3.8.4 Large memory and auto power-off
Edit /etc/lilo.conf as follows to set boot-prompt parameters for
large memory (for 2.2 kernels) and auto power-off (for APM):
append="mem=128M apm=on apm=power-off noapic"
Run lilo to install these settings. apm=power-off is
needed for a SMP kernel and noapic is needed to avoid problems for
my buggy SMP hardware. The same can be done directly by entering options at
the boot prompt. See
Other boot tricks
with the boot prompt, Section 8.1.5.
If APM is compiled as a module, as in Debian default 2.4 kernels, run
insmod apm power_off=1 after boot or set /etc/modules
by:
# echo "apm power_off=1" >>/etc/modules
Alternatively, compiling ACPI support achieves the same goal with newer kernels
and seems to be more SMP-friendly (this requires a newer motherboard). The 2.4
kernel on newer motherboards should detect large memory correctly.
CONFIG_PM=y
CONFIG_ACPI=y
...
CONFIG_ACPI_BUSMGR=m
CONFIG_ACPI_SYS=m
and add the following lines in /etc/modules in this order:
ospm_busmgr
ospm_system
Or recompile the kernel with all of the kernel options above set to
"y". In any case, none of the boot-prompt parameters are needed with
ACPI.
