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+====== Note ======
+This information is WAY out of date and is kept for historical purposes only.
+===== Getting ready =====
+Go to [[https://github.com/raspberrypi/linux]] and download the tarball of the kernel source to your home folder.
+Run the following after it has downloaded:
+<code>tar -zxvf your_filename.tar.gz</code>
+Now update the sytem as follows:
+<code>
+apt-get update
+apt-get -y dist-upgrade
+apt-get -y install gcc make bc screen ncurses-dev watchdog</code>
+Clean the build folder by running:
+<code>make mrproper</code>
+To get the correct config for the PI2/3:
+<code>KERNEL=kernel7
+make bcm2709_defconfig
+</code>
+===== Compile the Kernel=====
+In the build folder, run the following to set the configs and then generate a menu:
+<code>make menuconfig</code>
+This where we have to check that the OSS modules are installed.  (By using the .config it should).  But it also gives us a chance to unload any crap we do not need from the kernel to streamline it.
+We also need to disable the frequency scaling and power saving.  Both of these affect the audio on the dongle.  Find the option //Disable watchdog shutdown on close//.  This will mean on a reboot and there is a hang, it will force a reboot.
+After this is complete, make the modules and headers required to compile other software:
+<code>make -j4 zImage modules dtbs
+make scripts
+</code>
+=====Install the Kernel=====
+So both the Kernel and the source is the same, we have to install the new kernel.  If you are upgrading Kernels, you will need to update the firmware too.
+Install the Kernel modules and overwrite the lib folder as required:
+<code>make modules_install
+make headers_install
+sudo cp arch/arm/boot/dts/*.dtb /boot/
+sudo cp arch/arm/boot/dts/overlays/*.dtb* /boot/overlays/
+sudo cp arch/arm/boot/dts/overlays/README /boot/overlays/
+sudo scripts/mkknlimg arch/arm/boot/zImage /boot/$KERNEL.img
+</code>
+=====Watchdog setup=====
+Edit the /etc/modules file
+<code>nano /etc/modules</code>
+Enter the following in the last line of the file:
+<code>bcm2709_wdog</code>
+Save that file.  Now we need to edit the /etc/watchdog.conf.  Uncomment the lines:
+<code>#max-load-1   = 24
+#watchdog-device = /dev/watchdog</code>
+Finally we need to make sure it starts on boot:
+<code>update-rc.d watchdog enable</code>
+Save this file and Reboot the pi.

VK3SMB

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