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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How to check Intel iGPU frequency on Linux?

I own Intel Haswell G3420. At stock its iGPU has 1,15 GHz turbo frequency. In my UEFI I overclocked the iGPU to 1,5 GHz and added voltage. However the framerates in both benchmarks and games are the ...
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1answer
1k views

why does my Mac keep crashing?

(I will have to do this fast, since I think my mac will crash again.) My Mac keeps crashing. It started happening since I installed Adobe Acrobat Pro (since then I have removed it), but it might be ...
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1answer
167 views

Linux Kernel Driver for video capture

I have this EasyCap video capture thing with a USBTV007 chip and I really would like to get it working on my little linux mint 17 laptop so that I can capture video for my RC stuff. But I do not know ...
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2answers
131 views

How to install usbnet driver on kernel 2.4.23-2.5-ts/

I searched in the directory "/usr/lib/modules/2.4.23-2.5-ts/kernel/drivers/net/usb/" for the usbnet but i didn't find it so how can i install the usbnet driver,i don't know where to start or how to ...
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34 views

Fedora: Get a list of installed kernels by Date

I want to get a list of installed kernels in decreasing order on the date which they were installed. Any idea on how to do this? I am on Fedora 20
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65 views

make-kpkg: how to get the correct links in /lib/modules/$version/{source,build}

I'm using make-kpkg to build custom kernel packages (linux-image-.deb and linux-headers-.deb) that I then deploy to my other Linux rigs. The linux-image package created that way creates source and ...
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1answer
57 views

why does NOT the ubuntu 13.10 have the version.h?

/usr/src/linux-header-3.11.0.12 /usr/src/linux-header-3.11.0.12-generic Neither has the version.h file in the /include/linux/. Why? That hinders the softwares installation.
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109 views

Updating kernel on a Chromebook to prep for Chrubuntu

Pretty simple question: I have read that by setting my Chromebook to the dev channel, it will install a later kernel. Currently it's 3.4.0, and it'd install 3.8.0 (64-bit, no less). However, after ...
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1answer
806 views

Updating Chrubuntu 14.04 kernel on Acer C7 (currently 3.4.0)

There was another, similar question on this here, but it's for old ubuntu versions, and the script no longer works. While installing, the script works fine until: + vbutil_kernel --verify /dev/sda6 ...
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82 views

Testing Linux Kernel in QEMU gives black screen after brief text

I'm trying to run a linux kernel (version 3.14) I custom built using make menuconfig. I am trying to test it in QEMU and this is the command I am trying to run: qemu-system-x86_64 -kernel ...
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2answers
69 views

Why I can't upgrade my kernel?

I have perform the following command into ssh shell: sudo apt-get upgrade sudo apt-get update sudo reboot But I still have an old kernel version, infact: pi@raspberrypi ~ $ uname -a Linux ...
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1answer
437 views

how to install 'version.h' in ubuntu ?

Just now , I try to install the Jungo WinDriver in the Ubuntu 13.10 . But I am puzzled by the its manual of how to Install version.h : Install version.h: The file version.h is created when you ...
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0answers
149 views

No COM1 port on hyper-v

I just made a fresh Windows 8.1 install and am trying to set-up a VM for kernel debugging. Therefore, I need to create a serial link to debug the VM using windbg. Usually I just simply add a new COM ...
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1answer
55 views

How to specify this 'symbolic link' for the Jungo WinDriver?

Just now , I try to install the Jungo WinDriver in the Ubuntu 13.10 . But I am puzzled by the its manual : 4.2.3. Linux WinDriver Installation Instructions 4.2.3.1. Preparing the System for ...
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0answers
19 views

PCI configuration method error (Linux Kernel)

(I'm not sure if here is the best place for that question, so I will be pleased if anyone suggests me a more proper forum for that.) I'm trying to install Ubuntu 12.04.4 in a netbook (from an usb), ...
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1answer
115 views

How to add iptable support to the kernel (for Wheezy/Sid release)

I am running an ARM processor (similar to the raspberry pi) and my kernel doesnt natively support iptables. If I run apt-get install iptables, it successfully installs but NAT tables are unable to be ...
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0answers
2k views

