Lenovo IdeaPad U455 Lenovo IdeaPad U455 User Guide V1.0 - Page 60

Troubleshooting, Problems with GPU switching, When I slide the GPU

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Chapter 5. Troubleshooting My screen goes blank while • Your screen saver or power management may be the computer is on. enabled. Do one of the following to exit from the screen saver or to resume from sleep or hibernation mode: - Touch the touchpad. - Press any key on the keyboard. - Press the power button. - Press Fn+F2 to confirm whether the LCD screen has been turned off. Problems with GPU switching The system does not respond when I slide the GPU switch. • Make sure switchable graphics feature is enabled in BIOS setup utility. • Make sure the driver for switchable graphics is properly installed. • Make sure you are under Windows operating system when sliding the GPU switch. When I slide the GPU switch, a warning dialog box pops up. • Close all running applications and try again. If you are performing GPU switch while a game application is running, quit the game and try again. • If this happens when your computer is connected with an external display and the external display is active, switch the display device back to the LCD screen on your computer and then try again. 46

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46
Chapter 5. Troubleshooting
My screen goes blank while
the computer is on.
•
Your screen saver or power management may be
enabled. Do one of the following to exit from the
screen saver or to resume from sleep or hibernation
mode:
-
Touch the touchpad.
-
Press any key on the keyboard.
-
Press the power button.
- Press
Fn
+
F2
to confirm whether the LCD screen
has been turned off.
Problems with GPU switching
The system does not
respond when I slide the
GPU switch.
•
Make sure switchable graphics feature is enabled in
BIOS setup utility.
•
Make sure the driver for switchable graphics is
properly installed.
•
Make sure you are under Windows operating system
when sliding the GPU switch.
When I slide the GPU
switch, a warning dialog
box pops up.
•
Close all running applications and try again. If you
are performing GPU switch while a game
application is running, quit the game and try again.
•
If this happens when your computer is connected
with an external display and the external display is
active, switch the display device back to the LCD
screen on your computer and then try again.