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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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 ...
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kernel_task cpu usage 300% plus long press power button to start Mac Air

I'm having Mac Air 13inch 2014 having 4 gb memory and 120 gb Hard disk , from the few days i have been facing a problem that kernel_task is taking 300% of my cpu and my mac is running very slow and ...
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36 views

How is the program divided into pages/segments by os? [closed]

We know that in virtual memory concept the os uses segmentation/paging methods to divide the program into pieces and load them into RAM only when required. So, how does the OS knows to divide the ...
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1answer
50 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 ...
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40 views

Kernel Data Inpage Error

I started getting this "BSOD" error a few weeks ago, and I have no idea how to find out why... It happens at random times and events so I have no idea what's causing it. I did a google search a few ...
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107 views

Opensuse 13.2 kernel upgrade to stable version (4.1)

I have opensuse 13.2, and i try to upgrade kernel to last stable version. I adding http://download.opensuse.org/repositories/Kernel:/stable/standard/ to repository and try to upgrade with sudo ...
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40 views

Where to get the kernel source directory Kali Linux

This is a branch off of this question: Installing new driver on Linux, missing the 'Build' directory Since the PC has no internet I can not use apt-get to rebuild the kernel and get the ...
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16 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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53 views

Kali Linux will not boot from USB, terminal asks for kernel image

I have been trying to boot Kali Linux from a USB. I have turned the USB bootable with the newest 64 bit Kali ISO and Universal USB Creator or whatever it was called, and it seems to have worked just ...
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21 views

ethtool or mii-tool support for kernel 2.6.24

I have a embedded system that has kernel version 2.6.24. I want to use ethtool or mii-tool in this system. I cross compiled ethtool package for powerpc mpc8250 cpu. when i use ethtool, I get ...
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22 views

Copy On Write will stop working with Docker?

I have been using Docker with great pleasure, but there is a question that concerns me and for what I have found not explanations on the Web. In a "normal" GNU-Linux server, executing different ...
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1answer
20 views

I need to calculate time of booting RPI using Watchdog? Can any one help me please

The boot sequence of the Raspberry Pi is basically this: Stage 1 boot is in the on-chip ROM. Loads Stage 2 in the L2 cache Stage 2 is bootcode.bin. Enables SDRAM and loads Stage 3 Stage 3 is ...
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43 views

OSX 10.9.5 running very slow

I have Macbook Air having Memory 4 Gb and Intel i5 Processor, it is running very slow as no application is opening and if it opens it freezes and its very hard to work over it , I check the Activity ...
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1answer
155 views

Mac hangs indefinitely at shutdown

When I reboot my mac running Yosemite, all the applications will quit, the desktop icons disappear, but then the computer hangs indefinitely. The desktop background and dock are still visible and the ...
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1answer
95 views

Is it possible to run 64bit kernel on 32bit Linux Mint with NVIDIA drivers?

I have found several forum posts and SE questions (example) where this seems possible, but my attempt has failed. I've tried the following: sudo dpkg --add-architecture amd64 sudo apt-get update sudo ...
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1answer
386 views

High CPU - NT Kernel & System, Windows 8.1 Pro 64-bit

I have 64-bit Windows 8.1 Pro, Lenovo X220. All updates are installed (both Windows and from Lenovo Solution Center). Every time my computer starts, one of the processes uses 25% of CPU (until ...
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19 views

Of how mutch importance is it to distinguish between subsystem and subsystem/kernel pair

There is no system but GNU and Linux is one of its kernels It is possible to have a kernel with different subsystems and a subsystem running on different kernels. Some real life examples ...
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85 views

how to fix kernel_task process cpu overflow on Macbook Pro 15inch late 2012

I have a Macbook Pro 15 inch Quadcore 2.6GHZ 1TB SSD, 16GB Ram and Nivida GPU. Lately it crawls to a halt so often because the kernel_task process will eat up to 500% of CPU, even when I'm just on ...
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34 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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59 views