Perf samples too long, lowering kernel.perf_event_max_sample rate to

My machine freezes from time to time and I can get it working back by pressing the space key. I have this problem since two weeks now, but it was just once per day max. Now it's starting to be many ...
2
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1answer
60 views

Kernel panics on numerous identical systems running the same OS image

I am trying to diagnose an interesting problem that affects perhaps a dozen or more identical computers. We have an increased rate of kernel panic errors lately, yet I cannot figure out how to ...
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0answers
320 views

kernel panic: VFS: Unable to mount root fs on 03:02

I'm studying kernel compilation for my operating systems course. Unfortunately I'm compiling Linux v2.4.20 and Red Hat 9(yes, they're making us use it and it drives me crazy but I've NO CHOICE ...
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1answer
38 views

Windows HAL dll cannot be used anymore

I ve got this weird problem. For a long time I was running xp sp3 with /hal=halmacpi.dll switch in boot options. Everything fine. I just booted to the "old" normal mode, without the switch. (I used ...
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1answer
3k views

Errors mei_me 0000:00:03.0: timer: connect/disconnect timeout. after upgrade to 14.04

I upgraded from ubuntu 12.10 to 14.04 and now I get dmesg|grep mei [ 19.246502] mei_me 0000:00:03.0: irq 48 for MSI/MSI-X [ 24.280045] mei_me 0000:00:03.0: timer: connect/disconnect timeout. ...
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0answers
19 views

what do i do after editing a *.c file in the linux kernel

I have been having sound issues with the VT1802 AKA VT2002 I have copied over a possible fix into the file patch_via.c in dir /var/lib/dkms/oem-audio-hda-daily/0.201405052014~ubuntu13.10.1/build/ ...
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0answers
193 views

Windows equivalent of alt + sysrq + REISUB/REISUO

Is there a (kernel-level) Windows equivalent to the Linux Magic SysRq key combination REISUO/REISUB? i.e. Redirect keyboard to console Send a quit signal (non-forceful kill) Send a SIGKILL ...
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143 views

Mount Error (mount: page allocation failure. order:5, mode:0x40d0)

I am trying to mount mtd block on temporary file system(part of RAM). Some times mount command fails and below error comes in dmesg logs. Command: mount -t jffs2 /dev/mtdblock7 /temp/configuration/ ...
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21 views

How to tell which devices have been denied in a device cgroup?

In Linux Control Groups (cgroup), one can use the device subsystem to allow or deny access to device files. By default, all devices are allowed in the top-level cgroup. If I deny a certain device, by ...
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1answer
22 views

Gentoo virtualbox X support

So i wanted to play around in gentoo to level up my linux knowledge. I've installed it on virtualbox, but i didn't add a few USE flags, and during core compilation i didn't select a few necessary ...
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11 views

Output of usbmon ( length field )?

In http://www.mjmwired.net/kernel/Documentation/usb/usbmon.txt#163 it is written that before status tag ,there is data length field ,in my output for usbmon http://pastebin.com/b6U7Je7h please ...
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2answers
513 views

How to use usbmon for knowing amount of data transferred from usb (pendrive )?

Please someone explain me in simple terms how to use usbmon to track the amount of data transferred from pendrive ?
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0answers
127 views

Debugging linux kernel, SIGKILL

Trying to debug linux kernel (vmlinux) with gdb during my education, but after I run kernel I just got "program terminated with SIGKILL": gdb vmlinux-3.11.0-12-generic ...GDB header... Reading ...
2
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1answer
716 views

Why is the System process using 40-60% of CPU power all the time?

TL;DR: ACPI.sys is constantly using lots of CPU power. Virus and malware scans all come back clean Drivers are up to date (GPU, Chipset, USB devices) Possibly important info: This install of ...
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1answer
65 views

How to add code into the linux kernel?

