The kernel manages drivers, file systems, inter-process communication, and interrupts.

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Keyboard and Wi-Fi dongle don't work after updating kernel

I have installed Raspbian on my Paspberry Pi and was experimenting with developing for it. I have followed this tutorial and cloned the kernel on an Ubuntu VM to cross compile it with raspberry tools. ...
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48 views

USB Issues with recent kernel build

I am trying to roll my own image for the raspberry Pi, I am using a B+ model Pi. What I want to do is build my own kernel and for now have it load busybox or something similar, but I seem to be ...
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43 views

Raspberry Pi kernel compilation adding Galaxy touchscreen drivers

I am trying to add the eGalaxy touchscreen drivers to raspbian os . Following this link .. http://simonmcc.blogspot.in/2013/08/raspberry-pi-rpi-kernel-build-for.html?showComment=1421908155346 But ...
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45 views

Why I cannot read the temperature/humidity sensor sht20?

I use a temperature and humidity sensor sht20. According to this link: http://www.sensirion.com/en/products/humidity-temperature/humidity-temperature-sensor-sht2x/ It is compatible with sht21, which ...
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57 views

Kernel not updating on Raspbian under QEMU

I'm trying to update my kernel to the latest version. apt is updated and upgraded, and rpi-update finishes without error. However when I reboot, I'm still running the old kernel. Any ideas? $ uname ...
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2answers
46 views

Can I get better performance on Raspbian if I blacklist a lot of kernel modules in raspi-blacklist.conf?

I have a Raspberry Pi that is being used only for displaying a single webpage. I have the memory split set at 64M for the GPU. The display does not require sound, web-video, usb-devices, user-input. ...
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2answers
67 views

Do we need to put i2c code into kernel?

I see codes to make i2c device (e.g. i2c sensors) work in user space, just need kernel to support /dev/i2c-0 or /dev/i2c-1. But whether do we need to put the codes into Linux kernel? For example, if ...
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53 views

insmod segmentation fault error each time I insert a basic module

I'm trying to build some kernel modules on RPI, the ismond work fine for some times, now the insmod command crash each time I try to insert a simple module. the kernel module compile without any error ...
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25 views

What is the right value of GPIO_BASE in Linux kernel for Pi?

According to "BCM2835 ARM Peripherals" page 90, the GPIO registers start from 0x 7E20 0000. While according to kernel file: arch/arm/mach-bcm2708/include/mach/platform.h, as below. #define ...
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23 views

Kernel Panic on Boot with GertDuino

When I boot my RPi with the GertDuino attached and the jumpers set to the Atmel 328 I get a kernel panic where it cant find the rootfs and drops me to a shell, "kdb >". When I place the jumpers set to ...
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747 views

Compile linux device driver in Raspbian

I have some problems with compiling & building a simple gpio driver that I wrote( after THIS documentation). I have a Raspberry Pi Model B+ ( not sure if it's relevant to the question) with a ...
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8 views

I am not able to boot with the latest kernel source ie 3.18.0 with the device tree enabled [duplicate]

I am not able to boot with the latest kernel source ie 3.18.0 with the device tree enabled. I am getting blank screen. I used the [b]latest tools and firmware[/b] to boot. downloaded the code from ...
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2answers
44 views

Is it possible to run only the kernel?

I would like to run some user space application, hence I would like to know whether the followings are possible: is it possible to run only the kernel without Debian? if yes, how can I compile and ...
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1answer
41 views

What is the significance of .y and .y-next in the Raspberry Pi kernel branch names?

