Unsoliciited wakeup from hibernation

[Eckhardt Newger]

My PC (with Win XP Pro SP2) is configured for hibernation and WOL. It is
cable-connected to an DSL-router/modem which also acts as DHCP server.

This setup worked fine until I upgraded from SP1 to SP2. Now when the PC is
sent to hibernation it reboots after some seconds. I noticed in the router's
log that the router has sent a DHCP lease (which obviously wakes up the PC)
even though the lease at hibernation time has been issued only some time ago
(still valid more more than 6 days).

AFAIK, it's only the DHCP client (i. e. the PC) that has the active part,
the DHCP server (i.e. the router) just reacts on the PC's DHCP requests.
That would mean that the PC has asked for a new lease or a lease renewal.
Why?

On the other side, the PC stays in hibernation state when I disconnect the
router from the Internet (it immediately reconnects because it's set to
'Autoconnect') shortly before the PC is sent to hibernation.

Can somebody help me figuring out what is wrong here?

Many thanks for any help.

Best Regards

Eckhardt Newger

 

[Jack]

Hi

Hmm… Quite strange. Are you sure that you are talking about Hibernation or
it is a Standby issue?

Disconnecting the Internet should not affect the LAN’s DHCP, the Router
sends DHCP because the computer asks for it (and not vice versa).

WOL needs a specific packet to start a computer (
http://www.ezlan.net/WOL.html ).

I would look over the computer’s BIOS settings concerning LAN boot, Windows
Power settings, and the Router’s settings and make sure that there is No
conflicts in the way it is used.

Jack (MVP-Networking).

 

[Eckhardt Newger]

Hi

Hmm. Quite strange. Are you sure that you are talking about Hibernation
or
it is a Standby issue?

Disconnecting the Internet should not affect the LAN's DHCP, the Router
sends DHCP because the computer asks for it (and not vice versa).

WOL needs a specific packet to start a computer (
http://www.ezlan.net/WOL.html ).

I would look over the computer's BIOS settings concerning LAN boot,
Windows
Power settings, and the Router's settings and make sure that there is No
conflicts in the way it is used.

Jack (MVP-Networking).

Yes, it's hibernation. Be aware things worked under SP1.

What you mentioned is exactly what I have in mind: The DHCP client has the
active part, the DHCP server just reacts. That means that Windows is asking
for a new DHCP lease oe a renewal. Why should Windows (SP2) do that
especially as the lease is still valid? Do you know how I can trace the
situation in order to find out what's going on?

Eckhardt Newger