Delay between turning on car and PC booting.

**fabworks** · 10-21-2008, 07:21 PM

Has anyone noticed that there is a delay between when you turn on your car and when the carpc starts to boot?

I counted the seconds today right after turning on the car, it took about 5-6 seconds for the CarPC fan to start and the booting process to begin.

Why is this?

**NiSlo** · 10-21-2008, 07:38 PM

What PSU are you using? Most (if not all) are designed that way. Some PSU allow the delay to be user customisable.

**fabworks** · 10-21-2008, 07:40 PM

It's the M2-Atx. It sucks because this adds an additional 5-6 seconds to the boot time.

**Civic Modz** · 10-21-2008, 08:07 PM

Have you tried a program called bootvis. What it does is removes the generic driver delays to reduce your boot up time. The only thing is that you have to run the program again after you install a new device/driver/software. Hop this helps.

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**NiSlo** · 10-21-2008, 08:11 PM

The M2 certainly has the delay by design (I use it and I don't like the the delay either). I believe this is to prevent timing issues with certain boards where they don't boot if there's not enough time between the board receiving power and the power button being pressed.

From the manual

M2-ATX waits for 2-3 seconds then turns on the 5Vsb rail. After another second M2-ATX sends an “ON” signal to the motherboard via the 2 wires connected to the motherboard’s ON/OFF pins. The motherboard will turn ON and your system should start booting.

*edit* and although Bootvis is a handy program and does seem to make a difference, it won't help the OP as he is talking about the delay between turning the key and the m2-atx turning on the machine.

**fabworks** · 10-21-2008, 08:37 PM

Well, if it's done by design, there is nothing I can do. Do any of you know if the same design carries to the newer power supplies they make?

I use hibernation, I'll see if using Bootvis makes any difference. Any second saved is a difference to me

**Civic Modz** · 10-21-2008, 09:06 PM

I know Bootvis can improve boot times from startup to windows, though im not sure if you will see an improvement after coming out of hibernation.

Since were talking about a bios delay issue, the only thing I can suggest is checking your bios settings. If that doesn't work I wonder if its possible to trick the power supply in giving power to the MB before the MB requests it. I suppose you would have to fully understand the system before attempting this. Also there must be a valid reason why there are these delays in the first place!

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**nobb** · 10-21-2008, 09:15 PM

I think you can get rid of the delay by reprogramming the pic chip on the M2. I have no idea how to do that though.

**NiSlo** · 10-21-2008, 10:06 PM

Originally Posted by Civic Modz

If that doesn't work I wonder if its possible to trick the power supply in giving power to the MB before the MB requests it.

The motherboard doesn't actually request power, the M2 just gives it power when the M2 gets the ignition signal. It should be providing power to the mainboard before it gives it the instruction to turn on, but that is the reason behind the delay - to make sure the board has full power before trying to boot

Originally Posted by nobb

I think you can get rid of the delay by reprogramming the pic chip on the M2. I have no idea how to do that though.

Some info here. Might be worth pm'ing the OP of that thread.

**fabworks** · 10-21-2008, 11:43 PM

It's possible to have the system turn on by rigging it with the alarm. But by doing so I run the risk of draining the battery in the case that I don't lock the car back up and the system stays running.