The Raspberry Pi kernel repository has branch names that end in .y and .y-next? For example, rpi-3.17.y and rpi-3.13.y-next. What is the significant of the .y and .y-next?
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55 views

Systel level differences in making a GPIO high in Raspberry PI vs Beaglebone

I understand the Raspberry PI uses the previous Kernel and the Beaglebone Black uses the one after and both do a great job for different applications. I would like to know what is the difference in ...
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1answer
100 views

Xenomai to Raspberry

I want to get Xenomai working on my Raspberry. Unfortunately I am not very familiar with compiling kernels. I am using this documentation to get it work: ...
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137 views

Kernel .config necessary options

I just upgraded from 3.13.6 to 3.17.1; when I upgrade I usually do not change anything, I just use the previous .config (from /proc/config.gz) and update it via make oldconfig (or make menuconfig, ...
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81 views

Using I2S/PCM on the P5 header

I am trying to get audio capture through a custom codec board that is using I2S to communicate the audio data. I'm having trouble finding support for using I2S. There was a lead here although the ...
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83 views

Kernel compilation failed when enabled DEBUG

I am compiling a kernel for my raspberry pi (on the pi). I checked necessary configuration and enabled DEBUG_INFO=y and REDUCED_DEBUG=n. But when I issue the command make I get the following error: ...
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152 views

Does the kernel support a BMP180 BMP85 digital pressure sensor out of the box?

The kernel generates a virtual file with the values for the famous temperature sensor DS 18B20. Is there a plug and play kernel support for the I2C digital pressure sensors BMP180 and BMP85 too? ...
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755 views

Best approach for real time operating system on Raspberry Pi

I need to use Raspberry Pi with a real time operating system. Of course, I want the best solution. I've searched some options, including custom kernel compilation, ready to install RTOS. So, which ...
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445 views

eGalax Touchscreen support, without kernel recompile, raspbian OS

I have been using a custom compiled raspbian OS, with eGalax touchscreen support. The problem is every time there's some upgrade or a major version change in the OS or firmware, I have to recompile ...
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38 views

panic by alternating modprobe / rmmod

I had problems with fswebcam, which I use in a script to take periodically snapshots with my small Logitech webcam. Googling around I found out that in case of error you could issue the two commands ...
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419 views

Disabling IRQ #32

suddenly, out of the blue, I got this message: Message from syslogd@raspberrypi Kernel: [1277.201127] Disabling IRQ #32 and my pi gets frozen. any idea ? Thanks
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272 views

Colored screen when booting raspbian from noobs

i have a raspberry pi model b with noobs and raspbian installed on the sd card. ive used it for quite a while but today when i boot the pi it just shows me a colored screen and i cant do anything. i ...
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96 views

Kernel module doesn't call probe function

I'm writing a kernel modul which should work on i2c. The problem is: the probe function doesn't load automatically. AFAIK, it should be called with a correct device driver name. Please correct me if ...
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108 views

How to get a specific kernel version for Raspberry Pi Linux?

I'm trying to find the source for version 3.12.20, but the current 3.12.y version on GitHub is 3.12.24. I understand I can just update my current version, but shouldn't downloading the source for my ...
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427 views

Cannot update or install DBus

I've been trying to connect A bluetooth dongle to a bt breakout board (kernel 3.12). Both of them show up with hcitool scan and dev. I've already installed bluez5 that keeps complaining about dbus: ...
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54 views

From python script to Kernel Module

So I have a python script that emulates an ESC_KEY on pin 17. #!/usr/bin/env python #Imports for Pins,input import RPi.GPIO as GPIO import uinput from time import sleep #Setup key_events=( ...
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1answer
65 views

How to get kernel source corresponding with the kernel installed by rpi-update

After an upgrade using rpi-update the kernel could be upgraded. The script download the kernel from an other gihub repository rpi-firmware. Till now, in order to get the kernel source, I download ...
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328 views

Raspberry Pi freezes during boot

I can't get past the attached picture. Nothing happens anymore. The red light is always on. I don't have anything plugged in the USB. It just stays there, and the cursors continues blinking. Also, at ...
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USB camera originally designed for PC hardware and kernel 2.x

I wonder if this is off-topic. Basically, I want to get some idea before spending expensive money on international mail order. The question is really getting comment on how compatible is Linux on ...
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708 views

How to ILI9341 SPI TFT display make work

I bought this display: There it is. After installing drivers for it( drivers are here ), display works, but only quarter of screen works and whole screen is flickernig. My kernel isLinux NETRUNNERHUB ...
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172 views

Trouble with rpi-source (hello world kernel module)

the first time I ran rpi-source (https://github.com/notro/rpi-source/wiki) I had no trouble at all getting the hello world kernel module to run. I deleted the kernel headers, and when I now run ...
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What's the difference between Rpi kernel source and Rpi distro kernels?

