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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How can I change a ChrUbuntu 12.04 install over to Arch ARM on a first generation Samsung Chromebook XE500C21?

I installed ChrUbuntu 12.04 on my Chromebook (Samsung XE500C21) using this script. Is there a way to swap my distro over to Arch ARM? Failing that, is there an easy way to install Arch ARM on the ...
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5answers
26k views

Where can I find linux-kernel-headers-x.x.x.x for SUSE?

I'm installing VMware Workstation on a SLED 11 SP1, and the installation is blocked by an error message "Kernel headers for version 2.6.32.27-0.2-default were not found". If you installed them in a ...
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1answer
3k views

What do these error messages mean and how to fix it?

============================================================== actually I figured out this is an issue of intel video driver:http://lkml.indiana.edu/hypermail/linux/kernel/0902.3/01703.html ...
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1answer
31 views

Does the guest OS need updates/changes after changing the number of cores in VMware Player?

I installed ubuntu on a vm in VMware Player and forgot to change the number of cores from 1 to 8. If I change that now will the linux kernel need to be recompiled or anything like that or will it just ...
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0answers
15 views

UBI ERROR: Attach Error

I get this UBI error while I try to attach mtd device. [root@npa-be ~]# ubiattach -d 0 -m 3 UBI: attaching mtd3 to ubi0 UBI: physical eraseblock size: 1048576 bytes (1024 KiB) UBI: logical ...
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0answers
36 views

Using a gif for linux kernel boot up

I want to use either a gif or multiple looped images instead of the default linux boot up image. I know it is possible to replace the default image with another image, but is it possible to use a gif ...
0
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0answers
31 views

How to say the kernel to prefer self built kernel module from extra folder?

I am on Debian 8 with 3.16.0-4-amd64 kernel. It delivers already a driver for some hardware and I want to replace it with my self built module. The files are correctly installed in the extra folder: ...
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0answers
11 views

Is system call the only way that a user program can intentionally affect the state of a Linux kernel?

I think there are several ways that a user program can intentionally affect the state of a Linux kernel. By invoking a system call; By invoking mmap() and writing the memory that has been mapped to ...
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1answer
995 views

How can I get the number of threads running in a process from /proc/[pid]/stat in Linux?

I have the pid of the process. I would like to know the current number of thread running in the process. I know I can read /proc/pid/stat for this information, but I'm not sure how to specifically get ...
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2answers
38 views

How can I get socket information, from outside of a Linux process, on its socket?

I'm specifically interested in listening TCP sockets, but getting all and any socket (struct sock, as defined in Kernel's include/net/sock.h) information for a socket would be nice. For example, this ...
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1answer
22 views

How to compile the linux without any audio codecs?

I want "no audio" functionality in an embedded system. So, any idea about how to configure kernel without any audio? Thanks.
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0answers
43 views

Cannot start LXC container: failed creating cgroups

I am using LXC (Linux Container) 1.0.6 on a Ubuntu 14.04 64bit Virtual Machine trying to build HTTP service in a container. I have trouble starting the container: $ sudo lxc-start -n test1 lxc-start: ...
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3answers
526 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 ...
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0answers
8 views

update-grub creates a menu entry with read only option

I am trying to automate the installation of a new linux kernel across a data center. After the installation, my script runs update-grub to add an entry to the grub menu. It updates ...
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1answer
37 views

Where can I find the origin of specific modprobe conf option to erase it?

When I do modprobe -c |less The configuration files contains: options nouveau modeset=1 options bbswitch load_state=0 unload_state=1 options b43 nohwcrypt=1 qos=0 options rd md=0 options rd dm=0 ...
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0answers
31 views

BATMAN protocol

I am having problems with Batctl. I installed Batman adv and batctl on ubuntu 14.04.1. I am having problems with batctl commands. When I write comand "Batctl p 00:16:bf:01:68:46" i get this error: ...
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1answer
34 views

What could cause out_of_memory & __alloc_pages

Sadly my server is permanently hangging due to out of memory: Nov 8 07:30:43 crawler kernel: Nov 8 07:30:43 crawler kernel: Call Trace: Nov 8 07:30:43 crawler kernel: [<ffffffff800cb625>] ...
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1answer
31 views

