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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Kernelspace - Indepth [on hold]

So, the system memory, RAM is split up in to two sections, kernel and user space. kernelspace is where the operating system's kernel executes and where device drivers execute. It has the highest ...
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44 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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60 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
70 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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13 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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49 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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20 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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37 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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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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17 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
154 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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73 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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25 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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1answer
54 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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8 views

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
92 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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1answer
117 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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30 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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89 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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2answers
360 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
98 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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23 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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372 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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33 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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97 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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32 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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31 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
181 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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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
191 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
230 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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6 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
32 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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39 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
154 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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101 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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8 views

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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1answer
66 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 ...
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30 views

How to set sysfs.conf for EDAC kernel module

I want to set parameter for the following EDAC settings files: /sys/module/edac_core/parameters/edac_mc_panic_on_ue /sys/module/edac_core/parameters/edac_pci_panic_on_pe But before I set any ...
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50 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 ...
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315 views

How to understand and debug USB issues with Linux

I’m having an odd problem with a cheap "reverse USB hub" —not sure what the technical name might be— named a Tek Republic TUS-200 USB Sharing Switch. it has one USB port for devices, and ...
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20 views

cpusets compiled in kernel but not visible when running

Device: radxa ( 4-core ARM ) the official kernel from radxa is used with the ubuntu 14.04 rootfs : https://github.com/radxa/linux-rockchip.git. As cpusets where not enabled in def_config, i enabled ...
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123 views

How to find what is causing a Kernel EventTracing error in the Event Log?

I am troubleshooting a Kernel EventTracing "session failed to start with the following error: 0xc0000011" that pops up too many times in my event log. Every solutions I found in google were very ...
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1answer
57 views

Where is /sys/subsystem as described in Linux kernel doc?

Quote from https://www.kernel.org/doc/Documentation/sysfs-rules.txt: [...] It is planned to merge all three classification directories into one place at /sys/subsystem, following the layout of the ...
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124 views

linux kernel starting issue (file system corrupted) on nand flash memory

please look at here for the trace. To make it short : I need a way to erase flash memory (Root file system) on my arm device to be able to install a linux kernel + file system again. So, let me ...
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43 views

How to limit max RAM usage of a process in kernel 3.13

I am trying to limit the max RAM used by a process in using kernel 3.13.0-43-generic in ubuntu Ubuntu 14.04.1. I would like to set this system wide, but as this doesn't work I have been trying it ...
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Restore [non-boot drive] root directory from kernel image

Accidentally overwrote the root directory on a 2nd drive, .. but the subdirectories are still there [i.e. cd to a subdirectory drive is successful]. Problem is, the root directory in the partition is ...
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53 views

Console outputs kernel error AudioSysctl

Since Yosemite my console app logs this twice a second: kernel: AudioSysctl: (0) It's insane. Since I can't find anything about it in the internet, how would I try to get to the bottom of this (and ...
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29 views

ethernet port is not detected in freescale MPC8569 board after kernel updrade

I have a freescale MPC8569 embedded board. previously, I put linux version 2.6.32 on it and all interface connected to processor are working properly. Now, I upgraded my linux version to 3.10 and now ...
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1answer
111 views

What is *Paged* Kernel Memory?

What is paged kernel memory, as reported in the Windows Task Manager? Is it related to the page file? I assumed that it was the part of kernel memory stored on disk in a page file, but I tested ...