5 Replies Latest reply on Aug 17, 2016 1:04 PM by Intel Corporation

    Ultrabook resolution halving and battery saving

    LXO

      Me as many of students just bought a ultra book for school start. I got a Lenovo yoga 900 isk2, lovely computer, at least on paper. It has a bigger battery than any other ultra book that i know of but it's battery life is simply not that good. Why? Well the GPU (intel Iris 540) has to push out a whopping 3200*1800 pixels for this tiny screen.

       

      My solution to this problem was simply to halve the resolution, 1600*900, still better DPI than my stationary. With windows 10 scaling there should hardly be any difference on running  3600*1800 200% scaling or 1600*900 at 100%.

       

      But there is. At 1600*900 the screen looks blurry, text is almost unreadable and edges between colors looks brown. That seems strange since each pixel sent out from the GPU should just take up 2*2 pixels on the screen. So why is it like this, I'm not totally sure but my best guess is that the screen uses some kind of blurring to fill the whole screen, probably bicubic interpolation. Underneath you'll se an example of how it looks and how it should look.

      3200*1800 100% scaling1600*900 100% scaling (How it looks today)1600*900 100% scaling (How it should look)
      3200100P.jpgHow it looks now.jpgHow it should look.jpg

       

       

      So this is my question: How do I turn of interpolation at the resolution 1600*900, is it possible?

       

      I understand that the problem may lie with the screen drivers so I'll post my question on Lenovos page as well.