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Signing your kernel modules on Ubuntu 16.04

I have an Asus UX3410UA laptop. To silence the fan I use ACPI calls to adjust the fan tipping point. See this. This needs the kernel module “acpi-call-dkms” for being able to run the “acpi_call” executable. If secure boot is enabled on a computer this module will not load if it is not signed andContinue reading “Signing your kernel modules on Ubuntu 16.04”

Building a Kodi in-car entertainment system using a Motorola Atrix Lapdock and an Odroid C0

Watching movies in the car is great fun. It is even better when you have a camper and lie in your comfy sleeping bag – I needed an in-car entertainment system.I have a stereo in the car already that can even play videos, but the screen is small, codec support is limited and it isContinue reading “Building a Kodi in-car entertainment system using a Motorola Atrix Lapdock and an Odroid C0”

Useful Linux scripts for standalone systems, emulators, HTPCs etc.

Booting the system to console with grub2 Edit the file /etc/default/grub: Change the line GRUB_CMDLINE_LINUX_DEFAULT to include “text”: Save the file and update grub: Note that on systemd systems this might not be enough. Switch to text mode using this: You can switch back to graphical mode using “graphical.target”.Now reboot. Auto-login user on console tty1Continue reading “Useful Linux scripts for standalone systems, emulators, HTPCs etc.”

Installing and switching gcc/g++ versions in Debian

Installing newer gcc/g++ versions is easy: If your system does not provide the new versions, you might still be able to get them via a different repository. Add the toolchain repository to your system and update your sources: Now you should be able to install gcc/g++. The real problem comes after that. How to makeContinue reading “Installing and switching gcc/g++ versions in Debian”

Arduino Leonardo as a MAME interface

UPDATE: I made the thing a project on GitHub. You can find information and can download the source code for the Arduino and PC programs from the project page. Ok. So I found this old arcade cabinet for 1,50€ 😀 on Ebay and managed to carry it up the stairs. Looks dandy and even hasContinue reading “Arduino Leonardo as a MAME interface”

Reading the OpenGL backbuffer to system memory

Sometimes you are in the need to read back the OpenGL backbuffer, or other framebuffers. In my case the question was how to read back a downsampled framebuffer resp. its texture to system memory. There are different methods for this and I wrote a small benchmark to test them on various systems. UPDATE #1: AContinue reading “Reading the OpenGL backbuffer to system memory”

Using an USB joystick or gamepad in XBMC on Ubuntu

Now I have those cheap USB gamepads, XBMC running, the ROM collection browser addon and MAME all set up. Awesome! But why can’t I navigate XBMC with my joystick to select games and adjust the volume etc?! Here’s how to solve that problem… 1. Prequisites First of all you need joystick support and some tools.Continue reading “Using an USB joystick or gamepad in XBMC on Ubuntu”