The main component of most operating systems, the kernel manages most of a computer's communication between hardware and software. Typically, the kernel is the lowest level of abstraction a programmer can have to a resource.

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Lots of unwanted packets installed with apt-get due to typing mistake. How to revert?

In my virtual ubuntu 12.04, I was installing ruby2.3 but by mistake, I have put space in between ruby and 2.3. sudo apt-get install ruby 2.3 It has installed more than 9 GB packages including ...
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10 views

Delete kernel module completely

I would like to ask you how can I delete some kernel module completely? I mean really delete, not unload or prevent to load. I tried to use rmmod, but it just unloaded module, same as modprobe -r. So ...
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19 views

How a kernel is ported on hardware?

In smp schedulers, a scheduling daemon is run on every core, actually i want to know how this is possible that (NBR_CORES) copy of a program run separately on different cores? (I'm new in kernel and ...
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1answer
19 views

how to create rescue initramfs image on centos 7?

After my last launch yum update my test box have kernel-3.10.0-327.13.1 installed. While installing, dracut generated initramfs-3.10.0-327.13.1.el7.x86_64.img, but ...
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36 views

Windows 10 Kernel-Power 41 error after go to sleep

I have a recurring problem with my ASUS G56JR notebook under Windows 10, somehow the the system crashes after to go sleep. When I awake it, the eventlog shows the following: I read a guys problem ...
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32 views

CPU cores remain offline after hotplug

When my UPS triggers an "on-battery" event, I want all cores to switch off to conserve power. The PC has 8 cores on two chips, UPS batteries need replacement every 3 months because of high current ...
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17 views

What happens if you start ntoskrnl inside a running windows?

What would happen in the event that you started ntoskrnl.exe inside a running windows that is not sandboxed? It would work in a VM since you can VM windows. I cannot find anything online about it ...
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59 views

Grub does not pick up new kernels (was: How to update Fedora's kernel)

In a seemingly endless quest to get Vagrant working I am trying to update Fedora. Vagrant needs VirtualBox, VirtualBox needs kernel sources, and kernel sources are only available for the latest kernel ...
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22 views

How to generate soft lockup in Linux Kernel and how to verify?

I was testing soft lockup recovery procedure of Linux Kernel. I set /proc/sys/kernel/softlockup_panic to 1. And I created a Kernel module as described in the link below. ...
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23 views

Updating the kernel on a Linux Mint Live USB

I'm following this guide: https://community.linuxmint.com/tutorial/view/1784 to update a Linux Mint ISO. Specifically, I'd like to update the kernel of this version of Mint to 4.4.8. For kernel ...
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20 views

Linux RT vs 'niceness' priority and preemption

I wanted some clarification on the differences between real-time linux process priority (-99 - -1) and normal user-level 'niceness' (0 - 40) priority, and the effects on scheduling and pre-emption. ...
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10 views

Control Linux kernel multi cpu usage at boot

I am developing a mobile system, that has certain limits in power consumption. The system has for example 4 or 8 cpu cores. If running, the total power budget is usually low due to idling of most of ...
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25 views

why does asynchronous I/O require buffering?

I read in some introductory lecture notes on I/O and operating systems that "asynchronous systems require buffering". Why is it so please? Cheers
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1answer
10 views

Why X-s restarts after magic Alt+SysRq+REI?

Just curiosity: Which part of my debian is responsble for immediate restart of my X-s after I press Alt+SysRq+REI? ("I have just killed every process - why I have forthcoming "Choose your username" ...
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10 views

ALG IPSEC and RSTP

I have linux 3.18. my Linux is installet on a router. in this router I activate a NAT from the wan side. Does this Linux support ALG of IPSEC and RSTP ?
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17 views

Mach_kernel twice gone missing on iMac Lion x.7.5/El Capitan X 11.3

iMac 2009, seriel VM9228X9259, 8GB RAM INTERNAL harddrive is the 500GB, which is slowly dying, but still working. OSX 7.5 This was the first to lose its mach-Kernel, from manual shutting down to ...
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15 views

