Lenovo Yoga 13 fixes #11 – Poor performance / CPU throttling in tablet / tent mode

Many people have reported that their Yoga performs poorly and the CPU gets throttled when rotated into tablet/tent mode, causing videos to stutter, etc.  This seems to have become more of an issue after the Windows 8.1 update.

There are two known ways to fix this:

1. Disable the YMC service.  See my post below, fixes #4, for more details on how to do this.  This is my preferred fix, but there is a caveat here – with the YMC service enabled, the trackpad/keyboard disables when the screen is rotated past 180 degrees. Disabling the YMC service will affect this such that the trackpad/keyboard only disables when the screen is rotated a little farther than 270 degrees, perhaps about 300 degrees. This means that tent mode and tablet mode will still behave correctly, because the screen is well past 300 degrees in these modes and thus the trackpad/keyboard properly disables. However stand mode is potentially affected because in that position you may have the screen closer than 300 degrees. If that is problematic for you, use the next option (2) instead.
2. First, try updating the Intel DPTF (Desktop Platform and Thermal Framework) drivers with the latest drivers from the Lenovo website.  If that doesn’t work (which it doesn’t for many), disable DPTF in BIOS.  Enter the BIOS by restarting the machine, and when the very first “Lenovo” screen displays, hit the “F2” key. You can then find the option to disable DPTF. Save changes and exit the BIOS.

EDIT: I changed the above paragraph to reflect new information about the screen rotation needing to pass 300 degrees to disable the trackpad/keyboard, when running with YMC disabled. Thanks to the comments from Katie for this info.