This tag is for questions about the internals of the Linux kernel itself - particularly about use or configuration of kernel modules or drivers.

learn more… | top users | synonyms

0
votes
0answers
9 views

ACPI doesn`t work properly?

My PC with next parameters H/W path Device Class Description =================================================== system P5K PRO (To Be Filled By ...
0
votes
0answers
18 views

Linux: Why UID and GID are 0 despite not being the root user?

Just a question here. I was looking through my program and its pid, uid, gid. And I found UID and GID are 0 but I'm not signed in as a root user. Why is this the case? And I am curious if UID and ...
0
votes
0answers
71 views

Kernel 4.4.1-1 fails to boot - root volume “does not exist” - 3.10.0.327 and 4.3.3-1 both continue to boot fine

I'm trying to install and boot kernel-ml (currently 4.4.1-1) on RHEL 7.2 following the instructions here: http://linuxg.net/install-kernel-4-x-on-enterprise-linux-7-centos-7-and-rhel-7/ Install works ...
1
vote
3answers
14 views

How to launch vmlinuz-linux from efi shell?

How to start vmlinuz-linux from efi shell ? I jump into the ESP and type vmlinuz-linux (vmlinuz-linux is in the ESP) but it says vmlinuz-linux isn't recognized as an internal or external command, ...
1
vote
0answers
10 views

How to Disable Linux kernel tracer

I have installed Ubuntu 12.04 (32bit). The current tracer is set as nop. cat current_tracer nop cat tracing_on 0 Although the current tracer is nop and tracing is disabled, all these following ...
1
vote
1answer
31 views

Virtual machine running a *newer* linux kernel?

Is it possible to, for example, have the main system be Ubuntu 15.04 and install a virtual box that runs Ubuntu 15.10 inside of it? Or does the host system have to have a Linux kernel that is at least ...
0
votes
0answers
20 views

Cannot find root device when loading a new kernel image

I am trying to install an old linux kernel image 2.6.32.69 just for learning purposes. The machine is ubuntu 15.10 32 bit. The commands to build kernel are: make oldconfig make bzImage make modules ...
0
votes
0answers
68 views

How do I fix Manjaro error hibernation device not found on boot?

After installing updates and restarting I got these errors. ERROR: resume: hibernation device 'UUID=long number here' not found ERROR: device '/dev/mapper/ManjaroVG-ManjaroRoot' not found. Skipping ...
0
votes
0answers
15 views

Run X window system with CONFIG_VT=n in linux

I have an Arm device that I installed Gnu/Linux on. Unfortunately the full source tree to linux with the patches required to make it work on is not available. There is a close version to the source ...
1
vote
1answer
96 views

sd card not detected at all in linux

My SD card reader is not detecting any SD card. There is no output from dmesg when an SD card is inserted. df does not detect anything and also nothing in fdisk -l. Does linux support SD cards? I ...
1
vote
2answers
452 views

How to install kernel rc rawhide in Fedora?

I am new to Fedora and I decided to try it on my new laptop instead of Ubuntu. I have an XPS 13 (9343) and the sound is not working. I researched online and found out that people had success ...
0
votes
0answers
20 views

Freeze when starting Windriver os

When I start Windriver OS, it always freeze. And it shows this text in console window: acpid: 0 rules loaded <br> acpid: waiting for events <br> Starting advanced configuration and power ...
0
votes
2answers
67 views

What is the exact different between Linux kernel release and version? [duplicate]

In Linux based operating system we can find Kernel release and Kernel version. So what is the exact different between Release and Version ?
0
votes
0answers
105 views

linux bluetooth firmware missing

The kernel is trying to load a bluetooth firmware version that does not exists. dmesg: [ 4.435796] Bluetooth: hci0: read Intel version: 370810011001140d00 [ 4.436742] bluetooth hci0: Direct ...
0
votes
0answers
17 views

How to get config from a EFISTUB kernel?

I am working on getting normal Linux onto a x86 Android tablet. Only kernel I can find is efilinux.efi located inside the system’s ESP (\EFI\Intel\efilinux.efi). But I can’t get config through these ...
1
vote
0answers
215 views

How to upgrade kernel in Ubuntu 14.04?

