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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rtnetlink No such file or directory error For Red algorithm

I tried the following command on my Ubuntu 14.04 Virtual Machine: tc qdisc add dev eth0 parent 1:1 handle 10: red limit 400000 min 30000 max 90000 avpkt 1000 burst 55 ecn adaptive ...
2
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1answer
913 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 ...
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2answers
30 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?
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1answer
12 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 ...
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2answers
16 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 ...
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0answers
9 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 ...
5
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1answer
344 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 ...
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4answers
21k views

Determining cause of Linux kernel panic

I'm running an Ubuntu 12.04 derivative (amd64) and I've been having really strange issues recently. Out of the blue, seemingly, X will freeze completely for a while (1-3 minutes?) and then the system ...
2
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1answer
3k 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 ...
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0answers
19 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 ...
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31 views

rts5139/rtsx_usb borked in 3.15+

Some time in 3.15, someone moved the rts5139 driver out of staging (I cannot find a changelog of this) and it got renamed to rtsx_usb. This, unfortunately, broke support for at least the RTS5139 card ...
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31 views

Missing macros for VSYSCALL in Linux 3.16.4

I am running Arch with kernel version 3.16.4. I need to compile a kernel module for running Intel Vtune '13 (r17). GCC reports the following: ...
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2answers
2k views

debian does not detect serial PCI card after reboot

I have installed a PCI card with two serial and one parallel port on it. the chipset is MCS9865. I downloaded the latest driver(V1.0.12) from here. I ran make and make install. now the two serial ...
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0answers
17 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 ...
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2answers
93 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 ...
8
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1answer
369 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 ...
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0answers
37 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
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1answer
30 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 ...
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0answers
30 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 ...
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1answer
24 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 ...
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0answers
22 views

Failing to load a module on udev event

I have a pretty simple udev rule which is executed when a USB is plugged into my Debian machine: SUBSYSTEMS=="usb", KERNEL=="sd?", ACTION=="add", RUN+="/usr/local/bin/USB/t.sh \ %k" My t.sh is also ...
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2answers
47 views

Is it bad to have too many Kernel modules?

I'm trying to compile a Linux kernel to debug an issue I have on Arch Linux, and I was configuring modules, but I didn't know what a lot of the stuff was so I left them on. If this kernel works I ...
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2answers
2k 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: ...
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0answers
37 views

Get KERN_DEBUG messages into syslog on rhel7/centos7?

I've been trying to get KERN_DEBUG messages logged to a file in centos7, but have had no luck. I can get them just fine from "dmesg," but not /var/log/messages or /var/log/dmesg Here's a MWE kernel ...
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0answers
115 views

Configuring VMware 7 Workstation on Fedora 20 x86_64 KDE

When I first time around installed VMware, it Installed successfully and when I ran the program it got me to where you have a dialog box to select the kernel module, now when I install it the program ...
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0answers
170 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 ...
2
votes
1answer
41 views

How to see driver parameters?

Drivers often support various parameters. For example NIC driver e1000 supports flow-control (FlowControl) or auto-negotiation (AutoNeg) parameters. Is there a way to see which parameters were passed ...
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0answers
34 views

2.6.35 usb-serial kernel patch

I am working with an ARMV71 chip, with embedded Debian 2.6.35.9 - However, the entire source tree of linux-source-2.6.35-9/drivers/usb/serial seems to be buggy. Trying to make the module ...
6
votes
1answer
53 views

What Linux kernel features does os-prober require to find a Windows 8 installation?

I built a new custom Linux kernel using make localmodconfig and after booting the new kernel, update-grub doesn't detect my Windows 8 installation. My distro kernel (with tons of modules I don't ...
2
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0answers
63 views

lz4 Kernel Module in CentOS without recompiling

I just installed CentOS 7 on a vServer to play around with. Usually I use Debian. Since I had good results, I want to use zswap. I enabled it by putting zswap.enabled=1 zswap.compressor=lz4 in the ...
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0answers
65 views

USB Keyboard Hotplug Module not Working

The following module could be compiled and loaded without any error: #include <linux/module.h> #include <linux/kernel.h> #include <linux/usb.h> #include <linux/usb/input.h> ...
3
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1answer
59 views

How do I persistently load a kernel module in Fedora 20?

I have successfully followed the instructions for setting up 802.1q VLAN tagging in Fedora. Now I need to make sure that when I reboot the 8021q kernel module is loaded again. Should I be doing this ...
3
votes
1answer
59 views

Module marked (F) in /proc/modules

On my 3.10 system some of modules listed in /proc/modules are marked (F). I'd like to find the cause of this (F). I am sure modules were not forcefully loaded and were built with the Kernel. Could ...
5
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4answers
3k views

How to determine which module taints the kernel?

My kernel keeps panicking when connected to a certain wireless network. I'd like to send a bug report but my kernel is apparently tainted. From /var/log/messages: Apr 17 21:28:22 Eiger kernel: ...
2
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1answer
3k views

Unable to load module: Disagrees about version of symbol module_layout

Following this tutorial to write my first driver. The Makefile is: # Makefile – makefile of our first driver # if KERNELRELEASE is defined, we've been invoked from the # kernel build system and can ...
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0answers
14 views

LVM2 Mirror Support Missing from Kernel after System Migration

I had a system that was running on a small netbook that had LVM2 set up to group two external USB hard drives into a volume group, and to use that volume group to create a mirrored logical volume. ...
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0answers
76 views

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
13k 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
72 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
28 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: ...
0
votes
0answers
154 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
votes
1answer
77 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
votes
2answers
76 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
48 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
20 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
2
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2answers
205 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 ?
3
votes
1answer
48 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 ...
8
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2answers
4k 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.
2
votes
2answers
233 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
26 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 ...