Toshiba Satellite P870 - Manual (Page 59)

2. Then uninstall “Intel® HD Graphics Driver”.
Intel ® Display Power Saving Technology
Intel GPU model may include the Display Power Saving Technology
feature that can save the computer's power consumption by optimizing
picture contrast on the internal LCD.
This feature can be used if the computer is:
running under battery mode
using the internal LCD display only
The Display Power Saving Technology feature is enabled at factory default.
If you want to disable the feature, you can disable it.
The Display Power Saving Technology feature can be disabled in the Intel ®
Graphics and Media Control Panel.
You can access this control panel in the following way:
Right-click on the desktop and click Graphics Properties....
In this control panel:
1.
Click Power.
2. Select On battery from the drop-down menu in Power Source.
3. Clear the Display Power Saving Technology check box.
4. Click OK.
If you want to enable this feature, under the conditions mentioned above,
select the Display Power Saving Technology check box.
Monitoring of power condition
Power conditions
The computer's operating capability and battery charge status are affected
by different power conditions, including whether an AC adaptor is
connected and what the charge level is for that battery.
The LED in the table below refers to the DC IN/Battery indicator.
User's Manual 3-19