Unit should be shipped with 8.15.10.2342 intel graphics driver, so that the FN + Up/Down will properly work with the on-screen display correctly moving from right to left.

The symptom above may occur to the following systems:

Lenovo Y470

If you have upgrade Display Adapter from the Intel web page to 8.15.10.2509, the on-screen display no longer works, it freezes, although the screen brightness changes. If we roll back the driver to 2342, the on-screen brightness display will again move as normal.