I want to use Docker on my Linux server for which I need to upgrade the kernel to 3.10 or higher. So following this answer I was trying sudo apt-get install linux-generic-lts-trusty, which results in: ...
5
votes
1answer
75 views

Hairpinning in Linux

I have a router in which I installed a Linux system. I want my router to support NAT hairpinning. Does a such feature exists in Kernel Linux? If yes how to activate it? Are there a patch to apply it ...
0
votes
0answers
38 views

Disable kernel module loading on custom initramfs.igz

my machine, which runs GNU/Funtoo Linux on one of the 2 raid0 arrays it has, needs an initramfs with dmraid support to boot into the system. During the last 7 years i've been using a custom initramfs ...
1
vote
0answers
34 views

Why WiFi drivers carry firmware with them?

Why do linux kernel modules for wireless LANs have 'device firmware'accompanying them while other driver modules don't seem to carry a copy of the firmware with them? Edit: I've been informed that ...
3
votes
1answer
80 views

Why is USB Serial so fast in linux?

I've just started using a 3G modem on a RaspberryPi using the "stock" USB Serial driver from the linux kernel (as indicated in the modem documentation). Once the modem was recognized and appeared as a ...
3
votes
2answers
40 views

Does Installing a driver increase linux kernel memory footprint?

I have read that linux kernel is monolithic kernel and it contains drivers within it, in a single file. For example, I have two linux kernels 3.16.0.40 and 3.16.0.50 Currently booted system with ...
1
vote
1answer
735 views

Problems installing VMware on arch linux

I'm trying to install VMware but when it gets to "before you can run VMware, several modules must be compiled and loaded into the running kernel" I click install, enter my password, and i get a error ...
0
votes
0answers
21 views

User-mode Linux aborts on start

I am attempting to test a modified linux kernel by booting it with UML. I was able to build the kernel without a problem, but when I try to start the built kernel with UML, I get an abort signal, as ...
0
votes
0answers
64 views

kernel(security_netlink_recv) = 0x3a2204c6 is needed

I am trying to install drbd (packages are fetched from elrepo). Both drbd and kmod-drbd are version 8.4.3-1 and I am using CentOS 6.7 with kernel version 2.6.32-573.el6.x86_64. When trying to ...
0
votes
1answer
49 views

udev - change event from udev_device_get_action

I am monitoring the events of all devices connected to the host. Linux has udev daemon , which listens to all the device specific events such as online, offline, add, remove and change. I use a ...
1
vote
0answers
17 views

usb issue, boot not completed; hw or sw issue?

I can't realize whether I'm having a kernel or hardware issue... clicking ctl-d the boot process doesn't come to its end. any hint?
0
votes
0answers
25 views

IOstat command changes in Linux Kernel 4.2

I implemented this IOStat command http://sourceforge.net/projects/iostat/ in Java successfully but it turns out that this command is working only for Linux Kernels between 2.4 and 2.6. If someone is ...
0
votes
0answers
6 views

Custom built Linux kernel automatically reboots after entering my password

Recently I build my own custom kernel. After update-grub I can see the log-in windows, but after I type my password, It suddenly reboots, and I can not see the Ubuntu desktop. And then I reboot as ...
1
vote
1answer
41 views

How are system calls dealt with in a multicore Linux system?

When a thread or process from one core initiates a system call(ex. it can be fork()), the OS goes into kernel mode, assuming that multiple systems calls(ex. maybe also fork()) come in from different ...
0
votes
2answers
86 views

kworker is running modprobe every second

Using fatrace, I discovered that on my computer, modprobe runs approximately every second. To find out why, I replaced modprobe temporarily with this script: #!/bin/bash echo "$0" "$@" > ...
2
votes
1answer
252 views

Centos 7 , cant update kernel

I am running centos-7(vm) on http://www.ovh.com/. My kernel version is 2.6.32-042stab108.8. Even after yum clean all && yum update and reboot. still kernel version is 2.6.32-042stab108.8. Any ...
0
votes
1answer
22 views

Linux kernel working only on kernel mode [closed]

Porting the Linux kernel to an architecture that has no execution modes (is always in kernel mode) and has no MMUs seems like a very unprotected system. Would it be possible to make Linux run in that ...
0
votes
0answers
466 views

Need help resolving kernel panic - not syncing: timeout synchronizing machine check over cpus

I'm attempting to install Xubuntu 15.04 x64 on a brand new high end laptop. I've already fixed a problem with the NVidia cards and needing to set nomodeset on boot but now I get this one kernel panic ...
0
votes
0answers
48 views

