This tag is for questions about the internals of the Linux kernel itself - particularly about use or configuration of kernel modules or drivers.

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0
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1answer
705 views

USB Mouse / Keyboard issues with Linux

First and foremost, this problem only occurs when I compile one of the more recent Linux kernels (3.2.6 or 3.2.7). I do not have these issues when running the stock kernel 3.2.6 or 3.2.7 kernels under ...
0
votes
1answer
146 views

linux chmod causing crash

I needed to give write permission to file representing GPIO pins,out of curiosity i taught changing permissions of all files/folders,by mistake instead of doing chmod 755 * in the root I did chmod ...
1
vote
1answer
2k views

“64-bit mode not compiled in” error while compiling Linux kernel

I am building 2.6.18 from CentOS source code. I'm at the last step to the build process in their instructions but seem to be getting an error that I can't understand. Instructions I'm following: ...
0
votes
2answers
3k views

How to show overall usage of system resources in linux?

Is there any way that i can see all system resources usage together in terminal, as we see on windows platform under Resource Monitor. I can see each resource usage under Linux separately, but i need ...
1
vote
0answers
877 views

Use initrd as root filesystem for network boot

I'm creating a stand-alone set of netboot images based on a LinuxFromScratch installation (7.0, kernel 3.1.0). I want to deploy that image to many diskless clients, but NFS is in my situation not an ...
2
votes
1answer
650 views

ZFS distribution in Linux kernel? [closed]

If anyone has a better title for this question feel free to edit I am wondering about something related to the conflict between CDDL (Sun's license) and the GPL. Mainly pertaining to the reason ZFS ...
2
votes
2answers
325 views

What does this macro mean in linux kernel code?

see i found one config file in which this are macro defined # # Input Device Drivers # CONFIG_INPUT_KEYBOARD=y # CONFIG_KEYBOARD_ADP5588 is not set CONFIG_KEYBOARD_ATKBD=y # CONFIG_KEYBOARD_QT2160 ...
6
votes
2answers
11k views

Linux kernel hangs at 'Switching to clocksource tsc" on Pentium 4

Hardware: Dell Dimension 4500S : i845G, Pentium 4, stock + 2GB RAM and latest (circa 2002) BIOS update. I've been building a Linux system from source, so far it's LFS 7.0 by the book. The first ...
0
votes
1answer
909 views

VirtualBox Under CentOS vboxdrv not loaded

I am a newcomer with linux. I have a little problem with linux. Whenever I try to open [start] virtual box, I get this error and do not know how to fix VERR_VM_DRIVER_NOT_INSTALLED (rc=-1908) The ...
-2
votes
1answer
406 views

Open a linux port without using iptables in Centos? [closed]

just a quick question, is it possible to open a port on linux Centos without using iptables? If so, how do I do that from the command line?
1
vote
1answer
1k views

Kernel log littered with re-mount attempts because of going to/from battery mode. How do i turn it off?

My boot times became a bit too much so i decided to take a look ad kernel log to see what might be causing the problem.. There i noticed repeating: 12/17/11 02:25:28 PM EXT4-fs (sda6) ...
0
votes
1answer
176 views

Installed linux-image-686-pae and now my second monitor won't work

I just installed linux-image-686-pae on my Debian system and the PAE kernel effectively increased the memory limit. However for some reason my dual monitors both show the same image, instead of an ...
2
votes
1answer
102 views

can /usr/src be a sym link?

I want to store all source code of programs I have installed in /usr/src. However, due to size of the drive I made a sym link /usr/src that points to ~/src. That was nice. Unfortunately, that caused ...
1
vote
2answers
4k views

__modver_version_show undefined error when building linux kernel 3.0.4 version

I tried to build the linux kernel 3.0.4 on ubuntu 11.10 in virtualbox. Here are my steps: Download the source code tar xjvf linux-source-3.0.0.tar.bz2 cd linux-source-3.0.0 make menuconfig, changed ...
0
votes
1answer
3k views

Where to get the network NIC's firmware rtl_nic/rtl8105e-1.fw?

