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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Stuck on GRUB command prompt after regular kernel update

I am running Debian Wheezy. Update Manager suggest to install kernel update. After update, I reboot system but instead of listing all the kernels (bootloader), it gave me a GRUB command prompt: ...
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3k 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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0answers
94 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 ...
2
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0answers
141 views

Kernel Panic from overheating?

I believe my CPU is overheating which is causing a kernel panic and the machine reboots. It is an Intel 3612QE. I have changed the cpufrequtils scaling_governor to ondemand, conservative, and also ...
2
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0answers
259 views

How to stop jbd2 to release a device

In an AWS EC2 instance, we have multiple EBS volumes. When I try to detach any of them, the umount command works, but the device can't be detached. # grep -c xvdj /proc/mounts 0 However, lsof ...
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0answers
74 views

Making hardware profiles for Linux installation

So, I've got a ArchLinux installation on /dev/sda11, and I've imported it into VirtualBox using raw host partitions. Right now, I can boot it both directly and through VirtualBox. The problem is the ...
2
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0answers
924 views

Ubuntu Natty: 32-bit userland, 64-bit kernel?

I'm trying to manually install a 64-bit kernel for 32-bit Ubuntu. I have my reasons for doing so, but they're too complicated to explain here. Prior to Natty, this worked fine. Now, on Natty, I get ...
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0answers
803 views

How to change hdd read error timeout?

I'm recovering data from an hdd using ddrescue. With "retry" disabled, it takes roughly 30 seconds for every unreadable sector. The hdd has tens of thousands of bad sectors and the process is taking ...
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0answers
38 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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0answers
17 views

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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0answers
20 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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37 views

Is BIOS/UEFI used after OS startup?

I know that BIOS/UEFI is used during computer startup to boot the system and check HW and that it provides abstraction over hardware Does this mean, that the OS kernel calls BIOS/UEFI layer when the ...
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0answers
72 views

Computer froze with black screen when viewing (not editing) video card's memory in Cheat Engine

I was looking at my computer's physical memory in Cheat Engine (a memory editor/debugger application) and I decided to look at the addresses that Device Manager says are used by my video card. When I ...
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0answers
40 views

Y-E DATA FlashBuster-U is not working with Ubuntu kernel

I'm using the latest Ubuntu kernel. And I can't use it at all I just get these buffer IO errors - usb 3-3: new full-speed USB device number 3 using ohci-pci usb 3-3: New USB device found, ...
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0answers
130 views

How to keep Linux kernel responsive while having high memory usage?

Sometimes I have a lot of programs running and despite of 16GB 8GB of memory my ubuntu linux 14.04 LTS turns out to be not responsive at all. I won't be able to get a TTY to kill some processes to ...
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0answers
21 views

linux-headers and images in ubuntu after installing vmware-tools

a noob question. Can I run dist-upgrade for linux-headers and images in ubuntu after installing vmware-tools? I ask this because i think vmware-tools also install something like a header and image ...
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0answers
132 views

Thinkpad Yoga “Disk I/O Error” (Linux)

My machine is sporadically remounting the SDD readonly due to a "Disk I/O Error". This seems only to happen when I connect to the laptop to a power source or after resuming from suspend. The SSD ...
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0answers
20 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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187 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 ...
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0answers
38 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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0answers
294 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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0answers
300 views

how to resolve kernel_security_check_failure

I am trying to re-install my Nokia-E5 software by Nokia suite ,I have windows-8.1 OS on my laptop , I am getting this error kernel_security_check_failure . And my laptop restarts. I have no idea how ...
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1k views

What does this mean: considerRebuildOfPrelinkedKernel prebuild rebuild has expired

A line I accidentally spotted in system.log on MacOS X 10.9.1 when I connected an external USB webcam for the first time ever.... Subsequent connects to the usb port did not produce this message ...
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0answers
7 views

How to approach searching for sources of interface unresponsiveness

On Debian Linux: On a relatively powerful machine I ran an update and both the kernel and the window manager got updated to newer version. At that point the machine become noticeably less responsive: ...
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0answers
94 views

linux + squashfs-tools for red-hat 5.3

I want to install the squashfs-tools-4.0-5.el6.i686.rpm But I have the following dependencies ( after RPM installation ) please advice what the additional packages that I need to install on my linux ...
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0answers
136 views

Linux kernel 3.9 new storage features howto?

Linux kernel 3.9 has been released, which brings new features for storage cache devices (dm-cache), as well as BTRFS RAID 5/6. These features are undoubtedly sexy, but are all but completely ...
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114 views

-kernel option like in QEMU for BOCHS

I am working on creating my own kernel using C/Asm. I have always used QEMU as my emulator mainly because I can specify -kernel and it boots the kernel directly without a boot loader. I wish to switch ...
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0answers
427 views

How to find whether setcap is supported in Linux

I have a libpcap based application. Now, to allow non-root users to use my app, during installation , i use setcap setcap cap_net_raw=ep /bin/myapp But, in case the Linux Distro on which i install ...
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0answers
346 views

USB Mass storage driver as CDROM in Windows & MAC

I am in the process of enumerating a Hybrid ISO image which will show up as CDROM in Windows & MAC and encountered with the following problem. Hybrid ISO image is created with the following ...
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0answers
117 views

Ubuntu alternate install CD kernel modules

I'm using Ubuntu alternate install CD to customize the installation process. I have a hardware that uses Realtak 8188CE chipset for wireless network. If I boot into a LiveCD environment I can connect ...
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0answers
131 views

How to make ^T work for the status char under Linux?

I’ve grown really accustomed to the BSD status char, ^T, since I first started using it back at university during the 80s. It didn’t originate with BSD, but came from even older operating systems. It ...
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0answers
238 views

Syslogd kernel:code:

While running some experimental Java code which interacts with a MySQL server, I received these messages and then the server crashed: Message from syslogd@localhost at Jun 20 20:04:12 ... ...
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359 views

ARM Linux kernel debugging on AT91SAM9261

I have ported Linux to AT91SAM9261 board, I have compiled my own Bootstrap, Uboot, Kernel and filesystem. Now I want to debug my Linux kernel 2.6.30 using KGDB and GDB. I have host with Ubuntu ...
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0answers
2k views

Packet drop measured by ethtool, tcpdump and ifconfig

I have a question regarding packet drops. I am running a test to determine when packet drops occur. I'm using a Spirent TestCenter through a switch (necessary to aggregate Ethernet traffic from 5 ...
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0answers
26 views

Ubuntu Vivid, Missing vmlinuz from /boot

This might be an Ubuntu Vivid specific question as I haven't meet it before. In my new Ubuntu Vivid, the VmLinuz Boot Image /boot/vmlinuz* is not found and I can't generate it. Answer from ...
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0answers
8 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 ...
0
votes
0answers
8 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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0answers
69 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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0answers
19 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 ...
0
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0answers
34 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. ...
0
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0answers
21 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 ...
0
votes
0answers
9 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
5 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 ...
0
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0answers
34 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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0answers
66 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
7 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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0answers
14 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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0answers
141 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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0answers
16 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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0answers
79 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 ...