I tried 4.10 there, and got two nasty messages during bootup. Am I the last one running 32 bit kernels?
I was hoping to get three-monitor configuration on my desk, but apparently X220 can not do that. xrandr reports 8 outputs (!), but it physically only has 3: LVDS, displayport and VGA. Unfortunately, it seems to only have 2 CRTCs, so only 2 outputs can be active at a time. Is there a way around that?