Wake up timers: Generic question

Will wake up timers bring a system to life after it's entered
hibernation and/or hybrid sleep?

In this case, I'm thinking about backup software that claims to use wake
up timers.

--
Ken
MacOS 10.14.5
Firefox 67.0.4
Thunderbird 60.7
"My brain is like lightning, a quick flash
and it's gone!"

Ken Springer wrote:
Will wake up timers bring a system to life after it's entered
hibernation and/or hybrid sleep?

In this case, I'm thinking about backup software that claims to use wake
up timers.


Why would they put in all that elaborate crap, unless it worked ? :-)

Waking from S3 (Sleep, Hybrid Sleep) or S4 (Hibernate), should
be relatively easy.

I think some older systems didn't like to wake from S5 (soft off)
for unknown reasons. I would expect a modern system to support
this. In S5, the +5VSB is still powered, and the "alarm register"
in the RTC, provides a means to generate a wake event.

Some wake sources can be gated off via Device Manager settings.
For example, I disabled both mouse and keyboard wake on one
OS install on the Test Machine, such that only the power button
on the front wakes it from sleep. I don't think the RTC timer
is in Device Manager, and it could be managed via an ACPI
object.

The powercfg command may give more info. It has a ton of options.
Enough options, you could Google for example usage.

powercfg -a
powercfg /waketimers

I can't get any good pictures out of my Win10 VM because
practically all that stuff is shut off in a VM.

HTH,
Paul

On 6/20/19 5:06 PM, Paul wrote:
Ken Springer wrote:
Will wake up timers bring a system to life after it's entered
hibernation and/or hybrid sleep?

In this case, I'm thinking about backup software that claims to use wake
up timers.


Why would they put in all that elaborate crap, unless it worked ? :-)

Well, that's it. Sometimes it doesn't work. LOL

I've been testing free versions of backup software that I think would be
suitable for newbies. Macrium is definitely not one. G

I've come across a couple programs that say they use wake up timers, but
I've not been able to verify they actually do. At the same time, my
paid version of Macrium does work, but that doesn't mean Macrium isn't
using their own coding to wake the computer.

snip

Some wake sources can be gated off via Device Manager settings.
For example, I disabled both mouse and keyboard wake on one
OS install on the Test Machine, such that only the power button
on the front wakes it from sleep. I don't think the RTC timer
is in Device Manager, and it could be managed via an ACPI
object.

Since this is for newbies, as is most of the things I recommend, I don't
go to this length to make things work or not work. The newbie needs to
be able to grasp, at least basically, what I am doing or have done.

The powercfg command may give more info. It has a ton of options.
Enough options, you could Google for example usage.

powercfg -a
powercfg /waketimers

I can't get any good pictures out of my Win10 VM because
practically all that stuff is shut off in a VM.

When I have the issue of getting a screenshot, I'll run Teamviewer, and
take the screenshot on the "other end", G


--
Ken
MacOS 10.14.5
Firefox 67.0.4
Thunderbird 60.7
"My brain is like lightning, a quick flash
and it's gone!"