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YKQian
Paper Tape
Posts: 4
Registered: ‎01-17-2020
Location: US
Views: 231
Message 1 of 8

Yoga C940 15" keyboard, power button and lid cannot wake up device

The following are attempted solutions that do not work:

 

"Run PowerShell / Command Prompt as Administrator" and execute

powercfg -deviceenablewake "<device name>"

It says I have no permission.

 

❌ "Super Administrator" account. Same result.

 

❌ Updated drivers of as many devices as I can. Updated UEFI.

 

❌ Updated Windows.

 

❌ Tried this. Still did not work.

 

I have checked the devices that can be set to wake up the computer by executing

powercfg -devicequery wake_programmable

and it only showed the Wi-Fi adapter and the fingerprint reader. No keyboard, mouse, touchpad, lid, USB or Bluetooth.

 

At this point, I am inclined to believe something is wrong with the UEFI.

Support Specialist
Posts: 881
Registered: ‎08-02-2018
Location: US
Views: 206
Message 2 of 8

Re: Yoga C940 15" keyboard, power button and lid cannot wake up device

Hi @YKQian,

 

Welcome to the Community Forums.

 

We would like to learn more about the issue. How do you put the laptop in sleep mode? Were you able to wake up the laptop from sleep using keyboard, power button or lid before? Were there any changes or updates prior to the issue? 

 

Kindly check if the keyboard was set to wake up the computer from sleep in device manager. 

 

Device Manager>Keyboards>properties>power management>make sure allow this device to wake the computer has a check

Device maanger.PNG

 

In addition, look at Advanced Power Settings. Open Control Panel, Select Power Options, then select Change Plan Settings, then Change Advanced Power Settings. Look through all the options that can be changed & see if that helps. Don't forget to press the Apply button to save changes.

 

Update us how it goes.

Auxen

 



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YKQian
Paper Tape
Posts: 4
Registered: ‎01-17-2020
Location: US
Views: 200
Message 3 of 8

Re: Yoga C940 15" keyboard, power button and lid cannot wake up device

Auxen,

 

Thanks for your concern. The wake-up problem typically occurs when I close the lid, and try to wake it up afterwards. It does not consistently occur, but when it does, the only solution is to shut it down by long-pressing the power button and turn it on again, which is immensely inconvenient and has caused loss of unsaved work before.

 

I do not remember a clear cutoff at which the problem began to occur. Maybe there were automatic updates or something.

 

There is no "Power Management" tab for most devices in Device Manager. Not the mouse, the keyboard, the lid, the touchpad, or the power button. There does not seem to be a fix, since I have tried everything I can find online.

 

Advanced Power Settings does not have anything related to waking up from hardware.

 

That's all the updates I have so far.

Support Specialist
Posts: 881
Registered: ‎08-02-2018
Location: US
Views: 196
Message 4 of 8

Re: Yoga C940 15" keyboard, power button and lid cannot wake up device

Thanks for getting back to us and we appreciate all the steps that you've tried.

 

Try uninstalling and reinstalling the display adapter and turn off the fast start up

 

If still does the same, then we suggest to back up your data and reset the laptop to its factory settings. 

 

Follow the steps here to reset the laptop.

 

Update us how it goes.

Auxen



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liopag2
Punch Card
Posts: 92
Registered: ‎12-08-2019
Location: US
Views: 176
Message 5 of 8

Re: Yoga C940 15" keyboard, power button and lid cannot wake up device

Did you upgrade to Windows 1909 after the issue of not wanting to wake from sleep started to occur? This glitch happened even when I was on Windows 1909, and re-installing it to keep my files did the trick. Resets did not work (resetting from settings) but if it were my exact case a reset + download 1909 from Microsoft's site should also work.
YKQian
Paper Tape
Posts: 4
Registered: ‎01-17-2020
Location: US
Views: 158
Message 6 of 8

Re: Yoga C940 15" keyboard, power button and lid cannot wake up device

Auxen,

I reinstalled the display adapters and turned off fast startup as you suggested. The problem has not reoccurred so far.

Thanks!
YKQian
Paper Tape
Posts: 4
Registered: ‎01-17-2020
Location: US
Views: 156
Message 7 of 8

Re: Yoga C940 15" keyboard, power button and lid cannot wake up device


@liopag2 wrote:
Did you upgrade to Windows 1909 after the issue of not wanting to wake from sleep started to occur? This glitch happened even when I was on Windows 1909, and re-installing it to keep my files did the trick. Resets did not work (resetting from settings) but if it were my exact case a reset + download 1909 from Microsoft's site should also work.

The problem appeared some time after I updated the system to 1909. So far Auxen's solution seems to work, and I might try resetting if the problem reappears.

liopag2
Punch Card
Posts: 92
Registered: ‎12-08-2019
Location: US
Views: 147
Message 8 of 8

Re: Yoga C940 15" keyboard, power button and lid cannot wake up device

I see, good to hear. Didn't try reinstalling display adapters for when that glitch started happening on my end but will definitely give a try and see if it happens again.

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