I have Lenovo G505s notebook.
I tried to instal latest Crimson edition software but i had problem with compactibility.
Q: Is there any crimson software for combination of graphic card R5 M230 and GPU HD7640G ?
Those notebooks came with windows 8, if that is the OS you are using that may be the problem.
I read something about windows 8 is not being supported, but I could not fine that reference material to support my assumption.
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Laptop graphics update...How to
How to Configure Laptop Switchable Graphics
install all windows updates, the video drivers expect them all to be installed
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