Linux NTFS-3G General Protection Fault when using OS X in VirtualBox

I have an OS X virtual machine in VirtualBox on a Debian host. The disk image is located on an NTFS partition (which is not the system's root partition), mounted using NTFS-3G. The machine was ...
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0answers
17 views

Keyboard and mouse don't work after kexec

While installing Fedora on my MacBook Pro Mid 2012 I've occasionally used kexec command to "boot" from live environment to the installed system. # yum install kexec-tools.x86_64 # mount LABEL=/boot ...
0
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1answer
38 views

Patch files for Linux Kernel 2.6

I am doing some data analysis on the code base of Linux kernel version 2.6. However I noticed that in the kernel website (https://www.kernel.org/pub/linux/kernel/v2.6/) patch files are missing after ...
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0answers
35 views

Gentoo Linux: Building a kernel that only only contains drivers for the hardware in place

I would like to build a kernel for my system that only contains modules for the hardware which is really in place. Of course I can walk through lspci and manually select all the necessary device ...
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2answers
2k views

Directory - /sys in linux

Can anyone explain me what is going inside the /sys directory on a Linux system? I Googled it and got some results, but I need a clear mind on this. Is there anyone ready to give me a short (and ...
0
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1answer
48 views

Will Linux work correctly with full root partition?

Will Linux work correctly when root partition is completely filled up? Let's say my application is running on different partition and has enough space. What about Linux kernel? Will it continue ...
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1answer
92 views

How to rewrite ACPI control tables from Linux?

I have a HP Probook 4720s laptop with broken ACPI tables. The fan is always switched off and the computer tends to overheat and shut down. Under Windows I can use a program called RW_Everything to ...
2
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1answer
738 views

How do I stop rfkill module from hardblocking my wifi, without rfkill command?

I went into my BIOS the other day, didn't change anything, and rebooted. After this, my wifi was hardblocked. I looked online for solutions, and learned of the rfkill command. But I get rfkill: ...
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0answers
18 views

pppd retry issue with multiple wan interfaces

I am using two wan connections in my router with linux kernel 2.6.21. PPPOE Ethernet cable and 3G connection. Both need ppp setup. But boot sequence is different for both. many times 3G disconnect and ...
2
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0answers
69 views

Chipsee 7 inch LCD support in Linux kernel 3.14

Has anybody ported Chipsee 7 inch LCD on Linux kernel 3.14 or later ? Is there any patch available for the same ? If no patches any suggestion porting Chipsee LCD support from Linux kernel 3.8 to ...
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2answers
69 views

installing linux without any packages

I am programming a OS based on Linux but I want to "re-invent the wheel" in this OS just as an achievement. I have been told that Linux can be installed on a PC without any packages (obviously causing ...
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1answer
103 views

Linux Kernel TCP socket functions

So I have been looking through the Linux Kernel v3.8.0-19-generic source code and I noticed that the proto struct, whose members are virtual functions for socket operations depending on the particular ...
2
votes
1answer
483 views

Why is the kernel and the watchdogs consuming all the CPU?

I run a bunch of heavy user space processes on a powerful Xeon machine (32 virtual processors according to /proc/cpuinfo). The CPU load is normally around 30 and the machine feel responsive, but later ...
0
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0answers
35 views

Switch off WIMAX/Wifi Intel 5150 chip under Linux

How switch off WIMAX/Wifi Intel 5150 chip under Linux using command or utilities? I recompile Linux kernel without WiMAX support, but indicator lights on the front panel of my notebook. P.S. Is it ...
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1answer
116 views

Install recent linux version in old computer?