Network IO throttling in cgroups

cgroups allow the user to manage the resource usages of processes or groups of processes. Block IO throttling is supported and works well. Why is it however that network IO throttling (specifying hard ...
0
votes
1answer
60 views

Signing Error during kernel compilation

I was trying to compile kernel on my system by following this link http://www.ramkitech.com/2012/04/how-to-compile-kernel-step-by-step.html when I run make command, I am getting the following error ...
1
vote
0answers
47 views

F2FS issue - unsuccessful remove, lost access to files

While removing unnecessary files I bumped into an error. with fsck.f2fs /dev/sda4 -t I can see | | |-- Die Ärzte - Manchmal haben Frauen <ino = 0xc11874>, <encrypted (0)> | | ...
0
votes
0answers
882 views

Program xxx tried to read /dev/mem between xxxxxx->xxxxxx

I've got a program that runs on RHEL 6.5 perfectly fine on a virtual machine generated with OpenStack. But since I updated my version of OpenStack (from Mirantis fuel 5.0 to 6.0) I have a new instance ...
0
votes
0answers
23 views

An interrupt of a DMA(=Direct Memory Access) and a running kernel process

Can an interrupt of a DMA(=Direct Memory Access) stop a running kernel process?
0
votes
0answers
66 views

LFS (Linux From Scratch) USB boot crashing

A hard drive in an enclosure has the following, assume that this drive is being recognized by grub2 as hd0: partitions 1 to 3 are primary partition 1: /boot (boot partition) partition 2: / (linux ...
1
vote
1answer
60 views

How to get mac address of a device using linux without using automatic tools?

I want to know if there is a method to obtain mac address of a protected(wpa 2 ) wifi hotspot or network without using aircrack -ng , airdump-ng,etc. But rather by some basic command.
1
vote
2answers
399 views

Free space in /boot partition with dependency loop

Summarising my problem is that my /boot partition is almost full but I can't free it up due some dependencies loop. Detailed description: I am running a Ubuntu 14.04.2 LTS which has the /boot ...
1
vote
0answers
27 views

How do I compile a module with different active kernel/kernel-after-reboot versions?

Let me explain, I updated my kernel but have to recompile the wifi module to work with the new one. The thing is, I can't reboot and compile, because it's my media server to which I only have access ...
1
vote
1answer
1k views

openSUSE 13.2 kernel upgrade to stable version (4.1)

I have openSUSE 13.2, and I try to upgrade the kernel to the last stable version. I added http://download.opensuse.org/repositories/Kernel:/stable/standard/ to repository and try to upgrade with ...
1
vote
2answers
1k views

Repair bootloader for fedora 22 after install windows

I already have fedora 22 and windows 7 in my machine , i wanna to upgrade to windows 10 but in fact i'm afraid to losing fedora i have read the fedora documentation but still afraid to start this ...
0
votes
1answer
93 views

CentOS 7 image naming conventions

I'm looking at the following on CentOS 7: boot$ ls config-3.10.0-229.7.2.el7.x86_64 config-3.10.0-229.el7.x86_64 grub grub2 initramfs-0-rescue-9fde7dd9a7884e1b8fdef68620955b36.img ...
0
votes
0answers
105 views

How to downgrade kernel of samsung device SM-T230

I am facing a weird problem. My client reported that our game(which is based on cocos-2dx 2.2.6) displays black screen after focus change on one device namely Samsung Galaxy Tab 4 SM-T230 the Log ...
0
votes
0answers
24 views

Can kexec be used to start Linux on a separate partition?

Assume I have two partitions. Each contains a full installation of a different distribution. I know kexec is like using one kernel as a bootloader to start another. But can this process be used to ...
0
votes
1answer
48 views

USB device driver module getting killed while executing insmod?

While running make, it is showing no warnings or errors, but when I am inserting the basic USB device driver module inside the running kernel, then I am getting a "killed" message. Here is my code: ...
0
votes
1answer
32 views

Why an OS has same name on different achitectures?

What is the similarity in running a same OS (like Linux) on different architectures? I mean, we cannot run Linux x86 apps on Linux ARM. And even the OS itself is constructed differently for different ...
1
vote
1answer
21 views

Unable to find linux Kernel Headers

I am running a custom kernel(I am not the creator of it). I need the header files for the same. . I have tried installing the header files using this command. sudo apt-get install ...