Lenovo ThinkPad T420 (English) User Guide - Page 202

ThinkPad NumLock, ThinkPad LCD, NVIDIA Optimus, Display, Enabled, OS Detection for NVIDIA

Page 202 highlights

Table 8. Config menu items (continued) • Off Display Boot Display Device • ThinkPad LCD • Analog (VGA) • Digital on ThinkPad • Digital 1 on dock • Digital 2 on dock Graphics Device • Integrated Graphics • Discrete Graphics • NVIDIA Optimus OS Detection for NVIDIA Optimus • Disabled • Enabled If you select "On", NumLock is always enabled. If you select "Off", NumLock is always disabled. Note: Power-On NumLock will be displayed if you select "Synchronized" at the ThinkPad NumLock. Select the display device that is to be active at boot time. This selection is effective for boot time, password prompt, and ThinkPad Setup. "Digital on Thinkpad" is DisplayPort on your computer. "Digial 1 on dock" and "Digital 2 on dock" are DisplayPort or DVI on docking station. Integrated Graphics will achieve longer battery life, and Discrete Graphics enhances performance. NVIDIA Optimus runs as Integrated Graphics mode and Discrete Graphics is enabled on demand. Note: NVIDIA Optimus mode should only be selected if you are using a Windows 7 model. System BIOS automatically switches Graphics device setting to NVIDIA Optimus mode if the OS supports the feature, and to Discrete Graphics if the OS does not support it. 184 User Guide

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Table 8. Config menu items (continued)
Off
If you select “On”,
NumLock is always
enabled.
If you select “Off”,
NumLock is always
disabled.
Note:
Power-On NumLock
will be displayed if you
select “Synchronized” at
the
ThinkPad NumLock
.
Boot Display Device
ThinkPad LCD
Analog (VGA)
Digital on ThinkPad
Digital 1 on dock
Digital 2 on dock
Select the display device
that is to be active at boot
time.
This selection is
effective for boot time,
password prompt, and
ThinkPad Setup.
“Digital on Thinkpad”
is DisplayPort on your
computer.
“Digial 1 on dock” and
“Digital 2 on dock” are
DisplayPort or DVI on
docking station.
Graphics Device
Integrated Graphics
Discrete Graphics
NVIDIA Optimus
Integrated Graphics will
achieve longer battery life,
and Discrete Graphics
enhances performance.
NVIDIA Optimus runs as
Integrated Graphics mode
and Discrete Graphics is
enabled on demand.
Note:
NVIDIA Optimus
mode should only be
selected if you are using a
Windows 7 model.
Display
OS Detection for NVIDIA
Optimus
Disabled
Enabled
System BIOS automatically
switches Graphics device
setting to NVIDIA Optimus
mode if the OS supports
the feature, and to Discrete
Graphics if the OS does not
support it.
184
User Guide