I have tried to install several distros and versions of linux (Ubuntu and Lubuntu, from 13 to 14.04, and Mint 17) without success. Everytime the system blocks while loading the installation. I can ...
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1answer
46 views

Upgrading Linux kernel module without reboot

Is there any way to upgrade linux driver module without rebooting the system ?
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0answers
129 views

/sbin/init exists but couldn't execute it

I'm building Linux from scratch. Currently I have the kernel, glibc and sysvinit. I've compiled everything myself following these instructions. Though my version of glibc is 2.19. Also, I use grub ...
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0answers
156 views

Hide all kernel boot messages/logging when disabling splash screen Lubuntu 14.04.1

In Lubuntu 13.10 I was able to redirect the kernel messages/logging to another tty by adding the following to the Grub file in order to hide all kernel boot messages when disabling the splash screen ...
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0answers
150 views

Disable TCP keepalive on RHEL6

Is it possible to disable TCP keepalive on RHEL6? I know the kernel parameters for tuning TCP keepalive timeout are as follows: net.ipv4.tcp_keepalive_time net.ipv4.tcp_keepalive_intvl ...
0
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1answer
203 views

Which version of the Linux kernel does Firefox OS use?

Firefox OS is described as a Linux-based operating system, but I've never seen any information about which kernel version various releases use. Mozilla's release management only mentions the ...
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0answers
37 views

Xen E820 memory map for domU kernels

How does xen handle E820 memory map for domU kernels? In my specific problem I am trying to map Non-Volatile RAM to domU kernels. The dom0 memory map returns the following relevant parts. ...
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2answers
882 views

Update in grub.cfg file for loading new kernel image in Ubuntu 11.04

I am new to Linux. I am compiling Linux kernel (ver: 2.6.34.12) in gcc in traditional manner in VMware machine in Ubuntu (kernel version - 2.6.38-8-generic) 11.04 version. I am unable to find, where ...
0
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1answer
114 views

Can't load tun module in Linux

I am trying to set up a VPN connection, but OpenVPN fails with ERROR: Cannot open TUN/TAP dev /dev/net/tun: No such device (errno=19) modprobe tun has no effect, and modinfo tun shows that the ...
0
votes
1answer
865 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 ...
0
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0answers
163 views

How may I mount a disk with a Apple / Mac partition table (APM) in Linux?

I've backed up some files from a old Powerbook G4 (AluBook), and I used the Mac Partion manager or whatever to first initialize the disk. It worked, originally, as one large volume, and I copied ...
2
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1answer
1k views

Linux kernel: getting ELAN touchscreen to work, USB debug related

This problem is actually known (ext: ELAN Touchscreen regression in recent 3.12's), but has no known solution up to kernel 3.13.6: [ 3844.533281] usb 2-7: new full-speed USB device number 91 using ...
2
votes
1answer
400 views

IPsec in the Linux Kernel

I have some issues (questions) related tot the Linux Kernel implementation of IPsec and it's user-space interface. The biggest question is which is the actual official project for the Linux Kernel ...
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2answers
102 views

Why do linux kernels include files for all devices?

The kernel for my device includes so many files for other devices and situations that my device cannot use. The kernel carries around the files for everything and is much bigger than just the files ...
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0answers
8 views

How to install cached linux debug symbols?

I am doing work which requires downloading and installing debug symbols multiple times for a specific linux kernel i.e: linux-image-3.8.0-26-generic-dbgsym I'm on a fast university fiber network. ...
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0answers
288 views

What is the exact difference between the parameters (pgpgin, pswpin) and (pswpout, pgpgout) in /proc/vmstat?

Please note that this question is specific to linux only. And by swap space, I mean the dedicated swap partition. I did google a bit on this, and found these definitions: Paging refers to writing ...
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0answers
78 views

unable to find a suitable fs

I am trying to install edx on a virtual machine. But i am getting problem with apparrmor.When i run command. $ apparmor_parser Warning: unable to find a suitable fs in /proc/mounts, is it ...
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0answers
23 views

Is ramdisk_size still needed with a .cpio initrd?

I'm creating a rescue system with the following two files: rescue.linux (version 3.2) initrd.cpio The initrd.cpio file can be quite large, larger than the default 4MB of a ramdisk. However, it ...
0
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0answers
29 views

kernel configuration: select specific drivers or symbols regardless of dependencies?

Is there a way in "make menuconfig" et al. to start with enabling device drivers that you want included, and have it enable the necessary (dependent) generic options and APIs automatically? As it is, ...