If you’ve installed your operation systems correctly, then both Windows and Ubuntu will support the stand-by and hibernation functions.
In the latest Ubuntu (12.04, Precise Pangolin) you have to enable hibernation manually.
- To test whether hibernation is working, open a Terminal and run the following command:
- If Ubuntu powered down and on restart resumed the previous state correctly, then hibernation works. When Ubuntu prepares hibernation it may display error massages (like bluetooth, rt2800pci – wifi) for a short time, but it’s all good as long as it restarts properly.
- Open a Terminal and execute the following command:
sudo gedit /etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla
- Paste this text into the file:
[Re-enable hibernate by default]
- Save the file and close gedit.
- After reboot, you’ll be able to use the hibernate option from the system menu.