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Reply With QuoteHibernation doesn't use any power. The computer is fully shut off at that point.
(edit: woot! my 400th post)
Bit of background info on me, currently have a mk4 golf 1.6 16v, i'm young so its all i can afford, currently doing a-levels (from the uk btw) in maths, computing, physics and an AS in electronics which i'm about to start, so i'm up to the carputer scene.
Been reading over the forums for the last few weeks and reading into carputers, but i've got a kind of dilemma which i cant seem to find any real solutions for after searching on the forum:
What i want is when the car is initially turned on, the computer goes into a stanby or hibernate mode, so easy loading when i need it, then there is a button on the dash (replace a dummy button on the dash) which can take it out of hibernate and put it back into hibernate, but only when the car is on.
However when the car is switched off the button boots the carputer from scratch and not into hibernation, and then the switch switches the whole carputer off and not just back into hibernation, and then a way to stop any sort of drain on the battery while its off completely (i know this may be able to be sorted out in the power supply, i think)
Oh and also a feature when the car is off and the system in hibernation. it shuts down fully so i don't end up leaving it on overnight.
Is there anyway to do this? Or anything i can do for it to be possible, like running another car battery in parrallel for example?
Ok so probably over-complicated things there, basically i just want a button to turn it on and off in the car, maybe eliminate loading times when the car is on, but then i want to be able to use it while the car is off. And without the worry of leaving it on and draining my battery.
Might just keep it simple now actually :s
Hibernation doesn't use any power. The computer is fully shut off at that point.
(edit: woot! my 400th post)
Originally Posted by psyrex
If hibernation doesn't use any power then how does it load back into the os so quickly, it has to use some power, if there was no power then all the os already loaded (which causes near instant loading) would be lost as its on ram which is volatile.
Unless i've completely missed the point of something.
Edit: Right just read up on hibernation a bit, and your pretty much right, only the tiniest amount of power can be used which i'm sure wouldn't be enough to kill the battery overnight. But technically it shouldn't use any as the data is saved to the hard disk.
youve missed the point.
standby is stored in RAM. volitile and needs power that is the instant off instant on.
hibernation is slower but still fast because it takes what is in ram, and writed to the harddrive. The harddrive keeps its state even without power. Then on resume from hibernation, it loads it all back into the ram.
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Yeh just read up on that, read the edit in my post
Anyway now i'm cleared up about that, what about a button just to put the computer in hibernate and take it off hibernate whever? And then an automatic hibernate somehow, so when the car is turned off and the computer left on after a certain time it hibernates, but only when the car is off.
Its built into most dc-dc powersupplies. Called a shutdown controlller. And the regular power button can be configured to put it into standby, so solution solved.Yeh just read up on that, read the edit in my post
Anyway now i'm cleared up about that, what about a button just to put the computer in hibernate and take it off hibernate whever? And then an automatic hibernate somehow, so when the car is turned off and the computer left on after a certain time it hibernates, but only when the car is off.
And as for the itny power drawn in hibernation, it is the same tiny power that is always drawn by the motherboard while not completely off. Notice that there is usually an led on your motherboard that is always lit. That there is visual confirmation that there is always a circuit with power as long as the computer has power. Pull the plug and within a few secs, the light goes out.
The "off" state of most electronic devices is not really off. Same reason why your tv can interpret the IR signal when "off". It is because it isnt. Pull the plug and it is off. Same principle. It draws power when "off".
Fusion Brain Version 6 Released!
1.9in x 2.9in -- 47mm x 73mm
30 Digital Outputs -- Directly drive a relay
15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
Buy now in the MP3Car.com Store
Could the shutdown controller put it into hibernate also?
sorry about all the questions
oh and just added a photo in of my car if anyone fancies a gander
It pushed the power the button on your computer automatically. If your power button can do it, then yes it can be done.
Fusion Brain Version 6 Released!
1.9in x 2.9in -- 47mm x 73mm
30 Digital Outputs -- Directly drive a relay
15 Analogue Inputs -- Read sensors like temperature, light, distance, acceleration, and more
Buy now in the MP3Car.com Store
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