The problem is with kernel > 2.6.22.  There were a modification in 
drivers/acpi/ec.c that makes all kernel > 2.6.22 useless with toshiba P100 
notebooks.  Ubuntu 7.10 backported patches from 2.6.23 in their 2.6.22 kernel.  
From now, one of the solution modify kernel sources.  
I just wrote to the main kernel developer who did the modification in 
drivers/acpi/ec.c that make problem exist.  I just hope there will be a 
solution for kernel 2.6.24, because the problem is still there in 2.6.24 rc2.
Currently, i can't help ubuntu users to create some deb packages because i 
don't use ubuntu.  I would say that compiling the sources with the proposed 
modification and compiling restricted drivers works, but this is not for 
novices.

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toshiba p100 series dsdt acpi error no sound, works with acpi turned off.
https://bugs.launchpad.net/bugs/136469
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