Comment # 36 on bug 969098 from Takashi Iwai

Hm, the hwinfo output doesn't look like the complete one.  Could you just run
hwinfo and get the whole output, as in the original report?

Meanwhile, I found that the boot hang of a Skylake machine here with the recent
kernel isn't about intel_idle but intel_pstate (or a bad mixture of them).
Could you check whether passing intel_pstate=disable boot option alone works
without idle=nomwait option?

BTW, regarding the text mode on 4.3 and 4.4 kernels.  Do you mean that X
couldn't be started and stays at Linux console?  If so, you might see some
error in /var/log/Xorg.0.log or such.  (or journal output, depending on the
desktop.)