I need a specific kernel module (driver for a USB grabber), which is included in kernel 3.12. So, I went for Pidora, which features kernel 3.12 but was surprised, that the module wasn't included in ...
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1answer
408 views

Why I can't update kernel version?

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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18 views

Why we added lib and firware to Linux kernel

I am new to raspberry pi. I was building the Linux kernel for raspberry pi . I followed the link : https://wiki.aalto.fi/download/attachments/84751497/compiling_kernel_final.pdf?version=3 In this ...
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2k views

PANIC: VFS: Unable to mount root fs on unknown-block(179,2)

I unplugged my RPi (RPi#1) and moved it to another power outlet, and plugged it back in. RPi#1 is the brains of my distributed setup, containing the database and biggest SD card. All of the data my ...
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1answer
141 views

download kernel source code : error : Not enough diskspace (900MB) on /root

I need to download the source code of my current kernel with rpi-source command I receive an error Not enough diskspace (900MB) on /root I have an 8GB SD card. ubuntu shows me two partitions one ...
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1answer
361 views

restore kernel version

I have the Raspbian 3.12.X , and I want to compile modules, so I installed a distribution with kernel headers sudo apt-get install linux-image-rpi-rpfv linux-headers-rpi-rpfv Then, I tell raspbian ...
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2answers
100 views

Raspbian kernel source compilation configuration

I try to compile Raspbian, [ http://hermess.no-ip.org/rpi/index.php ] when I Prime kernel with the old config: make ARCH=arm CROSS_COMPILE=${CCPREFIX} oldconfig I get a lot lot of dialog messages, so ...
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3answers
1k views

DHT11 module compilation error

I try to compile the source code of DHT11 module given in [https://www.endian.se/content/?p=127] . I have followed the step of KERNEL compilation in ...
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257 views

After building my own kernel I cannot load any module

Story of my life I built my kernel according to: http://elinux.org/RPi_Kernel_Compilation. I was able to boot my 3.14 kernel image. However when I want to insert rt2800usb I get the errors listed ...
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1answer
2k views

How to change the kernel commandline for ArchLinuxARM on Raspberry Pi effectly?

I'm using the raspberry pi with the latest ArchLinuxARM image. I'm having issues with the linux kernel and it randomly panics with 'kernel paging request' errors. I've found a solution to enable ...
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78 views

“Bind” linux kernel to a specific cpu?

I'd like to build a linux kernel that's specific to a given Raspberry, ie. one that won't boot on any other Raspberries. My idea is to bind the kernel to the cpu's serial number bit I haven't found ...
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1answer
222 views

Redirecting stdout and stderr to UART

I am building my own cross-linux-from-scratch (CLFS) system for Raspberry Pi. I already build whole system, I prepared SD card and now I try to boot. I am redirecting all kernel output to serial ...
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1answer
464 views

Installing kernel 3.10.24 headers on raspbmc

I'm trying to build drivers for my wifi dongle (a LogiLink WL0084B), but for that I need to download kernel headers for my current kernel (3.10.24). I'm using raspbmc. Sadly I cannot find where to ...
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97 views

how to create a boot parition in SDcard for a custom kernel image?

I have a problem in creating a bootable disk parition (SD card) for raspberry pi. I have a raw binary executable image on a mini os kernel called 'xinu'. I know this kernel is working because i have ...
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0answers
141 views

Issues getting specific Raspberry Kernel Sources from Github

I have a Issue getting the Kernel Sources for the Raspberry from Github. To be clear, I have no Problem in getting them as such, but for a specific Kernel Version of the 3.10.y-Branch, lets say ...
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299 views

Updating kernel/firmware to specific version

I've updated my rPi to the latest kernel/firmware using rpi-update and my Bluetooth dongle stopped working. I found this to be a known bug in 3.10.* branch of the kernel. Through tinkering and ...