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

T500 - Unable to use switchable graphic card feature after updating Win 7 SP1 patch

Question

After manually installing SP1 patch via MS website, I am unable to switch graphic card from ATi to Intel GPU. BIOS has been set to switchable graphic card mode.

Answer

Issue solved after upgrading Power Manager driver to 3.45 and above.

 

Download Link here.

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