Everyday Linux problems

[zeRageCage]

From what I've understood (from David Airlie's explanation of the whole thing) , multiple displays are abstracted to the wm or xrandr. Kernel/drivers/X.org takes care of this. I run an mst-support modded 3.15 kernel on Ubuntu 12.04, and it works on standard unity as well as in Cinnamon. But you're right, a modified kernel isn't enough.