The change is needed in the operating system kernel mode graphics driver. Microsoft is looking into scheduling this development. In the meantime, provided you have purchased a platform allowing you to, the workaround is to disable the low end GPU so Windows uses the only one left. Today, Windows will always use the POST graphics card.
Support for gamma LUT is being added to some devices. See the idea on supporting f.lux.Anonymous commented
This started occurring for me after the Windows anniversary update, and between the NVidia card no longer getting switched on for some apps, and not being able to calibrate my screens, this is a really big issue. My great work setup has now become mediocre, with poorly calibrated monitors and Intel integrated graphics used for some GPU intensive apps...