NanoPi2 external wifi dongle doesn't go UP

I've got a NanoPi2 (it has an internal wireless card embedded) and I'm trying to configure another wireless device (usb) because I need two wlans working both at the same time. I know that the ...
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1answer
320 views

Install Virtualbox on Linux Mint 17.3 with upgraded kernel 4.4

Fresh Linux Mint 17.3 install on a Thinkpad T460. Upgraded kernel from 3.19 to 4.4.0-15 to get WiFi working. Now can't get Virtualbox to run. I need Virtualbox to run Vagrant. Error! Bad return ...
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37 views

System went to sleep last night for no good reason

I've recently built a new computer running windows 10 with x99 motherboard and for some reasons my Windows went to sleep mode last night for no good reason. When I woke from my sleep the computer ...
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16 views

I am trying to get Ubuntu 12.04 to run on my Nook simple touch, but it keeps throwing me the error below

This is the error it keeps throwing me `Fatal kernel too old` My kernel isLinux localhost 2.6.29-omap1 #27 PREEMPT Thu Sep 27 19:12:38 CEST 2012 armv7l GNU/Linux Could there be something wrong ...
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2answers
81 views

Grub not listing the new kernel while booting

I recently updated my kernel on CentOS 6.7. That also cleaned up all the older versions, which also updated my /boot/grub/grub.conf, it has a single entry (of the new kernel). Now, when I rebooted, ...
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15 views

Docker images and the kernel

have just spun up a docker image which is running Ubuntu 15.10 on my own machine which is still on 14.04. From what I have read, docker containers use your existing systems services, including the ...
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55 views

Linux very slow and uresponsive - linux swapper process high usage

My laptop with archlinux kde5 is slow and unresposive, to do all task, open chrome or dolphin, etc. and sometimes freezing for 10-30 seconds like if i have a lot cpu usage, i try with different ...
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1answer
70 views

Installing new kernel based on DEB's

I'm trying to test a proposed kernel for Launchpad Issue 1556562: VIA C7-D machine "kernel NULL pointer dereference" in skcipher_recvmsg_async. The proposed kernel is provided as a collection of DEB ...
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30 views

Change debian kernel had no effect

I upgraded my virtual machine from Wheezy to Jessie using debian provided help. The last step was to install new kernel do I did. > apt-get install linux-image-amd64 Get:4 ...
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14 views

How can I reserve hotplug bridge's memory only for prefetchable memory using the Linux kernel command line?

I have been trying to reserve more bridge memory for PCI hot plug devices using the kernel command line option 'pci=hpmemsize=256M,realloc'. This ends up causing an issue for non-prefetchable memory ...
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16 views

System Hold on Starting INIT Version

after replacing motherboard as you see in this screenshot Kernel startup complete. Starting INIT version 2.84-gemdev-v008... And than INIT did not start, system doesnt do anything after this ...
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12 views

linux kernel scheduler's load balance acting weird

The machine i’m running on has intel i-7 processor – which has four hyper threaded cores – which means 8 logical cores . I forked 100 identical process that run in an infinite loop doing sqrt() – ...
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87 views

pf-kernel repository for ubuntu

I looked for a long time, and never found a pf-kernel repository for Ubuntu, sometimes I find some compiled pf-kernels on the net, like this website who provides some compiled pf-kernels for Ubuntu ...
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40 views

Get custom kernel parameter variable of booting qemu

Im currently using qemu on windows for testing my own linux distribution. its a embedded version built with buildroot. After building the distribution i have created a iso file. When i start the ...
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1answer
60 views

Kernel panic reports. Fans max speed. Frozen mac.

My computer keeps shutting down unexpectedly, and also freezes sometime, followed by either unresponsive sleep mode, or shut down. Also fans run at max speed usually before it clashes. I keep getting ...
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32 views

How should I configure my Linux kernel (running on armhf architecture) if I want to use the NAT-table in iptables?

