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CM15 Power Management


Page no: CM15

 

 

Explanation
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Hibernation

Hiberfil.sys

Hibernation takes too much space. On my machine with 32 GB memory, it takes 17.9GB.

The Hiberfil.sys is a hidden system file located in the root folder of the drive where Windows is installed. The Windows Kernel Power Manager creates this file when you install Windows. The size of this file is approximately equal to how much Random Access Memory (RAM) is installed on the computer.

The computer uses the Hiberfil.sys file to store a copy of the system memory on the hard disk when hibernation is turned on. If this file is not present, the computer cannot go into hibernation.

Turn Hibernation off

To delete the Hiberfil.sys file and make hibernation unavailable, follow these steps:

  1. Click Start, and then type cmd in the Start Search box.
  2. In the search results list, right-click Command Prompt, and then click Run as Administrator.
  3. If you are prompted by User Account Control, click Continue.
  4. At the Command Prompt, type powercfg.exe /hibernate off, and then press ENTER.
  5. Type exit and then press ENTER to close the Command Prompt window

Turn Hibernation on

To recreate the Hiberfil.sys file and make hibernation available, follow these steps:

  1. Click Start, and then type cmd in the Start Search box.
  2. In the search results list, right-click Command Prompt, and then click Run as Administrator.
  3. If you are prompted by User Account Control, click Continue.

(source)

 

Hibernation Button

Hibernation Button in Start Menu

Start Menu has Hibernation Button

 

 

Hybrid Sleep

Step A) Turn Hybrid Sleep Off.

Make sure that hybrid sleep

1. Open Power Options from Control Panel or by using powercfg.cpl command in RUN dialog box or enter via Control Panel –> Hardware and Sound

2. Now click on “Change when the computer sleeps” link present in left sidebar.

 

3. Now click on “Change advanced power settings” link and expand “Sleep” setting and set “Allow hybrid sleep” option to Off.

4. Apply changes and restart your computer. It’ll fix the problem.

Hibernation Button

Step B: Enable Hibernate Button

  1. Click on “Start button -> All Programs -> Accessories“. Right-click on “Command Prompt” and select “Run As Administrator“. If you are prompted to enter password, enter the password and continue. You can also open Command Prompt in Administrator mode by typing “cmd” in Start Menu Search box and press “Ctrl+Shift+Enter“.
  2.  Now provide any of following commands:

powercfg /hibernate on
powercfg -h on

from CM19

3. Exit command prompt and Hibernate option should appear in Start Menu.

So next time when you run Disk Cleanup, make sure to uncheck the option to clear hibernate files otherwise it’ll again disable the hibernate feature in Windows and you’ll not get the option in Start Menu.

 

 

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