Im installing Debian testing version wheezy on my Asus X53Sc with Intel Centrino Wireless-N 100. Im having a problem with my wifi connection. When I try to connect to internet with the wireless ...
1
vote
1answer
194 views

Missing kernel on debian-testing-amd64-DVD-1

I want to install the Debian testing linux version. But at a certain point of the installation, an error occurs: Impossible to install kernel. a compatible kernel version is missing. … or ...
2
votes
1answer
115 views

Oracle Virtualbox on statically compiled kernel

I can't seem to find any documentation on the subject. I'm working on putting together a linux install for a fairly "dirty" environment. Best practice there would be a statically compiled kernel ...
1
vote
1answer
289 views

Sudden machine reboots observed with ipmiutil watchdog timer

Originally raised on serverfault as this question. I've got a production openSUSE 11.1 2.6.34.4 Intel server with a standard ipmiutil-2.4.1 installed. The watchdog is basically a 90 second hardware ...
0
votes
1answer
861 views

L3 cache disabled in Ubuntu 11.04

I have installed Ubuntu 11.04 64bit .. After checking my CPU cache it shows that 3MB cache is disabled. see below : $ sudo lshw description: Notebook product: SATELLITE C660 (PSC1SE-00G009AR) ...
0
votes
3answers
2k views

Can I install Linux on a USB flash drive?

I want to install Red Hat Linux on my flash drive. Is there a way that I can do this? I tried a lot found through searching, but couldn't get a satisfactory answer. In fact, if I try the same for ...
0
votes
0answers
388 views

Debian Squeeze, linux-image-2.6.32-5-486: Boot process halts with [<c1003997>] ? kernel_thread_helper+0x7/0x10

I just upgraded an old box from Debian Etch to Lenny, and then from Lenny to Squeeze. Upon getting the system up to Squeeze, I installed the latest 2.6 kernel, linux-image-2.6.32-5-486. When I ...
0
votes
1answer
1k views

How to add ahci module to linux-image-2.6.38-11-virtual kernel?

I just installed Ubuntu 11.04 with the linux-image-2.6.38-11-virtual kernel as a virtual machine in VirtualBox (4.1.2). When I booted the machine after installation, I got this error message: FATAL: ...
3
votes
3answers
2k views

Unmounting Detachable devices (eSATA,USB storage) in Linux

A detachable device like eSATA, USB drive can be abruptly removed (by simply pulling the plug). If there are open file handles on a partition, then this partitions won't unmount, i.e. the Linux ...
0
votes
1answer
129 views

user not able to access the file which has privilege via group

I am facing the below problem in linux kernel 2.6.18-7.1 I created user "BBC" using adduser -D after this /etc/passwd contains "BBC:x:1010:1010:Linux User,,,:/home/BBC:/bin/sh" I created group ...
3
votes
1answer
162 views

Should I compile the linux kernel in the git repository itself?

This is about common practices. I have a git repository containing the linux kernel. Now I want to build this linux kernel. Should I copy the sources outside the git repository and then build the ...
2
votes
2answers
6k views

How do I set up grub2 with Xen?

I am booting a new Xen kernel and it all goes fine up until some point during the boot process when the machine reboots without warning. Unfortunately, I don't see errors flash up just before that ...
1
vote
1answer
195 views

Building the Linux kernel: compute intensive or disk I/O intensive?

I am trying to explain some results that I got from a recent benchmarking experiment. For that I need to know whether compiling the Linux kernel is a compute intensive task or a disk I/O intensive ...
0
votes
1answer
349 views

Linux kernel compilation taking over 4 GB of temporary disk space

I am trying to compile linux kernel 2.6 and am shocked to see it is taking over 4 Gigs of disk space. It is also taking around 80 minutes to compile. Is it normal ? Or am I doing something wrong ? ...
0
votes
3answers
2k views

How does route -n work in Linux?

I can understand the output of strace route -n, but does route really read any of the files in /proc to get the routing table? Also, if the routes and IP addresses are stored under /proc, why doesn't ...
0
votes
1answer
1k views

Kernel panic when trying to setup rootfs over NFS on ARM board

I have a ARM board on which I am trying to configure NFS so that the rootfs will be mounted over a network. How can I resolve this? My server configuration: OS: Scientific Linux 6.0 My NFS shares: ...
6
votes
2answers
8k views

how to totally clear the filesytem's cache on linux?

