Using Power Saving Modes - Sony PCG-SR33K VAIO User Manual

Using Power Saving Modes

When you use a battery as the source of power for your notebook, you can take advantage of power management
settings to conserve battery life. In addition to the normal operating mode, which allows you to turn off specific
devices, your notebook has two distinct power saving modes: Standby and Hibernate. When using battery power, be
aware that the notebook automatically enters Hibernate mode when the remaining battery charge drops below 5
percent, regardless of the power management setting you select.
If the battery level falls below 10 percent, you should either attach the AC adapter to recharge the battery or
turn off your notebook and insert a fully charged battery.
Normal mode
Normal mode is the normal state of your notebook when it is in use. The power indicator displays green when your
notebook is in this mode. To save power, you can turn off a specific device such as the LCD or the hard disk drive.
See Controlling Power Management
Standby mode
In Standby mode the notebook saves the current state of the system in RAM and switches off power to the CPU.
The amber power indicator flashes in this mode.
To activate Standby mode
1. Press the key combination Fn + Esc.
2. Press any key to return to normal mode.
Hibernate mode
In the Hibernate mode, the state of the system is saved on the hard disk drive and power is turned off. The power
indicator is off in this mode.
To activate Hibernate mode
1. Press the key combination Fn + F12. The "Save to Disk Manager" window appears and the notebook enters
Hibernate mode.
Do not move the notebook until its power indicator turns off.
2. Slide the power switch forward to return to normal mode.
Notes on power saving modes
When returning from Hibernate mode, the system status stored on the hard disk is erased and the notebook
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starts normally if you press the power button and hold it for more than 4 seconds.
Standby uses more power than Hibernate.
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Standby requires less time than Hibernate to return to normal mode.
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If an application exhibits unexpected behavior (such as reduced video quality) after returning from a power
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saving mode, close the application before your notebook enters a power saving mode.
For maximum audio and video performance, use PowerPanel
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Power Management Off profile.
When the internal backup battery is low, it may not boot your system properly. To avoid this condition, follow
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the suggestions below:
Attach the AC adapter and allow the notebook to charge for 1 hour while the power is on. Do not use
o
the notebook during this time. After 1 hour, shut down the notebook and turn it back on.
To fully charge the internal backup battery, leave the AC adapter connected to the notebook and the
o
notebook powered on for more than 24 hours. You can use your notebook while charging the battery.
The operating system may become unstable if a lower power state (such as Hibernate) is initiated and then
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changed before the operating system completely enters the lower power state. To restore the notebook to
its normal operating stability, close all open applications, and slide the power switch forward and hold it there
for 4 seconds or more to completely shut down the notebook.
for details.
to select either the AC Power Profile or the
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