Hi Team
I wonder if its time to revisit ACPI for doing scheduled wakeups. This looks
much more elegant to me,
and seems to have made real progress in 2.6.14 kernels.
This will off course need a Mother board and BIOS that supports the Real Time Clock alarm function
but as this is exposed via the OS, then this looks much safer than poking
directly into NVRAM.
( most BIOS have alarms that go upto 1 month ahead, some older ones also only
have 1 day ahead)!
I am using SUSE 10.0 but would be interested if other distros now have good
ACPI support
Here is a quick link to the ACPI documentation from Novell, and the acpi4linux
home page
http://www.novell.com/documentation/suse10/index.html?page=/documentation/suse10/adminguide/data/sec_pmanage_acpi.html
http://acpi.sourceforge.net/
Here are the results for my system
Read the RTC alarm clock
cat /proc/acpi
cat /proc/acpi/alarm
2005-12-00 10:11:33
Now check we can write a value back into the BIOS
Login as root
#echo 2005-12-31 10:30:00 >/proc/acpi/alarm
Now check it worked
#cat /proc/acpi
2005-12-31 10:30:00
#shutdown -h now
Note you will NOT see this change the wake up time in the BIOS
And wait for the system to spin up.
Now going away to see how to integrate to Myth
Mike C
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