Linux/Opus/sleep(or shutdown)

**nasa** · 02-24-2007, 10:18 PM

Hi,

I was wondering... How are people using thier DC-DC power supplies to put linux asleep or shutdown? I looked for an acpi event corresponding to something from my opus -- but didn't see a thing. I am sure I am lost and googling doesn't result in much. So any hints would be appreciated.

Nasa

**dupa2** · 02-24-2007, 10:32 PM

acpid handles everything, once it receives the signal from PS, it shuts down the system, you don't even need any special configuration for it.

**nasa** · 02-24-2007, 10:54 PM

hmmm...,

When I try it, all that happens is linux sits there (all dumb and happy) for about 90 seconds and then the PS kills all power. I don't see it going through the shutdown steps at all... I know I *%@$ something up...

Nasa

**dupa2** · 02-25-2007, 04:58 PM

do you have "power button" actually connected to your PS? , try to install a switch and see if it'll work, your PS not necessarily sends the pulse for shutdown, the switch would easily show where the problem is. Make sure acpi daemon loads and keeps running too.

**nasa** · 02-25-2007, 05:00 PM

Ok,

I did some more testing...

doing "cat /proc/acpi/event" doesn't show anything when I kill the power to ACC line. Nor do I see anything on the acpi line in /proc/interrupts. What could keep the signal from getting to ACPI?

BTW: the computer will shutdown after the allotted time, so the DC-DC power supply is getting the message.

**nasa** · 02-26-2007, 11:48 AM

dupa2:

I just noticed your suggestion of running a switch.... Exactly what are you suggesting? Right now I am testing the system on my bench. I have the a switch on the ACC line so I can simulate what happens in the car. That's how I noticed the problem....

Nasa

**nasa** · 02-27-2007, 09:15 AM

Bump....

**nasa** · 02-28-2007, 06:30 AM

So,

no other linux users are having problems with ACPI? I know I can be cursed, but usually someone else is cursed with me....

Nasa

**dupa2** · 02-28-2007, 01:34 PM

do you have acpi support in kernel? you need it (with "button" property enabled)

eventually you have to load acpi module with parameters to get it to work, and test it with power switch as you have it connected.