ssteiner78:
1) An Asus representative demonstrates, step by step, how to enable collage mode, 60Hz and at the same side get rid of glitches likes two taskbars in the below youtube video:
http://www.youtube.com/watch?v=_B53D32q5m0
Have you tried this method? Although he says he tries that on an Intel Haswell GPU, he does not specifically mention which particular GPU model (HD 4400, HD 5000, etc) he tries on in the video. Therefore YMMV. Please let us know which specific card you have and whether the method demonstrated in the video works for you or not.
2) It seems Intel has recently released a new driver on 23 March 2014. The method demonstrated in that video may start working after installing the new driver:
Intel Iris and HD graphics Driver v15.33.18 Download
Intel Drivers & Downloads - Intel
Let us know your results.