USB drive not getting recognized as scsi device in custom linux kernel

I am facing a slow write speed problem with a USB drive in my custom linux kernel. I suspected to be a hardware problem but with the same hardware and Opensuse 12.1 OS, write speed of my USB drive is ...
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0answers
26 views

Why does my computer freeze randomly and also power button not respond? [duplicate]

My computer has this serious problem, I turn on the computer and after a random time lapse, it freeze and also the powerbutton not respond, the only thing that works is the reset button (the one that ...
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21 views

How do I run a patched linux kernel on Arch, using LVM on LUKS

I'm running LVM on LUKS on a Dell XPS 13 (2015 version). I'd like to run the patched linux-xps13-alt kernel which fixes some issues with this system. I have built & installed the linux-xps13-alt ...
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1answer
202 views

Fedora 21 Sound stopped working when installing the 4.0.4 kernel

Today I did a yum update as part of my attempts to get my qemu-kvm vm up and running. It appears to have had a side effect I didn't anticipate. Other than qemu itself, the only other thing that ...
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210 views

Rollback Kernel Ubuntu 14.04.2

I have looked at many answers on here but no matter what it doesn't seem to work. Fresh install of Ubuntu 14.04.2, trying to install an older kernel. I only have SSH access no GUI etc. What i have ...
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34 views

Embed initramfs into existing kernel

Is it possible to embed an initramfs image into existing kernel without recompiling the whole thing? I don't have resources to do that.
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153 views

What extras do I need to maximise battery life on a Linux laptop? (And how to stay current) [closed]

Now, I know that this question has probably been asked 1000 times - but as far as I can tell, the answer seems to change a lot over time. While researching, I came across powertop, pm-utils, tlp, ...
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Alternative of arch_fast_hash in Linux kernel v3.19 and above

To find the hash value of a given buffer, I used arch_fast_hash function present in Linux kernel v3.16 declared in include/linux/hash.h and defined in linux/lib/hash.c. But in Linux kernel v3.19, ...
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1answer
154 views

Who's crashing my kernel?

Symptoms Suddenly, a message saying "A problem in the kernel package has been detected" started appearing after I login upon boot. A new message is shown every second, incessantly (translation ...
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2answers
270 views

Android ADB Shell sendevent Not Working

I want to simulate pressing the power button on a rooted Samsung Galaxy Tab 2 GT-P5100 running Android 4.0.4 using the ADB shell. To do this I changed the relevant permissions using: adb shell su ...
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39 views

how to download and install outdated linux-headers

I just watched the issue concerning how to add additional driver (module) into pre-compiled kernel; I tried to install the linux-headers but in the current repository I could find that all the ...
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107 views

crypto kernel module not avialable on linux 3.18.11 on Raspberry Pi 2

I'm trying to use dm-crypt on my Raspberry Pi 2 with Raspbian (debian) to open a trueCrypt volume, but i get Required kernel crypto interface not available. Ensure you have algif_skcipher kernel ...
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727 views

Mac kernel panic, how to solve this?

I got the following kernel dump my Mac Mini after hibernation. This issue has been a certain event after Mac going into hibernation for a period of time. Then I tried to reinstall Yosemite on my Mac ...
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3answers
135 views

Compiling Linux kernel to boot from a 1.44MB floppy disk [closed]

I want to compile the linux kernel (for use in a floppy linux minimalistic linux distro, which I am trying to make), but how am I going to do this in order to be fitted on a 1,44 floppy disk? I have ...
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0answers
48 views

How to change the Delayed Acknowledgement timer? (14.04)

I am trying to set different values for the timer of the Delayed Acknowledgement and see the different behaviors at packet level. I expected this to be a kernel level option but I can't locate ...
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528 views

