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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Why did iOS have an encrypted kernel? [on hold]

It was recently reported that the upcoming version of iOS has stopped storing the kernel encrypted on the device storage. The piece suggests that this might be a mistake, because it weakens the ...
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1answer
4k views

Kernel data types u8, u16, u32, u64 not resolved

I am trying to compile some files related to wireless subsystem (mac80211) which use datatypes u8, u16, u32, u64. These are not resolved. The header file being referred to is linux/types.h which is ...
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14 views

Lenovo Yoga 700 14ISK Ubuntu Dual Boot Wifi Issue

I bought this lenovo yoga 700 14isk laptop just under a year ago and am trying to dual boot with ubuntu. It appears as though there is a lot of problems with the wifi driver, which carries over to ...
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1answer
3k views

What do these error messages mean and how to fix it?

============================================================== actually I figured out this is an issue of intel video driver:http://lkml.indiana.edu/hypermail/linux/kernel/0902.3/01703.html =========...
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22 views

Compile Linux V4L-DVB media_build for a specific kernel (not the running one)

Is it possible to compile the LinuxTV.org V4L-DVB media_build for a kernel source contained in a specific path, instead of the running one (i.e. a different version)? I have the kernel sources and in ...
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3 views

Ubuntu 14.04: How to let printk print to a specific file

In earlier version of Ubuntu, this can be done by modifying the /etc/syslog.conf file. But now in Ubuntu 14.04, this file is not missing. How can I let printk print to a specific file?
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1answer
23 views

Linux kernel “half configured”

I've been running Debian Wheezy for over a year with no problems until a week ago. For no obvious reason, the system has suddenly decided that the Linux kernel is only half-configured, and none of ...
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1answer
29 views

Why would a Linux computer with no Nvidia hardware get indigestion over an Nvidia kernel?

I'm running Debian Wheezy on a computer with ATI / AMD graphics and no Nvidia hardware. A week ago, with no obvious cause, apt decided that it needs to configure Nvidia graphics any time it runs, ...
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28 views

WinFolder Lock Pro unlock

I am using WinFolder Lock Pro 1.4 software from last two year... but because of some reason I change my win8 to win7. * It's a portable software !!! Now I can't unlock or copy my data folder which is ...
4
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1answer
8k views

What does `apt-get install linux-headers-generic` do

Looking for explanation on apt-get install linux-headers-generic. What does installing linux-headers for a kernel do ? The significance of that command at the time of kernel installation and after a ...
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2answers
4k views

Ubuntu Server 13.10: How to downgrade kernel

Ubuntu Server 13.10 appears to be very unstable, I got random crashes of the system with no apparent reason and nothing is showing in syslog. This is screenshot from the console when the crash ...
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1answer
102 views

Test program to configure MPLS datapath in Latest Kernel 4.1.3

Latest Kernel supports MPLS datapath in kernel, However there is no test program, or any guide how to write user space program to configure a MPLS datapath in kernel. I browse the kernel code and ...
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1answer
41 views

Is there any way to get correct system time without NTP?

I'm developing industrial embedded device on the ARMv7, 3.10 kernel. First, before taking up the main subject, let me talk about hardware time. Amlogic meson8b is core unit, so i used "aml-rtc" as ...
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1answer
48 views

Lots of unwanted packets installed in ubuntu 12.04 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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0answers
21 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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1answer
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 ...
2
votes
1answer
81 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 initramfs-0-rescue-...
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7answers
7k views

Linux distro with just busybox and bash?

I just want a linux distro that boots fast, has a bash terminal (no gui) and busybox. Is there any such distro or is it hard to compile a kernel and just make one myself?
3
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1answer
43 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 ...
0
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1answer
98 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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0answers
108 views

What exactly does acpi_backlight=vendor do

I have an issue when booting Linux with a device plugged to USB 3.0. If there is anything plugged (USB stick, keyboard, …), the system hangs on start with blank screen and does not react even on SysRq....
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0answers
21 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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0answers
101 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 ...
3
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0answers
35 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. https://github.com/saiyamd/...
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38 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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31 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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0answers
17 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 ...
5
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1answer
105 views

WD Green Hard Drive and home linux server

Are newer WD Green Hard Drives still a problem for Linux nowadays? The discussion here is focused on home linux servers, not NAS or data centers. Here is a summary of my research from googling. "...
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3answers
6k views

How do I compress a vmlinux kernel into vmlinuz?

The question is pretty much summed up by the title - I've just built a kernel which has generated the vmlinux output file. How do I compress this into a vmlinuz image?
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1answer
1k views

Kernel-power error, automatic reset the computer

I have a problem sometimes when i run full screen application, sometimes the machines goes automatically to reboot with no warning, I was looking in the event viewer and seems to be a kernel-power ...
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1answer
26 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
11 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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12 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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51 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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20 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 ...
7
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4answers
16k views

Why Centos still not using Latest kernel

As i have seen many changes and improvement in kernel 3.xx The improvement i like is dmcache which introduced in kernel 3.9 I have 3 server with centos installed on all machine Centos is still ...
0
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1answer
469 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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0answers
20 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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46 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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2answers
88 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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votes
1answer
16 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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2answers
3k views

nouveau without KMS

I have nomodeset when I boot my kernel, as I want to switch between nouveau and nvidia proprietary drivers within a session. However, nouveau won't load, complaining that kms isn't enabled (xorg.log ...
0
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1answer
72 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 ...
3
votes
4answers
1k views

Linux kernel, Nvidia: Turning off graphics in Ubuntu

How can you turn off graphics at Ubuntu's GRUB -bootloader such that you can access and see terminal? I have a 5-year-old Nvidia graphics-card which is not anymore compatible with Linux kernel 2..18 ...
0
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1answer
82 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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62 views

Kernel parameter to set framebuffer resolution

What is the parameter to set framebuffer resolution (1920x1080)? With a nouveau driver I didn't have problem with it - now I'm using nvidia (non-free)
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1answer
33 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 http://security.debian....
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0answers
19 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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0answers
57 views

How can I understand what happens to my laptop?

I'm running Ubuntu 14.04 LTS which was recently upgraded to 14.04.03. With that upgrade came a new kernel (i.e. 3.11.0-18-generic) that breaks my X server. If I select a previous kernel version (i.e. ...
5
votes
3answers
5k views

Where's windows kernel file?

What computer file contains windows kernel? is it seen in task manager process list? if not, why?