I use a 2011 vintage netbook that has a GMA 3150 graphics, turns out the graphics are purely emulated, there is no real hardware logic.
I have been looking at this issue a lot and I have worked with several machines to see whats up. I sincerely hope that a fix is forthcoming asap I'm amazed that such a problem occurred, a problem that Microsoft had itself created. 'Microsoft Basic Display Adapter' and I'm now pleased to say that it works I checked in Device Manager and found that it had selected ' Intel(R) Graphics 4000 Version 10. Later, I further downloaded and installed updates from Microsoft and was then unable to adjust the screen brightness. I'm pleased to report that solved the problem. Thanks to the advice in this blog I went into theĭevice Manager and changed the display settings to 'Microsoft Basic Display Adapter'.
#LENOVO IDEAPAD P400 BRIGHTNESS CONTROL NOT WORKING WINDOWS 8.1#
Of course this now meant that I then had to reload all my additional programmes as well as get all the Microsoft updates which took 'quite some time'! Finally I then downloaded and installed Windows 8.1 'upgrade' once again, thinking that the problem was solved - but again, when I pressed the brightness key, the screen went dark and Try as I would I was having no success in brightening it so I finally did a factory 'refresh' which put the laptop back to as it was when I bought it which solved the problem. The screen would not change but remained constantly dark, being barely able to be seen. I then went to dim the brightness of the screen which I did and that's when the problems started. Windows 8.1 'upgrade' so that I would be completely up to date with developments. The whole problem started because I updated my laptop (a Lenovo ideapad Z500 touch) to the latest version of I just hope Microsoft actually read these blogs!!!
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