In a performance test, I want to bypass the influence of cache of linux system (including page cache/inode cache and so on). I have tried O_DIRECT flag, but it's turned out that direct I/O is still ...
1
vote
1answer
885 views

Setting /proc/sys/vm/overcommit_memory to 1 and then exhausting addresses

As I understand it, setting /proc/sys/vm/overcommit_memory to 1 is supposed to make sure malloc always succeeds, and set the OOM killer loose if there's an actual memory problem. I'm wondering what ...
0
votes
0answers
69 views

Unified file system across Windows and Linux for type-2 hypervisor

Is there anyway to map a Windows disk partition( c:/, d:/) to Linux (running as guest on top of Windows host Type-2 hypervisor)? There are few solution like a shared folder in VirtualBox, however, ...
0
votes
1answer
439 views

Ubuntu is running in low-graphics mode

This error appears during Ubuntu 10.04 start up and I can run in low graphics mode. I tried to install the NVIDIA driver and then it works but when I reboot Ubuntu this error appears: (EE) NVIDIA(0): ...
0
votes
1answer
409 views

What's new in Linux 3.0? [closed]

Linus Torvalds just announced that he's releasing version 3.0-rc7. So what's new in Linux 3.0 when it comes to: Architecture Stability Security Hardware support etc
2
votes
1answer
555 views

Out of space while bulding Linux kernel

I am trying to build Linux kernel. I am getting out of space after a while. I unpacked it in /usr/src directory. It seems I have plenty of space. Can you please let me know what can be done about it. ...
6
votes
5answers
10k views

What does “sudo -s” actually do?

I am using ubuntu 10.04. I notice that after I run "sudo -s" in terminal, the prompt changed from "XXX@XXX" to "root@XXX", seems it changed to root privilege. But when I check the ...
0
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2answers
1k views

How to run linux 0.01? [duplicate]

Possible Duplicate: Running linux kernel 0.01 in a virtual machine How can I run Linux 0.01 on my laptop? If it's possible to run it, could you tell me how? Here you can download the ...
0
votes
3answers
907 views

PATH is not permanently stored in file

I'm a newbie to Ubuntu. I want to add some variables to my PATH - I am using the following steps: Open a terminal window. Type the following commands: export GOROOT=/home/linux/go/hg export ...
9
votes
6answers
17k views

How do I uncompress vmlinuz to vmlinux?

I have already tried uncompress, gzip, and all other solutions that come up as google results and these have not worked for me. To get just the image search for the GZ signature - 1f 8b 08 00. ...
1
vote
0answers
789 views

Setting up a Remote Diskless System

I am trying to setup a PXE Boot server with RHEL 6 and am following these directions. Has anyone done this successfully?? I am having various issues. I used the rsync command to copy over the ...
2
votes
3answers
900 views

Running linux kernel 0.01 in a virtual machine

I'm just trying to know if is there is a way to run the first version of linux in a virtual machine. Since I am very new to this, my aim is to learn something basic on how the first version of linux ...
1
vote
1answer
339 views

Linux - Whitelist hardware devices

For security purposes, is it possible to have the operating system enforce a whitelist of hardware devices? This means that plugged in devices that are not in the whitelist will be ignored at an as ...
4
votes
2answers
432 views

Is it possible to boot a consumer i7 system with a Xeon processor and ECC memory?

I have read a couple of blog posts on the Internet that appear to imply one can boot at least some i7 motherboards with unbuffered ECC memory and a Xeon 43xx processor installed. I can boot my MSI ...
0
votes
1answer
662 views

Linux I2C Communication from Kernel Space

How do you interface with the Linux I2C driver from kernel space? For example, if I had LEDs connected to a GPIO expander on the I2C bus, how would I blink them twice before going down for reset from ...
2
votes
0answers
226 views

Linux kernel 2.6 - layer 7 support?

From what I found on the Internet, Layer7 classifier support is not merged into the current kernel (as of 2.6.39-rc6) and can be achieved with a patch. Is it known when (if ever) the support will be ...
0
votes
1answer
246 views

Exec Shield patch

The Exec Shield patch was removed from the Debian repositories a few months ago. Where can I download the patch ? I found this link but files are from 2006: Ingo Molnar link
0
votes
3answers
301 views

can't use console in Linux

I have some problem with Linux, I switch graphic interface to the console using Ctrl + Alt + Shift + F1, but I can't type anything, every second I receive: my question is, why can't I type ...
4
votes
1answer
3k views

`cat /proc/kmsg` outputs broken text

cat /proc/kmsg is convenient way to follow kernel messages. But the output is unreliable. Example: < eoyfl-o-ilF ilaltssI hwflssesJ a hwbctaealatv-psL hwmmr-sg()nc-l-TtssN oeOfso-eitr()so-l-iesQ ...
4
votes
3answers
499 views

Pipe kernel messages to another process as they occur

I have an OLED screen on my laptop that I have configured to show status information. The current driver I have installed in Linux for it is able to display messages by sending them to a script as an ...