hello, very interesting. I have similar experience with KabyLake mobil-CPU 
i5-7200 on Lenovo 710S Notebook. I tried also Fedora 25 live 64bit and all 
Ubuntu kernel higher than 4.4 failed. 17.04 (build 2017-01-25), kernel from 
Ubuntu mainline 4.9.5 failed to boot. Only all 16.04.1 4.4 kernel and build 
(until 2017-01-25) works fine.
With kernel higher than 4.4 grub start and crash with purple screen:
"Loading initla ramdisk
_"
I documented here: 
https://forums.lenovo.com/t5/Linux-Discussion/IdeaPad710s-80VQ0053GE-kabyLake-i5-7200-only-boots-Kernel-4-4-e/td-p/3552483

I use full-encrypted nve-ssd Intel 600p but also live-USB-Images don't work.
Shall I raise a new bug?

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https://bugs.launchpad.net/bugs/1659340

Title:
  Linux kernel 4.8 hangs at boot up

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