power to USB stays on during hibernate

ob1 · 12-15-2003, 08:18 AM

i have an epia m10000 and Opus 90W. When i switch the car off and the PC goes into hibernate mode, the USB devices and the PS2 keyboard all still have power i.e. the optical mouse is still shining, the GPS reciever is still tracking and the num lock light on the KB stays on.

Other people have noticed this as i have seen in the archives, but does anyone KNOW for sure how to get these peripherals to turn off? If i can't find a solution, i will have to install a kill switch on the Opus's power line, but this sort of defeats the purpose of an auto shutdown controller.

Defiler · 12-15-2003, 09:03 AM

Why not run your USB devices through a Hub then put a switch to turn the hub off and on.

Frenchy · 12-15-2003, 09:18 AM

Hibernate ??

Ok, but what are you using ? STR or STD ?

Regards,

Frenchy.

Cinco5 · 12-15-2003, 11:54 AM

I would use a relay to control power to a usb hub, that should kill all of them execpt for the keyboard and mouse.

phc · 12-15-2003, 06:47 PM

I've seen the same thing, but I haven't really paid much attn - too busy sorting out other things. But let me know what you find out, its a pain having to pull the plug each time I shut the car off.

I figured it was a bios setting I didn't do yet, until I find a usb keyboard. Gotta run to frys after work.

ob1 · 12-15-2003, 08:40 PM

Quote: Originally Posted by Frenchy

Hibernate ??

Ok, but what are you using ? STR or STD ?

hibernate=STD, standby=STR.

Quote: Originally Posted by Defiler

Why not run your USB devices through a Hub then put a switch to turn the hub off and on

2 reasons:
1. Many modern powered USB hubs STILL work without the power supply, albeit with a lesser ability to supply current to devices.
2. I dont want to have to use ANY manual switches after paying for such a nice automated startup/shutdown system in the Opus.

I suppose if i COULD find a hub that stops working without external power, i could run it off a PSU controled relay i.e. computer shuts off, relay turns off and USB devices lose power. At least that wouldn't be a manual switch.

mattwz · 12-15-2003, 08:51 PM

I did a quick google search on that, and I found this page.

Quote:

My NUMLOCK LED on my keyboard stays on, even after I have powered the system off.

Check the JKBV jumper and make sure it's set to 2-3.
Click here to see the system board diagram. The JKBV jumper is located next to the ATX power supply connector.

Maybe you can find a jumper on your motherboard similar to this?

CptnDipshit · 12-15-2003, 09:35 PM

If you had a externally powered usb hub you could connect the hub power to a automotive relay and trigger it with one of the molex connectors from your psu.

mattwz · 12-15-2003, 09:55 PM

I have this Belkin USB hub, and it has a switch to change from bus power(power comming from your USB port) or self power(power comming from AC adapter). I put it on self power, and unpluging it and plugging it back in controls weather the devices get power or not. You could plug in to whatever power source gets turned off when your car does. It has a DC in of 7.5V 2.1A, so I guess you would need something to regulate the 12V from the car.

CptnDipshit · 12-15-2003, 10:08 PM

7volts would be close enough just run the + to the 12v on the hdd molex connector and the - to the 5volt

phc · 01-07-2004, 01:08 AM

So what did you end up doing?

S4Per · 04-06-2004, 10:57 AM

I have the exact same thing. It's not the hub - it's the motherboard. I have a Shuttle SB61G2 and called them up. "Why does your motherboard still supply power to the USB bus after the machine is turned off?", Answer: "It uses 5v and that's how we power the internal clock, etc. You'll see that many new motherboards do this". "Can I turn that off?" Answer: "No".

So far, the drain on the battery hasn't been too bad (no starting issues, the car is driven at least every other day, I've had the PC in the car for 2 weeks), but I imagine I'll pay the price in the long run.