Turn Off and Disable Hybrid Sleep in Windows Vista

Hybrid Sleep feature in Windows Vista provides a safeguard for computer system such as desktop PCs and workstations, which does not have backup power supply such as battery, from losing running programs and open files when encountering power blackout while in sleep state. The trade back is that to let computer goes into sleep takes a while longer, as system will save the state of operating system environment into memory as well as hibernation file (hiberfil.sys) as in the process of hibernating so that unsaved data won’t disappeared if power is cut.

However, for users who has UPS, or using laptop or notebook computer which has batteries to fall back on power outage, Hybrid Sleep is not necessary, as most system with backup power is configured to shutdown automatically or goes into hibernation when the battery charge level falls below certain critical level. Thus, the Hybrid Sleep is not necessary needed for such system to speed up and reduce the time system used to go into sleep state. If your system has a lag or delay before sleeping (such as when closing the lid of laptop), try to disable Hybrid Sleep to see the sleep performance is improved.

1. Click on Start button, then go to Control Panel.
2. Click on System and Maintenance link, then click on Power Options to run the applet.
3. Under the “Select a power plan” page, and the “Preferred plans” section, click on Change plan settings under the active selected power plan, i.e. the one which are ticked.

   

4. On the “Change settings for the plan” page, click on Change advanced power settings.

   

5. On the “Advanced settings” tab of “Power Options”, expand Sleep tree, then expand Allow hybrid sleep subtree.
6. Depending on your computer power configuration, you will see different options available:

   For desktop computer relying on AC power, select On from the drop-down list of “Settings” option. On this system on direct current, it’s best to use Hybrid Sleep to ensure that system state is intact when memory is losing power.

   For notebook and laptop computer or probably those on UPS, there are 2 settings available - “On battery” and “Plugged in”. Select Off from the drop-down list as the value for both options.

   

7. Click on bottom “OK” button when done.
8. Click “Save changes” if the button is not grayed out.

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This entry was posted on Monday, October 29th, 2007 at 11:41 pm and is filed under Windows Vista. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.