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ThinkPad NotebooksThinkPad T400 / T500 and newer T series Laptops Knowledge Base

T510 (Nvidia Optimus & Intel GPU) - When on Intel GPU, contrast is randomly changing

Question

When using battery and system is running on the Intel GPU. The contrast is randomly changing.

Answer

Issue is solved by updating the Nvidia Optimus with Intel GPU driver.

 

Nvidia Optimus Driver for Windows 7 (32-bit)

 

Nvidia Optimus Driver for Windows 7 (64-bit)

 

--------------------------------------------------------------------------------
CHANGES IN THIS RELEASE
Versions 8.17.12.5738 (NVIDIA driver)
8.15.10.2253 (Intel driver)

[Problem fixes]
- Fixed an issue where the screen's contrast ratio might randomly change when
powered by the battery.


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