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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1answer
235 views

CONFIG_CMDLINE_OVERRIDE set but hardcoded vga-boot-parameter ignored?

I have build a custom linux kernel with the options: ... CONFIG_CMDLINE_BOOL=y CONFIG_CMDLINE_OVERRIDE=y CONFIG_CMDLINE="initrd=linux_os.gz root=/dev/ram0 init=/sbin/init ramdisk_size=25600 ...
2
votes
1answer
3k views

dkms does not find kernel source

For days now I am trying to get ZFS-on-Linux working on Debian 7 but the module doesn't want to compile: # dpkg-reconfigure zfs-dkms ------------------------------ Deleting module version: 0.6.3 ...
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0answers
27 views

How to disable USB Mouse only

I was developing a device driver for a USB mouse which uses the USB HID driver. The problem is that I cannot test out my module as Linux takes over the mouse directly. So how do I find out which ...
0
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0answers
76 views

What HID/Module does Air mouse use in Linux?

I was thinking about developing a module for running a Air Mouse. I am not sure as what module s used to carry out the operation done by air mouse. Is it under HID? (I am talking about a wireless Air ...
0
votes
1answer
271 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 ...
0
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2answers
134 views

Why does the /dev directory exist?

In Linux, there is the /dev directory, which is a special directory which contains all of the files for devices and other things like random, urandom, etc. Why did this directory exist? Was it just ...
0
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1answer
456 views

NO <DUTY, RUN, PERIOD, POLARITY> in bone_capemgr.9(ocp.2/pwm_test_P8_13.#)FILE Beaglebone Black

I just a fresher did the servo test with my BBB, however, when I use some command as ...
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0answers
193 views

How to install kernel 3.9 in Debian Jessie from repos?

I was wondering if it is possible to install kernel 3.9 in Debian Jessie from repos. A brief check shows that there are only 2.6, 3.2 and 3.13 kernels in repos Compiling my own kernel is the last ...
0
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1answer
109 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 ...
0
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1answer
527 views

Error in kernel 2.6.32 compilation and stable kernel 2.6.32 source needed for customization

I am using Ubuntu 10.04 LTS with kernel 2.6.32-21-generic , and Ubuntu 10.04.4 LTS with kernel 2.6.32-38-generic. While I am trying to compile the source for both kernel version - 2.6.32-21-generic ...
2
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1answer
2k views

linux; return “RTNETLINK answers: Operation not supported” for dummy interface creation

I am trying to create a L3 interface in kernel v3.4.34, that is not attached to a physical interface/device and this is to be used purely as a management interface as an externally visible interface ...
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1answer
128 views

Minimal OS with less background process [closed]

I am currently doing experiments on L1/L2/L3 cache. Measurement of L1/L2/L3 cache access time fully depends on where is my current data present, and that also depends on background process of OS ...
1
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1answer
2k 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 ...
1
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0answers
301 views

Linux - How to list all device nodes using a specific device driver

I know I can see what driver is being used for a device node if I know the major and minor number of the device(see this link). But I want to know if there's a way to list all device nodes that are ...
2
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1answer
2k 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 ...
0
votes
1answer
158 views

Linux 2.6.39.4 how to find available loadable kernel modules

I'm customizing the 2.6.39.4 linux kernel on an arm platform and trying to test out a "Hello World" driver I created. I selected "M" (loadable) in the kernel make menuconfig and verified that it ...
2
votes
1answer
294 views

How Fake raid communicates with Operating system(Linux)?

I am a programmer, I studied about software, hardware and Fake raid's and I am unable to understand how fake raid communicates with operating system (Linux)? I mean which software layer or driver ...
2
votes
1answer
390 views

Linux: Is it possible to know if my kernel has support for “policy routing” enabled?

I am following these instructions in order to configure multiple default routes for Linux (I am testing it on Ubuntu v12.04 and Kali v1.0.6), and the feature "policy routing" is requested enabled in ...
2
votes
1answer
2k views

nfs and cifs shares hanging from Linux

I've got a NAS (Dlink DNS-323) that I mount from my linux box. It used to work fine, and then I upgraded my distro (apt-get upgrade). I'm running Linux Mint Debian Edition. Current kernel is: ...
0
votes
1answer
272 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 ...
0
votes
1answer
34 views

building custom kernel on redhat 9

I'm trying to build a kernel 2.4 on redhat 9. but when I go through theses steps: make menuconfig make dep make bzImage make install they return no error but when I try to boot into it, it returns ...
1
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1answer
218 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 ...
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0answers
152 views

getting error while adding a system call

I'm using Ubuntu 12.04(64bit) and installed kernel version linux-2.6.37.3. My device is ASUS x201ev net-book(64 bit). I'm providing the link of procedure i used. i edited unistd_64.h file also and ...
1
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2answers
31 views

Where can I find submitted Linux patches?

Is there a central repository that holds Linux kernel/driver patches that have been submitted, but not yet integrated into a kernel release? Ideally, such a repository would be searchable by kernel ...
3
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1answer
599 views

Why is INSTALL_MOD_STRIP not on by default?

