Compile Raspberry Pi Linux Kernel

This article record how I compile a usable Linux kernel with Emdebian cross-compiler.

Platform: Debian Wheezy
Cross Compiler: arm-linux-gnueabihf-gcc-4.7

1. Set Emdebian apt repo.
   vi /etc/apt/sources.list
   
   deb http://www.emdebian.org/debian sid main
   
2. Update apt repo. and then add Emdebian keyring. Last, install the cross compiler.
   
   >> sudo apt-get update
   >> sudo apt-get install emdebian-archive-keyring
   >> sudo apt-get install gcc-4.7-arm-linux-gnueabihf
   
3. Set symbolic link of arm-linux-gnueabihf-gcc
   
   >> sudo ln -s /usr/bin/arm-linux-gnueabihf-gcc-4.7 /usr/bin/arm-linux-gnueabihf-gcc
   
4. Download Raspberry Pi Linux kernel source code from github
   
   >> git clone https://github.com/raspberrypi/linux.git
   
5. Clean the build directory
   
   >>ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make mrproper
   
6. Copy Raspberry Pi kernel config file
   
   >> cp arch/arm/configs/bcmrpi_defconfig .config
   
7. Check or Modify kernel features (need libncurses5-dev)
   
   >>ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make menuconfig
   
8. Build kernel Image
   
   >>ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make Image
   
9. If already has a bootable SD card, copy file to replace kernel.img in the SD card.
   
   >> cp arch/arm/boot/Image /media/SD_CARD/kernel.img
   
10. Finish. 

The other kernel config can use and build OK: bcmrpi_cutdown_defconfig

Thinkpad Trackpoint on Debian Wheezy

After install Debian Wheezy, Thinkpad X61 trackpoint can not scroll well.
Add a device configuration about trackpoint in X.org.

Step:
1. Create a directory under /etc/X11
    >> mkdir /etc/X11/xorg.conf.d
2. Create configuration
    >> touch /etc/X11/xorg.conf.d/20-thinkpad.conf
3. Add description for Trackpoint device
    /etc/X11/xorg.conf.d/20-thinkpad.conf
    

    Section "InputClass"
      Identifier "Trackpoint Wheel Emulation"

      MatchProduct "TPPS/2 IBM TrackPoint|DualPoint Stick|Synaptics Inc. Composite TouchPad / TrackPoint|ThinkPad USB Keyboard with TrackPoint|USB Trackpoint pointing device"

      MatchDevicePath "/dev/input/event*"

      Option "EmulateWheel" "true"

      Option "EmulateWheelButton" "2"

      Option "Emulate3Buttons" "false"

      Option "XAxisMapping" "6 7"

      Option "YAxisMapping" "4 5"

     EndSection

Reference:

  1. InstallingDebianOnThinkpadTrackpoint

Change GNOME default Chinese directory name

After I install Debian by select Chinese, the default directory will like 下載,公用 ,音樂, 桌面,文件, 範本.
But it's not easy to use under console.
I want directory look like: Downloads, Public, Music, Desktop, Documents, Templates.

We can use "xdg-user-dirs-gtk-update" to modify it.

Step:

1. >> export LANG=en_US

2. >> xdg-user-dirs-gtk-update

    Then press YES

3. >> export LANG=zh_TW.UTF-8

4. Done

Reference:
1. ubuntu 恼人的中文文件夹如何解决

2. Debian 惱人的中文資料夾名稱