[Lvlug] 16 seconds from power up to operational system!!!

[Tom Garland]

JR Namida wrote:
> 
> --- On Thu, 8/20/09, Tom Garland <tom.garland at gmail.com> wrote:
> 
>> From: Tom Garland <tom.garland at gmail.com>
>> Subject: [Lvlug] 16 seconds from power up to operational system!!!
>> To: "The Las Vegas Linux Users Group" <lvlug at lvlug.org>
>> Date: Thursday, August 20, 2009, 10:43 PM
>> When playing around with 'Suspend'
>> and 'Hibernate' I noticed
>> that both them powered down my desktop system. :-(
>>
>> After the power on button was pressed, it took a full boot
>> up sequence for an operational system when 'Hibernate' was
>> used.
>>
>> But when I powered up after using 'Suspend' it took 14
>> seconds
>> to get power to the display and 2 seconds later I had my
>> full
>> system back the same as when I did the 'Suspend'. The only
>> issue was that Xchat had disconnected and just doing a
>> re-connect brought it back fine. Everything else was as I
>> left it.
>>
>> So unless I need to do a real reboot to get a updated
>> kernel
>> I'm sticking with doing a suspend from now on. I know that
>> work is being done to dynamically load a new kernel. But
>> until then I'll re-boot only when I'm updating a kernel.
>>
>> Tom
>> -- 
>> 'Intellectual Property'. Intellect is virtual. Property is
>> real.
>> 'Virtual Reality' Duh!���Have Fun and Be
>> Helpful - Toga
>> #LVLUG on IRC.FREENODE.NET for online chat.
>> _______________________________________________
>> Sent via the Lvlug mailing list Lvlug at lvlug.org
> 
> * * *
> Tom,  
> 
> How much power is the system consuming "measured at the wall plug" in suspend?  Wondering if 14 seconds in comparison to starting your system several hours later is economical?
> 
> JR

Well of course you made me power down to get the measurements
you asked for! ;-)

Pulled the plug to add my KillaWatt meter and got:
Full pwr down -  10 Watt        5 VA (Volt Amp, true power use)
Full pwr up   - 195 Watt(avg) 120 VA
Suspended     -  16 Watt        8 VA
(Text above only lines up if you use fixed fonts.)

So I'm adding 3 watts true power usage compared with full
power down and suspend mode. Of course that is not counting
all my other devices. Your mileage will very on how you handle
a power down.

I average having my system up 16 hours a day, even when I went
out for an hour or two because of the reboot PITA factor. Now
I'm going to use suspend when I leave my system for a hour or
more.

So it costs me 24 watt hours a night to use suspend, but I save
112 watts/hour when I leave my computer in suspend compared
to just leaving my system running. Using 168 watt hours a
week with suspend at night I save money when I'm away from
my system for 1.5 hours a week (168/112) using suspend. I'm
sure I get more savings then this because my monitor goes
into standby also for both power down and suspend, 60W/2W.
182/170=1.07 hours counting the monitor.

I also get the joy of a quick return of my system as I left it.

Tom
-- 
'Intellectual Property'. Intellect is virtual. Property is real.
'Virtual Reality' Duh!   Have Fun and Be Helpful - Toga
#LVLUG on IRC.FREENODE.NET for online chat.