Wakeup from hibernation (1 Viewer)

[Spooky]

I've a technical question about how a Computer can be waked up from hibernation by itself (other than manually set an alarm time or with WOL).
What exactly does a plugin like PowerScheduler to make this happen..? What are the technical background etc. (something with ACPI I guess?).

 

[hwahrmann]

Hi Spooky,

yes, it has to do with ACPI.
A PC can be in S3 (Standby) or S4 (Hibernate).
.NET programs may use something like a WaitableTimer.
This is what Powerscheduler is doing, to set a specific time, when the pc should come up again.

regards,

Helmut

 

[tklon]

... or with WOL.

WOL doesn't work with my htpc when it is in hibernation. Is it possible that I can change that with a bios setting or something else?

 

[Spooky]

hwahrmann: ok, but where exactly is powerscheduler setting the wakeup time? Is it some part of the BIOS, which is writeable from out the OS or something?

tklon: hm... I think my HTPC wakes up with WOL even in hibernation, but I am not sure though. I wouldn't know any BIOS setting for that anyway.

 

[hwahrmann]

Hi Spooky,

it interogates with the computers RTC (Real Time Clock), which signals an interupt to wake up the PC.
see: http://de.wikipedia.org/wiki/Echtzeituhr for a description of rtc.

regards,

Helmut

 

[tklon]

I think my HTPC wakes up with WOL even in hibernation, but I am not sure though.

Hi Spooky, could you please test that and post your result here. Thank you.

 

[hwahrmann]

hi tklon,

even with my PC completely shutdown, i can do a WOL.
Don't need to be in hibernate or standby for that.
if your BIOS and NIC support WOL you should be able to turn on the pc without any problems.

regards,

Helmut

 

[tklon]

WOL doesn't work for me only when the pc is in hibernation. I know how it works because I use it already since the first days of my htpc.

Have a look here (post from Jan 31, 2005):
https://forum.team-mediaportal.com/viewtopic.php?t=4219

 

[Spooky]

I think my HTPC wakes up with WOL even in hibernation, but I am not sure though.

Hi Spooky, could you please test that and post your result here. Thank you.

I'll do that when I get home next weekend I hope I don't forget..

 

[Spooky]

Well, look at that... completely forgot. Anyway, you were right, I can't wakeup the HTPC from hibernation with WOL.