Use this string at chimera/chameleon boot:
"HD4000PlatformId=4", and optionally ("Graphics Mode"="1920x1080x32") just don't use "1366x768x32" unless you have that resolution display.
Also, you can try "HD4000PlatformId" range from 0,1,2,3,4, (Mine works on 4)
Finally, it looks like it might...