Thread: Help with my intel mini and p1900

When you turned the ignition off did you wait 60 sec for the p1900 to get out of shutdown lockout mode before you turned the ignition on again. If you turn the ignition on while the p1900 is in lockout mode the p1900 will not startup. There is also a bootup lockout that stops the pc from turning off before its fully booted.

Here is some info from the p1900 manual, i thought i had the same problem when i first installed my 1900.

5.2.6 Shutdown Sequence State
At the beginning of this state the SSC issues an ACPI (PWRON) strobe to the motherboard. After the ACPI strobe is sent the SSC enters a Shutdown Lockout time period, in which the SSC prevents the PSU from being turned on again. This is to prevent the SSC from issuing multiple ACPI strobes to the CarPC/Mac motherboard while it is shutting down. The Shutdown Lockout time is the same length as the Bootup Lockout time (approx 60 seconds). After the Shutdown Sequence State, the SSC re-enters the Idle State and waits for the ignition switch to be turned on.

Interesting perhaps that is what happened since I only waited about 15 seconds before turning the car back on. Is there a way to shorten that lockout modE? I had a m2-atx and m1-atx and could shutdown and startup within 10 sec if I wanted to.

You will have to use Uflash to change the settings in the firmware. I was thinking bout doing this and even spoke to Mike H about it but after a while i realised the lockout setting was only a problem while testing out my system, it was never a problem durring regular use.

Originally Posted by Kalt

You will have to use Uflash to change the settings in the firmware. I was thinking bout doing this and even spoke to Mike H about it but after a while i realised the lockout setting was only a problem while testing out my system, it was never a problem durring regular use.

I would concur. It bugged me while I was constantly testing while I reassembled everything, but since it all got back together I only had it happen once (stall and had to turn it off and back on) and I just reached in and woke it up manually.

-dave

Well I tried it today. Counted to 1 1thousand 2 1thousand etc and it turned off roughly at 50. The thing is the fan ran this entire time, mini was sleeping by about 10 1thousand, and after 50 the entire powersupply shutdown, mini light went off, fan stopped on the powersupply. Now when I went to turn the car back on the lcd lit up and the mini did not boot. I waited about 30 seconds and finally pressed the power button on the mini and it loaded into osx. I was able to duplicate this scenario 3 times. Any help would be greatly appreciated.

PS: No usb devices plugged in at all during this testing.

Originally Posted by skippy911

Any help would be greatly appreciated.

Have you double checked your jumper settings? I don't remember for sure, but I think there is one that could cause something like this (though i'm surprised it is sleeping the Mini first).

-dave

Ok I found out it was the jumper set for hibernate now I set it for sleep. The mini went to sleep no problem. I am having a new issue now though, the mini did not survive an engine crank, the p1900 shutoff when I turned on the car. Any ideas?? I triple checked all jumper settings and they are correct now.

Originally Posted by skippy911

Ok I found out it was the jumper set for hibernate now I set it for sleep. The mini went to sleep no problem. I am having a new issue now though, the mini did not survive an engine crank, the p1900 shutoff when I turned on the car. Any ideas?? I triple checked all jumper settings and they are correct now.

Where is the p1900 getting it's juice from? How about it's ignition lead?

It should be connected directly to the battery (I tapped into the power lines for my AMPs). Also make sure you are running good enough cable from the battery to the p1900 (8 gauge should be fine unless you are also power a couple of AMPs off the same line, then you might want to up it to 4 guage to a block and then run 8 from the block to the units).

I hooked my ignition lead to the lead from the bundle that used to be connected to my head unit (was already running wires from there, so it was the simplest).

Also, have you tested your battery? I guess it could be that the strain of cranking is dropping it below the level where the p1900 cuts off to save your battery (but the p1900 itself should still be on and give you a indication with it's LED).

If none of that helps, try the forums on Carnetix's site and/or ping Mike.

-dave