Using make-kpkg to build a custom Linux kernel for your VAIO

2003-02-04 15:10:00 +0000

Debian provides a powerful utility called make-kpkg for compiling your own custom kernels. It integrates tightly with dpkg by making .deb files and you can even use this to prepare your kernel image on a faster system. Later on it will make complex operations, such as compiling in patches and modules, a snap.

To get it:

# apt-get install kernel-package libncurses-dev

libncurses-dev is not strictly necessary, but provides the libraries we will use later for configuring the kernel in the easy to use curses interface (make menuconfig).

You will also need a copy of the kernel source. You can download it directly from ftp._xx_.kernel.org/pub/linux/kernel/v2.4 (substitute your two-letter country code for xx) or you can install a debianised version from your local repositary. The Debian package (kernel-source-2.4.20 - or latest since) contains a few extra patches useful for a debian system.

The debian package will install the latest version of the source to the /usr/src directory. You will need to place it there yourself, if you download it directly off a kernel mirror.

Change to the /usr/src directory and check the source is there before un-tarring it with:

$ tar -zxf kernel-source.2.4.20.tar.gz .

It is also good form to create a soft link to the default source working directory:

$ ln -s kernel-source.2.4.20 linux

We shall assume you created the link for the rest of the instructions. Now change to the /usr/src/linux directory and being configuring your kernel:

$ make menuconfig

Prepare your kernel for later chapters by installing the ACPI patches, and by setting the following sets of kernel options now:

Firewire DVD-ROM drive:

CONFIG_SCSI=m (SCSI Support ---> SCSI Support) CONFIG_BLK_DEV_SR=m (SCSI Support ---> SCSI CD-ROM support) CONFIG_IEEE1394=m (IEEE 1394 ---> IEEE 1394) CONFIG_IEEE1394_OHCI1394=m (IEEE 1394 ---> OHCI-1394) CONFIG_IEEE1394_SBP2=m (IEEE 1394 ---> SBP-2) CONFIG_ISO9660_FS=m (File systems ---> ISO 9660) CONFIG_JOLIET=y (File systems ---> Microsoft Joliet) CONFIG_ZISOFS=y (File systems ---> Transparent Decompression extension) CONFIG_ZISOFS_FS=m (automatic) CONFIG_ZLIB_INFLATE=m (automatic)

Wireless Networking:

CONFIG_PCMCIA=m CONFIG_NET_RADIO=y CONFIG_HERMES=m CONFIG_PCMCIA_HERMES=m CONFIG_NET_WIRELESS=y

External Firewire hard disks:

CONFIG_BLK_DEV_SD=m (SCSI Support ---> SCSI disk support) CONFIG_SD_EXTRA_DEVS=40 (automatic) CONFIG_CHR_DEV_SG=m (SCSI Support ---> SCSI generic support)

Apple iPod (experimental support):
This is optional. If you don’t have an Apple iPod, then you needn’t set these options.

CONFIG_IEEE1394_RAWIO=m (IEEE 1394 ---> Raw IEEE1394 I/O support) CONFIG_PARTITION_ADVANCED=y (File systems ---> Partition Types ---> Advanced partition selection) CONFIG_MAC_PARTITION=y (File systems ---> Partition Types ---> Macintosh partition map support)

Intel i820 onboard soundcard:

CONFIG_SOUND=m (Sound ---> Sound card support) CONFIG_SOUND_OSS=m (Sound ---> OSS sound modules)

Then, compile the .deb:

$ make-kpkg clean $ fakeroot make-kpkg --revision=whatever kernel_image

It is essential to run the first command to synchronize the make-kpkg scripts. A sensible revision naming scheme would be to replace whatever with a description of the destination machine and an internal version number eg, srx87.1.0.

Once the kernel has finished compiling it should leave (in the parent directory), a file called kernel-image-2.4.20_whatever_i386.deb. As root run:

# dpkg -i kernel-image-2.4.20_whatever_i386.deb

Note: This doesn’t build you an initial ramdisk, so your hard disk driver (IDE) and initial filesystem (ext3) will need to be compiled into the core kernel binary. I (Roger) wasted an entire Sunday rebuilding my Vaio when I forgot this.

Credits: Caoilte O’Connor wrote this page of the instructions. Thanks for that, Caoilte.