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Phylum
Token Ring
Posts: 79
Registered: ‎06-02-2014
Location: US
Views: 705
Message 1 of 4

ThinkPads Power Management Options on Wireless Adapters

When configuring the Power Management options on an adapter, be it wired or wireless, there are traditionally three checkboxes available:

          Allow the computer to turn off this device to save power
          Allow this device to wake the computer
                    Only allow a magic packet to wake the computer

  

On the older hardware, all three checkboxes are present and all three can be configured.

  • T440s with 7260
  • T450s with 7265
  • X1 Carbon 2nd Gen with 7260

 

On the newer hardware however, only the first two checkboxes are present and only the first can be checked; the second is completely grayed out.

  • T460s with 8260
  • T470s with 8265
  • X1 Carbon with 8260

 

This isn't some visual glitch or odd GUI limitation:

  1. We've tried toggling this via WMI but it just won't take.
  2. Even powercfg confirms the newer NIC's are not user-configuratble to wake the system from a sleep state.

 

All machines are fully up to date from TVSU and we even pulled not just the drivers but also the Intel PROset suite directly from the Intel site but that didn't change anything.

 

That said, all of this almost looks like a 'regression', but the root cause is not known:

  • firmware - BIOS
  • hardware - architectual change in the wireless adapter itself
  • software - wireless adapter drivers; the OS (Windows 10)
  • something different altogether

 

So why are we missing an option and why is the second option grayed out?

  • Is this an intentional change and if so where from: Lenovo or Intel?
  • If it's not an intentional change and it should work 'as expected', what are the next steps?
Lenovo Employee rbkirk
Lenovo Employee
Posts: 810
Registered: ‎02-20-2009
Location: US
Views: 635
Message 2 of 4

Re: ThinkPads Power Management Options on Wireless Adapters

How do you expect to use the wireless adapter to wake the system if it is asleep...? That assumes a disconnected (not wired) computer, monitoring "the airwaves" for information directing it to wake. While it is in a suspended state...with the wifi card off...

 

Note that WIRED WOL capabilities are still part of the machine...if you allow it.

 

Waking a system from a sleep state is possible if you have full Intel AMT capabilities for Wake via wireless properly configured on an AMT aware management console AND the system....a rare deployment situation. And rather tricky to configure. VERY tricky.

Phylum
Token Ring
Posts: 79
Registered: ‎06-02-2014
Location: US
Views: 610
Message 3 of 4

Re: ThinkPads Power Management Options on Wireless Adapters

Hey rbkirk and thanks for the response.

 

Your response, while greatly appreciated, doesn't answer the core questions:

  • Why are we missing the 'Only allow a magic packet to wake the computer' option altogether?
  • Why is the 'Allow this device to wake the computer' option present but grayed out?
  • Is this an intentional change and if so where from: Lenovo or Intel?
  • If it's not an intentional change and it should work 'as expected', what are the next steps?

However you have a solid a golden nugget in there: Are you suggesting that WoWLAN is *only* (i.e.: exclusively) supported in environments where AMT is enabled & configured specifically for Wake on Wireless LAN?

 

"How do you expect to use the wireless adapter to wake the system if it is asleep..."

Not having used/tested this before, it seems like a real thing:


 But I just want to be clear: My goal is to understand why the Power Management options are different.

I'm not here to focus on what's involved to get WoWLAN setup & working; that might be a separate thread.

 

Many thanks again.

ppp656
Punch Card
Posts: 5
Registered: ‎04-05-2016
Location: US
Views: 363
Message 4 of 4

Re: ThinkPads Power Management Options on Wireless Adapters

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