[LAD] exciting news about the realtime kernel tree

Hans Fugal hans at fugal.net
Fri Feb 27 15:24:15 UTC 2009

Lars-Erik Helander wrote:
> An interesting/important question though is how many of these 50+
> modules actually contains hw specific adaptions. As an example, for
> audio apps you typically rely on a number of sound ("snd-*") related
> modules of which a fair amount is hardware independent. It is only the
> modules that implement hardware specific adaptions that needs to go
> through the "tedious" identification process.
> I guess that the BIOS will leave most hardware components in a state
> where they do not generate "interrupts" unless some kernel or userland
> code explicitly turns this on. If this is true you should probably be
> able to have a working system with a minimum set of modules. Anyone
> that have some experience in creating a system with a minimum set of
> hardware adaption modules? If so, what are the minimum set of hardware
> adaption modules required?
> /Lars

Always ALWAYS make sure you have your hard disk and root file system.
(This may seem obvious but going from a distribution's .config to a
hand-rolled kernel with make oldconfig can backfire if you don't also
make an initrd.)

Keyboard and Video also come to mind. Once you have that, you can
recover from a forgotten module by recompiling and rebooting. Obviously
a known-good kernel is good too.

Hans Fugal ; http://hans.fugal.net

There's nothing remarkable about it. All one has to do is hit the
right keys at the right time and the instrument plays itself.
    -- Johann Sebastian Bach

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