I'd like to use a linux pc purely to collect rss feeds, but would like to minimise it's power usage as much as possible.
Presumably I would create some kind of cron job to bring it in and out of sleep mode or are there better ways of tackling this?
+4
A:
Set wake up alarm in RTC, then put the computer in standby or suspend(-to-RAM) mode. Some motherboards support waking up from hibernation (suspend-to-disk), but I guess that'll be too slow.
echo `date '+%s' -d '+ 5 minutes'` > /sys/class/rtc/rtc0/wakealarm
echo -n "mem" > /sys/power/state
Replace "mem" with "standby" for stand-by instead of suspend.
BTW. MythTV's wiki has got some more in-depth info end examples. http://www.mythtv.org/wiki/ACPI_Wakeup
vartec
2009-04-07 16:44:49
You could suspend to disk if the power taken to save and suspend is less than the power that would be consumed powering the memory in suspend-to-ram mode.
MarkR
2009-04-08 07:09:48
There are two problems with suspend-to-disk: 1. not all BIOSes support RTC wakeup in hibernation, 2. it means dumping all occupied memory to disk on suspend, and then loading it on wake. That is time and power consuming.
vartec
2009-04-08 07:48:34