mini210s?

GOAL I want to install the Netis WF2190 wifi dongle linux driver onto my FriendlyARM mini210s. Environment FriendlyARM mini210s S5PV210 ARM Cortex-A8 Board ... running Linux 3.0.8-FriendlyARM ...
3
votes
1answer
704 views

linux 3.17 supports hotplug of thunderbolt of non-chained thunderbolt devices — what is this?

Linux 3.17 has a commit which supports hotplug of thunderbolt of non-chained thunderbolt devices. But what does "non-chained thunderbolt devices" mean? Is a thunderbolt to ethernet adapter a chained ...
2
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0answers
497 views

How can I find which module driver holds of i2c address?

I want to communicate over a I2C bus using Python. But the address cannot be used because it is used by another driver. # i2cdetect -y 0 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: ...
1
vote
2answers
94 views

How do I find out which version of a driver is included in a kernel?

I need to find out which driver/module version is contained in a kernel which isn't installed. Is there a document in the source that contains this or something listed online that haven't been able to ...
1
vote
0answers
228 views

Which kernel option for “Intel 8 Series Chipset Family Thermal Management Controller”

My new machine works fine, but lshw shows the following unclaimed device: *-generic UNCLAIMED description: Signal processing controller product: 8 Series Chipset Family Thermal ...
1
vote
1answer
19k views

insmod: ERROR: could not insert module 8188eu.ko: Invalid module format

I'm trying to use the TL-WN725N as an USB WiFi-Adapter with Fedora 20. I followed these insructions and the adapter worked fine and even survived two updates during the last few weeks. Then I did a ...
1
vote
1answer
385 views

loading ath9k_htc kernel driver fails

could someone please point me in the right direction to get my external wireless stick (TL-WN722N) working on my Xperia Neo (haida) smartphone? So far I've done the following: I downloaded ...
3
votes
1answer
22k views

rtl8723be Realtek Wifi-Card driver not working on Ubuntu 14.04

I installed Ubuntu 14.04 on my new Lenovo G50-70. The wifi works perfectly in windows, however it behaves strangely on Ubuntu. It is slow, doesn't load heavier sites at all, and after a while, ...
3
votes
2answers
3k views

No build scripts available when compiling module outside of Linux source tree

I am attempting to build a basic module outside of the Linux source tree (3.18.0-rc6). When I build it, I get an error saying it couldn't find scripts/... My directory setup looks like this mymodule/...
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3answers
3k views

Debian Wheezy, issue connecting multiple monitors

I just recently migrated to Wheezy from Arch, everything has gone very well except I can't seem to get multiple monitors to work. Here is my setup: machine: Dell Latitude E6540 laptop graphics: 00:...
0
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0answers
134 views

custom built kernel module problems

I have been struggling to find a solution for loading module ath9k into the kernel and I have met a dead end. The kernel is 3.17.1 taken from kernel.org and I am compiling it in Ubuntu Trusty (14.04) ...
6
votes
3answers
7k views

cannot reconfigure virtualbox-dkms

I have installed vitualbox on Debian Jessie according to instructions on debian wiki. By running: apt-get install linux-headers-$(uname -r|sed 's,[^-]*-[^-]*-,,') virtualbox During installation ...
2
votes
0answers
163 views

How to determine the wordsize in Linux kernel programming? [closed]

In userspace code, the macro __WORDSIZE is used, included in <bits/wordsize.h>. However, when I do Linux kernel programming, the __WORDSIZE seems not available. If <bits/wordsize.h> is ...
1
vote
1answer
904 views

Kino error:WARNING: dv1394 kernel module not loaded or failure to read/write /dev/raw1394 on Fedora 20, dvgrab works

I want to import and work with my dv's which are from a SONY DCR-PC101E camcorder, I've installed alot of Video editing software on one of my systems, namely my Fedora 20 running on an old HP with ...
1
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0answers
171 views

Changing CPU frequency programmatically

I have seen that standard CPU Frequency driver(comes with default package with linux kernel) can change the CPU frequency at runtime, when being used under the supervision of "Ondemand" governor. ...
3
votes
2answers
2k views

Disable KVM Kernel Module while its still in use

In order to run a virtual machine, VirtualBox tells me to disable the KVM kernel module. I googled around and found out that KVM is included in the qemu-*-packages, but none of them is/was installed ...
0
votes
3answers
119 views

Linux Distro name API to get name of linux distro in a driver code?

I am writing a common code in a driver to get the distros name and host name. host name i am taking from struct utsname{nodename[]}, but how do I get the distro name?
1
vote
1answer
180 views

USB Tuner driver not detected

I am using a DVB Tuner, USB tuner. I have added driver to the kernel and it is being registered. But when the device is connected, it doesnt invoke the probe function. Is there anything I have to ...
1
vote
2answers
1k views

Removing a module from the blacklist

How do I remove a module from the blacklist? I need b43 to load on start but journalctl tells me that it is not loading because its in the blacklist. How do I remove it from the blacklist? I'm using ...
0
votes
0answers
67 views

How Do I Reset Modules to Default

Bad form, but I attempted to install a custom module from a project that didn't support an uninstall target. Now I'm getting odd behaviors with kernel panics and brightness zero on boot. How can I ...
1
vote
0answers
522 views

How to display printk messages filtered by level as they come?

I wrote a hello word module that performs a printk when it is loaded in level ALERT and another printk when it is released with level INFO: #include <linux/module.h> #include <linux/kernel.h&...
1
vote
0answers
241 views

How are network and SCSI kernel modules handled differently from other kernel modules?

I used modprobe to load the 8021q.ko module on a server. I expected to have to do this every time the server rebooted until I made it persistent. However, to my surprise, it was loaded automatically ...
8
votes
1answer
757 views

Why do user space apps need kernel headers?

I'm building busy-box and iptables for an embedded device and one of the dependencies for them are the kernel headers. I have searched the whole file system for *.ko files and found none. So i ...
1
vote
0answers
943 views

vboxdrv kernel module

I'm just install virtualbox and when i try to launch the program from the terminal i got this error #virtualbox WARNING: The character device /dev/vboxdrv does not exist. Please install the ...
1
vote
1answer
181 views

Can't losetup anything on armhf NAS

I'm pretty new to linux and chrooted my NAS with armhf architecture and tried looping device: losetup -f losetup: Could not find any loop device. Maybe this kernel does not know about the loop ...
7
votes
1answer
7k views

How can I properly reload a kernel module?

Related Question I can't reload a kernel module for trying new flags. Example: thinkpad_acpi default is without fan_control=1. So if my computer runs really hot and the fans don't go to full speed it ...
1
vote
1answer
492 views

Disable bridge module insert?

I have Fedora 20 setup with default kernel configuration, where bridge feature is enabled as a module (CONFIG_BRIDGE=m), and the bridge module loads as the system starts. I don't understand who ...