Questions tagged [kernel]

The kernel is the central component of the operating system and manages hardware, process scheduling, file systems, virtual memory paging, inter-process and network communication, etc.

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buildroot and rpi-firmware

I am able to bring up a minimal kernel using raspberrypi_defconfig in buildroot. I noticed that there are some .ko files in the rpi-firmware package downloaded from git. How can I include those into ...
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1answer
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Building Linux Kernel for Driver Creation

I am attempting to compile the kernel for the RPI using Raspbian. These are the steps I took... (1) Imaged the SD card from http://www.raspberrypi.org/downloads (2) Downloaded the kernel from and ...
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Need to modify kernel module loading

I have a Rosewill RNX-N180UBE (with Realtek RTL8191SU chipset) that I want to work with Raspbian Wheezy (Raspberry Pi). Right now "lsmod" shows that the wifi driver being loaded is "r8712u", and ...
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How to make Raspberry Pi suspend to RAM?

My application only uses Pi very occassionally and only a few seconds each time. It would be ideal if Pi supports suspend to RAM feature to save maximum energy. (I am thinking of the next step of ...
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1answer
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GPIO in kernel module: alternative to gpio_set_value

Goodmorning, i've found out that in a kernel module gpio_set_value and gpio_get_value are very slow (60 useconds). According to this site, http://codeandlife.com/2012/07/03/benchmarking-raspberry-pi-...
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Raspberry Pi Cross-Compilation Failure (arm-linux-gnueabi-gccgcc)

I am cross compiling a Linux kernel for my Raspberry Pi from an AMD64 Ubuntu 13.04 system. I found this page to be of help (How do I cross-compile the kernel on a Ubuntu host?), but I still get errors ...
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1answer
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Interrupts on the Raspberry Pi

What are the sources of interrupts on the Raspberry Pi. I currently have the model B, rev. 2.0. Example itop output: INT NAME RATE MAX 3 [ 8 Timer Tick] ...
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No image file after make (3.6 kernel compiling) [closed]

Overview: I wanted to compile 3.6.11+ linux kernel for my raspberry, after the make command, there were no image files in arch/arm/boot. What I've done: 1 Download the linux code from github.com/...
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How can I read and write data to a Character Device File in Linux with PHP? [closed]

I'm trying to read and write to modules on the I2C bus on a Raspberry Pi using PHP. I'm using fopen() and fskeek(). Below is the code I've been trying to use to read data coming in from the physical ...
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2answers
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Raspbian source code

I´m using Raspbian on RaspBerry Pi and it´s working ok, but now I want to modify the distro according to my needs. I know the source for the kernel is found in kernel.org, but I haven't been able to ...
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1answer
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Schedule periodical processes

I have a project that I´ll be using RaspBerry Pi to make a controller for process control. To do that I need to schedule processes periodically. Does anyone know how I could do that? So I have to ...
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Raspbian missing modules in lsmod output

when I type lsmod I get the output below. But I am missing all the other but the sound modules. Why are no other modules shown? I am using the latest Raspbian release (12/16/12) root@raspberrypi:~# ...
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raspberry pi booting failed on custom kernel [closed]

hello I have compiled my custom kernel and pack initramfs into it. I have created two partition fat32 and ext3. fat32 contains bootloaders and kernel and ext3 contains rootfs. I have made a raw disk ...
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993 views

Arch Linux kernel panics and firmware not working [closed]

Before the update I had linux-raspberrypi-3.1.9-33-arm and raspberrypi-firmware-20120418-2 installed. After I upgraded to raspberrypi-firmware-20120729-1, the kernel refused to boot (no kernel panics ...

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