ACPI: System description tables not foundI'm n

[mdl313]

Greetings,

Recently installed Gentoo 1.4_rc4 on a desktop PC (MSI KT3 Ultra motherboard) ; all went well, and I'm very pleased with performance. However, I'd like to enable energy saver features (at least monitor shutdown after xxx minutes; system suspend with be good, too; the motherboard supposedly supports both APM and ACPI). I compiled kernel 2.4.21-rc2 with -- I think -- ACPI enabled but APM not. Here's relevant part from .config:
CONFIG_PM=y
CONFIG_ACPI=y
# CONFIG_ACPI_DEBUG is not set
CONFIG_ACPI_BUSMGR=y
CONFIG_ACPI_SYS=y
CONFIG_ACPI_CPU=y
CONFIG_ACPI_BUTTON=y
# CONFIG_ACPI_AC is not set
# CONFIG_ACPI_EC is not set
# CONFIG_ACPI_CMBATT is not set
# CONFIG_ACPI_THERMAL is not set
# CONFIG_APM is not set
Compile seemed to go ok.
However, when attempting to start acpid, I get following error message:
# /etc/init.d/acpid start
* ACPI support has not been compiled into the kernel

dmesg file contains following error messages:
ACPI: System description tables not found
ACPI-0068: *** Error: Acpi_load_tables: Could not get RSDP, AE_ERROR
ACPI-0116: *** Error: Acpi_load_tables: Could not load tables: AE_ERROR
ACPI: System description table load failed

Would appreciate help in understanding the error messages and how to get this running. Do the error messages occur as a consequence of a bad kernel compile, or is something else missing that I have to supply? I believe my BIOS settings are OK

Mark

[snkmoorthy]

There can be couple things wrong here.

1. You didn't put the new acpi enabled in /boot(with /boot mounted)
2. Your BIOS has "ACPI aware OS" turned off
3. Motherboard simply refuses access to ACPI data
4. APIC probably needs to be enabled?

Well the actual error from acpid does make sense - somewhat - depends on what it needs to see for NOT giving the error - my guess is that it looks for /proc/acpi setup - lack of it throws the error.