I successfully compiled a Linux kernel (version 4.4) with nat support for my desktop computer that runs on a x86-processor. Now I want to do the same for my server which has an ARMHF processor. The ...
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35 views

Running VirtualBox on Fedora

I am trying to install VirtualBox on fedora 23 When trying to start a VM I get the error "Kernel driver not installed (rc=-1908)" My kernel version is 4.3.5-300.fc23.x86_64 I have tried following a ...
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264 views

Red Hat Kernel panic - not syncing: Attempted to kill init

I'm not very familiar Linux and I would really appreciate a bit of help. I manage Windows servers and workstations. We have one Dell T7500 workstation which is running Red Hat 6.5. This workstation ...
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20 views

Flashing Linux on Ncommputing L300 board

I have a bunch of L300 Thin client nodes which are of now use to me any more. I plan to give away the units after flashing linux into them, because as a standalone device wont achieve achieve ...
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1answer
30 views

Building the Kernel

When I build/compile a Kernel, I do so from /home/username/build. Upon completion there is obviously a Kernel directory in the /home/username/build directory. This directory is huge! My question, ...
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9 views

linux load balancing between two “neighbors” on the same core

Linux scheduler uses sched domains and sched groups in order to achieve load balancing between the cpus of the computer. My computer has i-7 processor which have 4 hyper-threaded cores - which means ...
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140 views

Why does Windows not need a low latency or real time kernel

All Linux distros have problems with latency when audio recording , gaming ,etc. But the Windows kernel can be used for audio recording , gaming or anything without a delay. Why does Windows not need ...
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89 views

Disable WLAN as kernel boot option?

I have a CubieTruck Plus (CubieBoard5) running Linaro. It has an ethernet port and wifi card. I want to disable unneeded services and reduce power, so I want to stop anything related to wifi and wlan0 ...
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68 views

gpu install fail - kernel configuration is invalid

I have been struggling to get an nvidia gpu installed remotely on an ubuntu 14.04 system. I blv. I have deactivated the nouveau login correctly and now hit 'kernel configuration is invalid'. I have ...
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52 views

BCM4331 Installation issues on FreeBSD 10.2

I have been unable to find the 'right' 64-bit XP drivers to use ndisgen to create a working module -- I can get it to recognize the card but it has exit errors there are always IRQ and memory leak ...
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30 views

How to see Kernel Oops/Panic? and provide “proof”

I'm doing this assignment and I'm kind of confused on providing proof for kernel oops/panic static int __init hello_init(void) { printk(KERN_INFO "Hello world!\n"); return 1/0; ...
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59 views

Kernel threads and process virtual address

If the kernel is spawned as threads and resides in the memory then how could the ps command identify them if those are not normal process and i give you more look here: root 2 0 0 ...
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166 views

Memory heirarchies and kernel boot options

I'm booting a Ubuntu 14.04.3 LTS server on a Core-i5 T5200U machine with kernel boot options agp=off ipv6.disable=1 intremap=no_x2apic_optout biosdevname=0 audit=0. When I inspect dmesg, I see the ...
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45 views

On which version of Linux Kernel the usb enumeration changed?

Grettings. I'm trying to build a new and customized version of linux using LFS guides and etc. The thing about doing this is because I'm trying to build a linux kernel where the usb enumeration was ...
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60 views

How to solve Kernel discrepancy

I am running Centos 7, when I tried to upgrade the kernel or check the version it shows me an older version running. Yet it seems the newer one is in place and installed. Any idea how to fix this ...
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49 views

Sleep and restart issue related to registry or BIOS

I have been looking all over the internet for about half a year now.. Before: 1. Installed many antivirus programs 2. sucked (AVG) so I uninstalled it 3. AVG gave me MacAfee AntiVirus while ...
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44 views

how to deal with there is no tpm_tis.ko?

I am ready to develop an application with TPM. But after turning on TPM chips enabled in the bios,there is no tpm_tis.ko in the /lib/modules/3.16.0-59-generic/kernel/drivers/char/tpm/ directory. So, ...
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2answers
162 views

Ubuntu 15.10 modified kernel module won't load - must be done manually

A module called alx, which drives my Qualcomm AR8161 Ethernet, loads up on boot and is visible with lsmod. This module is buggy. I found the patches, download the source code for my running kernel, ...
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15 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 ...