Hi,

Lately I've switched from Mandriva cooker to gentoo2006.0 and in the
same time from a 2.6.14 to a 2.6.15-gentoo kernel.

In mandriva I experienced problems while trying to get acpi functional
on my acer extensa 4102wlmi laptop because of a corrupted DSDT table :
the BIOS returned bad values to the kernel which wouldn't boot if the
acpi=off paramater was not present => I solved the problem overriding
the original DSDT table inserting a corrected one into the initrd image.
But here initrd has been replaced with initramfs and this tip doesn't
apply anymore.
I've patched my gentoo kernel with the
acpi-dsdt-initrd-patches/acpi-dsdt-initrd-v0.8.1-2.6.16.patch from
http://www.gaugusch.at/ and I then get a "kernel panic - not syncing:
VFS: Unable to mount root fs on unknown block ..."
I've also applied the acpi-dsdt-initramfs-fix-2.6.10-cleanup.patch and
I still obtain the same error.

So I gave up and tried the static method :
inserting it directly into the kernel (i've tried a vanilla 2.6.16.18
from kernel.org patched with the acpi patch located at
acpi.sourceforge.net and a gentoo 2.6.16 (latest gentoo unstable)but the
option that I want to use "Insert custom DSDT from file" remains
unavailable : it appears in xconfig if i check the "show all options"
box but i can't use it .

eventually i got a partial acpi support using a tip from a french site
(http://www.linuxfr.org/tips/263.html : modifying manually this file
/usr/src/linux/drivers/acpi/osl.c ) before recompiling the kernel

So, does anyone know how to correctly replace my dsdt table either
statically in the kernel (which i would prefer) or in initramfs ?

Thanks in advance
cedrik

Cedrik ha scritto:

> [...]
> So I gave up and tried the static method :
> inserting it directly into the kernel (i've tried a vanilla 2.6.16.18
> from kernel.org patched with the acpi patch located at
> acpi.sourceforge.net and a gentoo 2.6.16 (latest gentoo unstable)but the
> option that I want to use "Insert custom DSDT from file" remains
> unavailable : it appears in xconfig if i check the "show all options"
> box but i can't use it .

I had the same problem with kernel 2.6.13. The solution is to uncheck
another option in section:

Device Drivers

Generic Driver Options

[ ] Select only drivers that don't need compile-time external
firmware

After unchecking it, the ACPI_CUSTOM_DSDT option was enabled and I
could select a custom DSDT.hex file.

See here for more explanations:
http://acpi.sourceforge.net/wiki/ind...OverrideTables

pasquale a écrit :
> Cedrik ha scritto:
>
>> [...]
>> So I gave up and tried the static method :
>> inserting it directly into the kernel (i've tried a vanilla 2.6.16.18
>> from kernel.org patched with the acpi patch located at
>> acpi.sourceforge.net and a gentoo 2.6.16 (latest gentoo unstable)but the
>> option that I want to use "Insert custom DSDT from file" remains
>> unavailable : it appears in xconfig if i check the "show all options"
>> box but i can't use it .
>
> I had the same problem with kernel 2.6.13. The solution is to uncheck
> another option in section:
>
> Device Drivers
>
> Generic Driver Options
>
> [ ] Select only drivers that don't need compile-time external
> firmware
>
> After unchecking it, the ACPI_CUSTOM_DSDT option was enabled and I
> could select a custom DSDT.hex file.
>
> See here for more explanations:
> http://acpi.sourceforge.net/wiki/ind...OverrideTables
>

Great thanks to you!
I'll try this and i'll let you know when it's done

cedrik