YOGA 11S/13 upgrade Windows 8.1 tablet mode card

Knowledge point analysis:
After upgrading Windows 8.1 system, tablet mode operation is very card.
Operation steps:
Under the shutdown state, click the small button that is recessed on the left side of the power-on button (you can find a pen to go to the point).

Select BIOS Setup option, click Enter;

Select Configuration option after entering BIOS, click DPTF, default is Enabled option, click Enter, switch to Disabled, then FN+F10 Save and exit.

Cause analysis: DPTF is a kind of INTEL dynamic energy-saving technology. Lenovo Yoga13 and Yoga11s have this function. There is a switch design under the BIOS. When turned on, the computer is in the three modes of tablet mode, tent mode and standing mode. Energy saving can be achieved.