OS X Yosemite coreaudiod, identityservicesd and com.apple.geod not responding

Has anyone on here found a comprehensive solution to the problem where coreaudiod is constantly not responding? I also have identityservicesd and com.apple.geod not responding, all the time: every ...
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43 views

How to install perf for my custom build kernel (4.0.0). Updated from 3.2.66

I tried building it from source and installing it. Well, it works fine but gives many warnings. What i could be missing.? I checked if these shared libraries exits and yeah they all exist in ...
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133 views

Kernel Panic when trying to boot Linux Mint 17.1

Ok, I just installed Linux Mint 17.1 (Cinnamon Edition, 32 Bit) alongside Windows 8.1, and when I select linux mint, It goes to the shell boot and the caps lock light flashes, indicating Kernel Panic. ...
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1answer
44 views

Kernel Thread that won't exit, Load Average +1

So I have a new server that is up and running with Centos 6, and the load average is stuck hovering around 1, even when the machine is nearly idle. I reviewed the process table and found this ...
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38 views

Broken boot-splash arch linux

Does anyone know why systems sometimes make broken images on boot? I had same problem when I've upgraded my kernel on Ubuntu. Now this problem appears on my Arch laptop as well (fresh install and ...
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1answer
302 views

How to increase the Kernel memory

I have two Windows Server 2008 R2 machines with the same spec (24G RAM). However, the Kernel memory is quite different: machine 1 has 206M of paged kernel memory and 168M nonpaged. Machine 2 has 998M ...
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0answers
13 views

How can I debug OSX memory card events

I am trying to get kernel messages for memory card insertion - removal, but i don't get logs. I issue the command "tail -f /var/log/kernel.log" So i need to know how to increase kernel log level to ...
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0answers
294 views

Windows 8.1 64bit Kernel-Power 137 Error

I'm at the moment encountering a problem with my windows 8.1 64bit Version. Some days ago I realised that it takes longer than usual to start the computer or wake it up, in fact, the computer seems ...
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1answer
298 views

Broadcom 4360 wireless setup w/ Ubuntu 14.10

I am attempting to set up my wireless adapter, but I can't seem to get the drivers installed properly. OS: Ubuntu 14.10 Motherboard: ASUS X99-Deluxe (wireless adapter is embedded) Adapter: Broadcom ...
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7 views

Recompile kernel to add user process kick confirmation

my apologies if this has already been asked. This is a combination development/admin/security question. My apologies if this question is being asked in the wrong forum. On Windows platforms, even ...
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2answers
40 views

What does it mean when a kernel terminates a process with status 131?

I am trying to debug an issue where a redis-server process died, and in the syslog I see: Mar 9 23:56:44 ip-10-236-158-228 kernel: [25188369.962457] init: redis1-server main process (2822) ...
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42 views

Where to copy kernel source after kernel is compiled from sources?

On my linux box (Mint 17.1) I compiled the kernel from sources so that I could enable certain things that are not there by default. The kernel compiled fine and the system boots/works just fine. ...
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1answer
242 views

Win32 and the global namespace

I'm studying Windows NT architecture. I would like to know what is the relation between the "Win32" namespace and the "\Global??" namespace in the nt namespace? As far as i understand the win32 ...
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127 views

Can't flash openwrt kernel on Mikrotik Routerboard 750

Im trying to flash OpenWRT onto Mikrotik RouterBOARD 750 and Im having some difficulties when trying to flash kernel. Im running OpenWrt form RAM right now. Even though, I erased kernel beforehand, ...
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0answers
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How can I see the currently installed netfilter hooks?

Not just the iptables, is it possible to see the currently installed netfilter hooks in Linux PC? Such as the home-made kernel modules that installs netfilter hooks for someone's own filtering rule?
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70 views

Windows XP Kernal Hack?

I have Windows XP 32-bit and have 8 gigabytes of ram, but aparently windows can only "see" 4 gigs of it. I know that there are 'kernal hacks' for OS's such as Vista, 7 and 8, but none for XP. Could ...