Using a custom kernel and loader.o
Plenty of other people have already written how to's. You must have udev installed or the 2.6 kernel will not work. Check out this page on Migrating to the 2.6 kernel. Other useful pages are How to apply a kernel patch and this article on compling a kernel
Download the vanilla kernel source, untar it, and move into the source directory.
wget ftp://ftp.kernel.org/pub/linux/kernel/v2.6/linux-2.6.15.tar.bz2 tar xvjf linux-2.6.15.tar.bz2 cd linux-2.6.15
Download the Kurobox kernel patch. Note: The following patch does not work with the standard Kurobox. Use the patch located at http://www.kurobox.com/downloads/gentoo/kurobox-sources-188.8.131.52.patch.bz2 for the standard Kurobox.
Whatever patch you use, you need to unzip it and apply it. You may need to adjust the name of the patch.
bunzip2 kurobox-sources-2.6.15.patch.bz2 patch -p1 < kurobox-sources-2.6.15.patch
Next we need to configure the kernel. There is a basic configuration with each patch. For the Kurobox HG do this:
cp config_kuroboxhg .config
For the standard Kurobox do this:
cp config_kurobox .config
If you want to use the standard kernel type this:
If you want to customize your kernel type this:
Javascout explained how to turn off I2c kernel messages (which make the dmesg for the standard Kurobox useless). Just do this:
make menuconfig select device drivers select i2c section turn off the i2c debug messages (last 4 choices)
Make the kernel and make and install the modules
make vmlinux modules modules_install
Loader.o needs a binary of the new kernel. We'll convert our new kernel and put the new kernel in /boot
objcopy -O binary vmlinux /boot/vmlinux-2.6.15-kurobox
Change to /boot
If you don't have a copy of loader.o in /boot you should download a copy from the Gentoo downloads area. I'm not sure if this one works with the HG, but it does work with the standard Kurobox.
Sync the drive, load the kernel into memory, and jump to the new kernel.
sync;insmod loader.o kernel=vmlinux-2.6.15-kurobox
If your new kernel works you can setup the Kurobox bootloader (more on this later).