I'm also concerned about power consumption and looking for ways to decrease it.
Majority of smart home community is talking about power usage reductions cause of its "smart" features, but if we put power hungry PCs in them, then it is hard to talk about energy efficiency.
I have put even Mobile procesor in my asus p4p800 e-deluxe board some year or two ago, to minimize consumption, but it didn't help much (that adapter doesn't let voltage scaling of procesor that can now be done on newer processors).
I identify several bigger groups of power hungry details :
- processor by itself in idle mode - majority of "away" state, LMCE will be doing only video surveillance, maybe mythtv record and nothing else. In such state it would be wise to use as little as possible resources... I remember that some kind of voltage/frequency scaling daemons (cpufreqd?) were around to take advantage of newer processors features to cut down power usage to bare minimum for current resource needs. Anyone more familiar if those daemons still exist in some newer form and if they are active by default ?
- disks - we have large spinning disks in Cores. Currently also there is a problem of logs - they are mostly still outputting a lot of informations in them, so logging disk is in constant use. But in my core, I use separate disk with media that could be spinned down during non-media-needed intervals.
Anyone more familiar with spinning disks down etc... ?
- screen saver - we have quite CPU intensive screen saver, that doesn't do its job by definition (screen & power saver? ). Maybe it could be activated only during idle in one of "home" modes and not when in "away" mode, cause at that time nobody is at home...
I have a energy consumption meter, but older HW, so cannot do usefull measurements, but would be more than happy if we can start new page on Wiki about this problem and post solutions, opinions and findings there ....
Thanks in advance for cooperation,