I haven't compiled Linux kernels in a couple of years, and now that I started doing so again I discovered that modules are installed with debug symbols by default unless INSTALL_MOD_STRIP=1 is passed ...
1
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1answer
536 views

Linux: Random kernel oops in mmap functions

For the last month or so I've been getting seemingly random kernel oopses. I've started to notice a pattern: from looking at the traces, the call trace always involves mmap functions. Whenever one of ...
1
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1answer
225 views

Linux root filesystem on custom hardware

I have a custom-designed SoC implemented on FPGA, based on an ARM-processor clone, on which I am trying to boot Linux (kernel 3.10). I have successfully added support to my custom peripherals (an ...
1
vote
1answer
1k views

How to get ID 148f:5370 Ralink Technology, Corp. RT5370 Wireless Adapter running on Ubuntu 12.04

I've got issues getting ID 148f:5370 Ralink Technology, Corp. RT5370 Wireless Adapter to run ob an Ubuntu 12.04 box. I've downloaded latest sources from http://www.mediatek.com/_en/07_downloads/dl.php ...
1
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0answers
134 views

My own linux corded keyboard driver and interface to my embedded application

I want to develop my own keyboard driver to my own keypad. I have to use GPIO to identify Key Events and use I2c to get scan code. I am going to develop the driver like this. #include ...
0
votes
1answer
757 views

Building Custom Kernels for ChrUbuntu on Samsung Chromebook XE500C21

I am trying to build custom kernels for my Samsung XE500C21 running ChrUbuntu. I need kernels that are at least 3.4.0 because I'm trying to run VMWare Workstation. I am running ChrUbuntu 13.04. I have ...
1
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2answers
2k views

Error when compiling Linux kernel

I get an error when trying to compile Linux kernel 3.8.0-32 on Elementary OS Luna, based on Ubuntu. I have a Lenovo S400 notebook, and the command I used is: sudo make-kpkg --initrd ...
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2answers
163 views

Running OS X command-line programs on Ubuntu

Given that Mac OS X is derived from BSD (Berkeley Systems Distribution) UNIX, I would assume that in some way or another, it would be possible to run command-line OS X programs on Ubuntu. I am really ...
1
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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: ...
1
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1answer
709 views

Linux kernel - check currently used drivers

Is it possible to check what drivers from linux kernel source are used for currently working devices in the system? I know that usually device drivers are written as kernel modules, but some of them ...
0
votes
1answer
180 views

How should I prioritize specs for a Linux Kernel development workstation/system? [closed]

I'm working on a Linux Kernel development project (specifically OpenEmbedded/Yocto Project) in which kernel and embedded software compilation is the primary task and my laptop with a dual-core Core ...
2
votes
1answer
262 views

How to make Linux reliably boot on multi-cpu machines?

I've got two machines, one with 4x12 AMD Opteron cores (AMD Opteron(tm) Processor 6176), one with 2x8 Xeon cores (HT disabled; Intel(R) Xeon(R) CPU E5-2660 0 @ 2.20GHz). On both machines I experience ...
1
vote
2answers
780 views

What are the Compile time considerations to reduce the size of binary on Linux?

I have compiled one utility and created the binary on my Linux System. But the size of this binary is 2.3 MB and I need to reduce the size of this binary. I tried applying STRIP on the binary but its ...
0
votes
1answer
917 views

How to disable logging to serial terminal - embedded linux

I have an embedded device running embedded linux and I connect to it using a serial port. I am capturing the logs I need using cat proc/kmsg into a file in a background process. I would like to not ...
0
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2answers
115 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 ...
1
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0answers
739 views

DKMS failing to complete in Ubuntu 12.04

After my last attempt to run an update with sudo apt-get update; sudo apt-get upgrade I got into a never returning update step (see below). So far I can only Ctrl+C but it will be triggered again ...
2
votes
1answer
118 views

Debian loses harddisk on bootup 4 times and then boots. Why?

Dmesg Dump: http://paste.debian.net/44975 at time 32.832045 That error is delaying my boot process significantly. Does anyone know what this is about? Devices: Maxtor IDE drive with new cable on ...
3
votes
1answer
1k 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 ...
3
votes
1answer
732 views

Microphone not working on Apple Macbook Air 1,1 (Early 2008; A1237) under Linux

I'm running Linux on the MBA. I can't make the microphone work. I test using alsamixer and arecord -Dhw -fdat -vv mic.wav together with aplay -Dhw -vv mic.wav It seems there is a problem with Linux ...
0
votes
1answer
747 views

how do Major number and minor numbers used to locate file operation for drivers?

I am beginner at the device driver.... I would like to know how the file operations are located from device files and drivers using major and minor numbers ?
0
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2answers
6k views

Booting linux without bootloader

I installed Ubuntu-Server in Oracle Virtual Machine and it failed grub install step. At the end of install it gave me a message: You need to manually boot linux /vmlinuz kernel on partition /dev/sda1 ...
2
votes
1answer
858 views

Kernel bypass possible with non-specialised NIC?

Is it possible to perform kernel bypass and have a NIC send data to the user space (where I will write my network stack) with no copying, without having to purchase a specialised Solarflare etc NIC?
0
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1answer
512 views

Error building mvfs

I am trying to build mvfs so that I can run IBM Rational ClearCase on a CentOS 6.4 machine. I have all the dependencies installed so I cd to the mvfs_src folder and get the following error while ...
0
votes
1answer
1k views

Configuring DRAM size when compiling an ARM (linux-sunxi) kernel for an allwinner a10 tablet

I've got a goclever a103 tablet (http://goclever.com/goclever_tab_a103) and I want to install linux on it to boot it from an SD card. First thing I found online were SD card images for a very similar ...
0
votes
1answer
652 views

Tar of Linux Kernel corrupted error while untaring

I have downloaded two versions of Linux kernel 3.9.9 and 3.10 from kernel.org. When I am trying to untar this file I am getting this error Lzma library error: Corrupted input data . I am not ...
0
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0answers
28 views

Missed record in GRUB

I did install a new linux kernel from deb packages and run reboot. This new kernel replaced my current one. But the new kernel caused corrupted and it fails on booting (no console and no X... just ...