A Windows XP help forum. PCbanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » PCbanter forum » Microsoft Windows 7 » Windows 7 Forum
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Network card query



 
 
Thread Tools Rate Thread Display Modes
  #1  
Old February 4th 19, 05:31 PM posted to alt.windows7.general
pjp[_10_]
external usenet poster
 
Posts: 1,183
Default Network card query



Why is it some devices seem to keep network card powered up even when
unit is turned off?

My "smart" Blue-ray player shows up doing an IP scan even though it's
not been turned on in weeks or more. My little netbook's network card
light stays on even when pc is turned off but it doesn't show in the ip
scan. Same thing with two (possibly more) desktops I have. have to
unplug them to make light go out.

Some units clearly go off, e.g. an older XP era laptop seems to turn off
everything and as well a more modern dual-core laptop also. Or at least
all the lights go out.

Is there any setting I should be looking at? When turned off I want the
damn thing to be completely off and not just look like it is.
Ads
  #2  
Old February 4th 19, 05:41 PM posted to alt.windows7.general
Sjouke Burry[_2_]
external usenet poster
 
Posts: 275
Default Network card query

On 4-2-2019 17:31, pjp wrote:


Why is it some devices seem to keep network card powered up even when
unit is turned off?

My "smart" Blue-ray player shows up doing an IP scan even though it's
not been turned on in weeks or more. My little netbook's network card
light stays on even when pc is turned off but it doesn't show in the ip
scan. Same thing with two (possibly more) desktops I have. have to
unplug them to make light go out.

Some units clearly go off, e.g. an older XP era laptop seems to turn off
everything and as well a more modern dual-core laptop also. Or at least
all the lights go out.

Is there any setting I should be looking at? When turned off I want the
damn thing to be completely off and not just look like it is.

Not using w10 maybe?

  #3  
Old February 4th 19, 06:09 PM posted to alt.windows7.general
rp[_2_]
external usenet poster
 
Posts: 36
Default Network card query

On Mon, 4 Feb 2019 12:31:06 -0400, pjp wrote:



Why is it some devices seem to keep network card powered up even when
unit is turned off?

My "smart" Blue-ray player shows up doing an IP scan even though it's
not been turned on in weeks or more. My little netbook's network card
light stays on even when pc is turned off but it doesn't show in the ip
scan. Same thing with two (possibly more) desktops I have. have to
unplug them to make light go out.

Some units clearly go off, e.g. an older XP era laptop seems to turn off
everything and as well a more modern dual-core laptop also. Or at least
all the lights go out.

Is there any setting I should be looking at? When turned off I want the
damn thing to be completely off and not just look like it is.


You could look in the BIOS to see if wake on lan is turned on.

--
Regards - Rodney Pont
The from address exists but is mostly dumped,
please send any emails to the address below
e-mail rpont (at) gmail (dot) com


  #4  
Old February 4th 19, 06:20 PM posted to alt.windows7.general
Paul[_32_]
external usenet poster
 
Posts: 11,873
Default Network card query

pjp wrote:

Why is it some devices seem to keep network card powered up even when
unit is turned off?

My "smart" Blue-ray player shows up doing an IP scan even though it's
not been turned on in weeks or more. My little netbook's network card
light stays on even when pc is turned off but it doesn't show in the ip
scan. Same thing with two (possibly more) desktops I have. have to
unplug them to make light go out.

Some units clearly go off, e.g. an older XP era laptop seems to turn off
everything and as well a more modern dual-core laptop also. Or at least
all the lights go out.

Is there any setting I should be looking at? When turned off I want the
damn thing to be completely off and not just look like it is.


WOL and heartbeat.

A NIC on a motherboard could have access to standby power (+5VSB).
Using Device Manager, check the properties of the NIC and see
if the "Allow this device to turn on computer" or similar is selected.
The combination with such a PME (power management event) bit, plus
a selection of a WOL (Wake On LAN) rule (what flavor of WOL to honor),
a device can keep a link "warm". With the "power off", the device may
still keep the link alive for WOL purposes. Heartbeat is a mechanism
for the PHY on either end, to know a link is present.

The +5VSB available from an always-powered ATX supply, can
supply +3.3V and +1.8V for the NIC chip, to keep it powered.
The Device Manager tick box, is what enables or removes those
two rails when the computer sleeps.

It's possible for any network device now, to have a MAC with
a processor, and do any amount of protocol on its own. For example,
there are Wifi MACs which are allowed to keep a Wifi link active
and operational. Again, for the purposes of supporting WOL over
Wifi. But it would not surprise me if that was extended to
returning a ping. They really should not do that, since ping
is used as a means to sus whether a host CPU is frozen or
operational. A powered off node should not "ping" as that
implies (wrongly) that the host CPU is sane.

If you buy a Business PC with Intel Management Engine, the
Intel NIC provided is a "dual head" unit, that filters traffic
on its own. When the Business PC is crashed (CPU not sane), the
dual head NIC still forwards IME traffic to the management engine,
so the PC can be "tilted upright" by IT staff. You can reset
a PC via management engine packets to the Intel NIC supporting
such activity. You can also wake such a PC that way. Even if
the Business PC is sleeping, it can be awakened remotely.
It doesn't have to be WOL, because one head of the NIC
is always supposed to be online for the purposes of the
management engine interface. If your PC has a RealTek NIC,
chances are it does not have that "Intel supporting feature".

Certain Microsoft Surface products support a newer power
paradigm called S0ix. Perhaps this was called Digital Home
at one time (DH), indicating an "always on" product which
blurs the lines between sleep and running states (but DH would
not have had the advantage of modified ACPI to go with it). The
product may nominally not be drawing power for the CPU,
but any time a hardware interrupt comes in (attempt to ping
NIC, packet now in NIC buffer), the CPU can wake up for a
fraction of a second and process what has happened. This
is a practical concept for battery powered devices (with
silent power converters), but would drive you nuts on
a desktop (as the ATX supply fan would run).

https://www.thurrott.com/mobile/micr...sleep-problems

Whereas a regular PC would have S0, S1, S3, S4, the S0ix
computing device kind of "mashes together" S0 thru S3 into
a state of its own. It means the machine can sleep if it
isn't doing anything. And with out the normal notion of
sleep. (If the computing device is small and portable,
it has NAND flash file storage, battery power, silent
power converters, it can be "very busy" or "sleepy"
without anyone being aware what it's doing. Creepy
almost... The only thing that gives it away is
when it gets warm, or a fan comes on because too
much CPU is being used for passive cooling to work.)

Devices like that should really have a LED indicating
power state (LED blinks when "busy").

Paul
 




Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off






All times are GMT +1. The time now is 07:32 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 PCbanter.
The comments are property of their posters.