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      IdeaPad Y470 Brightness Toggle Problem

      Symptom

      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.

       

      Affected configurations

      The symptom above may occur to the following systems:

      Lenovo Y470

       

      Solution

      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.

       

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      • Alias ID: IN20121116-001
      • Document ID: HT075864
      • Last Updated :26 Mar 2014
      • © 2015 Lenovo