If you’re using Windows Vista, you can disable hybrid sleep mode so that your computer doesn’t go to sleep while it’s in use. This feature is available under the “System” tab in the Control Panel. To disable hybrid sleep mode, follow these steps:

  1. Open the Control Panel and click on the “System” tab.
  2. In the “System” section, click on the “Advanced System Settings” button.
  3. In the “Advanced System Settings” section, click on the “Hybrid Sleep Mode” button.
  4. If you’re using a laptop or a desktop computer, you may need to change some of the settings to enable hybrid sleep mode. For example, if you’re using a laptop, you may need to change the “Use current time zone” setting to yes so that your computer goes to bed at night according to your time zone. If you’re using a desktop computer, you may need to change the “Use battery power only when needed” setting to yes so that your computer doesn’t go to bed unless it needs power (for example, if it’s connected to an AC outlet).

Windows used to have a fairly simple hardware suspend command called “standby”.  However, this operation took a while to execute (both entering and exiting standby) and it was somewhat unreliable when performed repeatedly, on certain hardware or with certain applications running.  Sleep is meant to alleviate these problems by just serializing the current state into memory and then shutting down all devices other than the RAM.  With the OS state simmering in memory like that, entering and exiting sleep is nearly instantaneous.  However, the dark side to all this is if there is a power outage while the computer is in sleep, all of the unsaved data is lost (since it just existed in memory).  That’s where hybrid sleep comes in.

Hybrid sleep saves the OS state into RAM, but it also writes it all to the hard drive as well (sort of like hibernate does).  This ensures that even if power is lost, the data will remain.  This all sounds like a good idea, but in practice it’s just as slow as standby was.

Now, laptops have batteries and most of them are configured to enter hibernate when the battery dips below a certain level.  This means that unless the battery is physically removed, power to the RAM is never unexpectedly cut.  Thus, we don’t really need the hybrid sleep feature.  Unfortunately, giving hybrid sleep the pink slip is a little harder than it could be.

Step one, open up the power options setting from the control panel and select the “Change plan settings” link below the selected power plan.

Once in the resulting dialog, choose “Change advanced power settings”.  Now you need to scroll through the miles and miles of options to find the “Sleep” node.  Expand this, and then the “Allow hybrid sleep” node below it.  You should see two options, “On battery” and “Plugged in”.  Set both of these to “Off”.

Once this is done, click “OK” and you should be all set!  From now on, whenever your laptop would normally go into “Sleep” – usually when the lid is closed or when inactive for a certain time – it will enter full sleep mode, rather than hybrid sleep.  And when you go to awaken it from its slumbers, it should be fully responsive within a second or two of reactivation – as opposed to the 10-15 seconds after hybrid sleep.