I am studying how to analyse and evaluate the TCP/IP protocol stack of Linux. My goal is to study the performance of the tcp/ip protocol stack as a whole, to study the time cost of each layer and ...
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0answers
293 views

Downgrade fedora 20 kernel

I want to downgrade fedora's 20 kernel (3.11) to version 2.6 because I have a package that only supports that kernel. I have looked everywhere for 2.6 kernel for fedora 20, but with no luck. If I try ...
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1answer
66 views

Custom kernel 2.6.18 compile in centos ends on fail

I'm compiling from RPM source. The same compile worked in the past but not this time. May be you can help me to solve this issue? make[2]: Leaving directory ...
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1answer
128 views

Remove i486 kernel (retain i686 kernel) after install

I'm repurposing an older 32-bit machine. After a Debian install, I have the following GRUb entries: Linux 3.2.0-4-486 Linux 3.2.0-4-686 I don't need the i486 kernel. I have been deleting the i486 ...
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32 views

Debugging not-loading Windows XP x64

The question is related to this one: Windows XP x64 hangs at welcome screen. So I want to debug WinLogon.exe through Windows Kernel-Debugger remotely using an 1394 (Fire Wire) port on the system asked ...
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169 views

Copy from Debian to mounted CIFS share hangs

I have a backup script run by a cron job on my Debian server. It creates a .tar.gz file from /home and copies it to a mounted CIFS share onto a Windows XP machine. It has been running without a ...
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114 views

Linux Mint won't poweroff, only reboots

I have a very strange problem with my Linux Mint. I'm using it on a lap HP455 and actually everything works fine except that when I have try to shut it down Linux will only reboot indefenitely. I've ...
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101 views

Apply binary patch to linux kernel image

I have a kernel image. The sources are somewhat lost and I dont want to migrate to a recent version (embeded software, custom (patched) linux kernel 2.4.24). I want to make a simple operation: ...
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1answer
32 views

Need To uncompress the initramfs file

I am new to this Linux Kernel and I am trying to boot a board from the usb and I was sucessfull Now My problem is the usb has two files a) initramfs.cpio.xz b) linux.img Now what I need to do ...
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175 views

Syslogd: hardware error

The machine has been sending these messages to the terminal, paired with beeps from the speaker on the motherboard. These messages appear every 5 minutes, sometimes naming CPU2, sometimes CPU3. ...
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1answer
742 views

Not enough host controller resources for new device state

I have a debian mint based system where I plug in 16 usb devices. The Kernal is: 3.11.0-12-generic After about 10 or so devices I start to experience problems with connecting new ones. There error ...
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0answers
86 views

OS X MCP_ELPG_VCORE_STS_SATA_POWERED_UP never reached! error

I'm using a macbook air and it keeps shutting itself down in the middle of usage and brings the following error Anonymous UUID: 3B35044A-64F2-3EA5-3C7B-5C908E62F2F6 Mon Mar 17 23:52:31 2014 ...
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4answers
4k views

Killing wininit.exe shuts down Windows

When I kill wininit.exe, Windows 7 suddenly shuts down. Can someone explain this using Windows mechanics? I feel like this might because the process provides something important, or this might be a ...
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1answer
63 views

How to git clone specific linux kernel build

I know I can git clone the linux kernel using the following: git clone \ git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git \ linux-2.6 But I'm wondering how to clone a specific ...
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1answer
204 views

In sysctl.conf settings, what is the difference between 'all' & 'default'?

In context of sysctl.conf settings, what is the difference between (all vs. default) like net.ipv4.conf.all.accept_source_route & net.ipv4.conf.default.accept_source_route in sysctl settings ? ...
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33 views

Linux: Keypresses missed when typed, possibly IRQ issues?

I have a strange behavior on a Raspberry Pi, running a buildroot'ed Linux kernel 3.13.5. When the system comes under a little load (eg. mpd is running in the background happily playing out some ...
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1answer
32 views

How to setup mainline kernel

I need to set up mainline kernel on my ubuntu machine. I went to the kernel.org and downloaded the the zip file and unzipped it. Now, I have the copy on my local machine. But how to keep it updated, ...
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2answers
156 views

What does the below sentence mean? [closed]

Windows CE is a distinct operating system and kernel, rather than a trimmed-down version of desktop Windows. — Wikipedia's Windows CE entry. The cited source for that sentence in Wikipedia is a ...
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67 views

My windows 7 keeps randomly freezing when I'm doing a variety of activitiess

The screen stays the same but goes unresponsive, and I get a loud ringing robotic sound through my headset. Log Name: System Source: Microsoft-Windows-Kernel-Power Date: ...
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1answer
48 views

How is system call executed [closed]

From the point of view of application programmer the system call is just invocation of a procedure from wrapper library. As I don't have good knowledge of assembly I was wondering how it is done on ...