On Sunday 13 July 2003 14:09 pm, Klaus-Peter Schrage wrote:Yes, Bruce and Lonni, thanks, you are right, and I have learned something which I never was really clear about.
Bruce Marshall wrote:
Supposing there is a device I just invented called a Belchfire 90 mob-ulator... and I write a module for it. How could the kernel possibly use my module? It wouldn't know when to call it... Same thing goes for a new USB device that hasn't been defined to the USB modules.
If the ALSA modules can be compiled and supplied out of the blue... then either they don't rely on the kernel or the kernel has been
told about them.
Telling the kernel about foreign modules, isn't that the job of the "alias" lines in modules.conf? There I have: .. alias snd-card-0 snd-ice1712 .. alias char-major-195 nvidia among many others, the right-hand side always pointing to a file in /lib/modules/2.4.21/kernel/ Klaus
Not in my not-so-expert opinion. The purpose of the alias statements are to tell the kernel that instead of looking for module xyz that it would normally look for, instead look for module qrs. Just an alias for a module that was already being looked for. But if the kernel didn't know to look for xyz... the statement would have no effect.
In your first alias above... (snd-card-0), the kernel may get a request to call the sound card module (snd-card-0) which really is just a pseudo-name for any of a dozen or more modules that handle various sound cards, and the alias above is going to get the right card module for YOUR system called. My alias for the same snd-card-0 looks like:
alias snd-card-0 snd-ens1371
(We have different sound cards)
But, back to my initial point (I really don't want to bug), you can add a single kernel module after the kernel build. If I just would have taken a look at the good old kernel-howto before all this ...
http://www.ibiblio.org/pub/Linux/docs/HOWTO/other-formats/html_single/Kernel-HOWTO.html#AEN272
Klaus
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