hi there!
I'm currently using the 2.6 kernel (previously used 2.4) but cant get ACPI to work on my laptop(no matter what the kernel is).
It has ACPI support(works on windows), but in linux i can only get apm to work.
This laptop has SiS hardware everywhere :/
here is some of the lspci output:
00:00.0 Host bridge: Silicon Integrated Systems [SiS] 630 Host (rev 31)
00:00.1 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev d0)
00:01.0 ISA bridge: Silicon Integrated Systems [SiS] 85C503/5513

i've compiled acpi support in the kernel, and i'm using acpid. using dmesg i found out this:

root@tuggy:/home/nuno# dmesg | grep -i acpi
ACPI disabled because your bios is from 97 and too old
You can enable it with acpi=force
ACPI: RSDP (v000 OID_00 ) @ 0x000e4010
ACPI: Subsystem revision 20031002
ACPI: Interpreter disabled.
ACPI: ACPI tables contain no PCI IRQ routing entries
PCI: Invalid ACPI-PCI IRQ routing table

Even after using acpi=force, I get other errors and cant get it to work. ACPId quits with error message saying it cant find /proc/apci/blablabla

Someone told that i should upgrade my bios to a recent version, but i cant find the update anywhere!
Any similiar experiences?