Maybe a bit off topic. But this config solved my flickering issues on my Dell XPS 13 (9350) with the Intel HD Graphics 520
add /usr/share/X11/xorg.conf.d/20-intel.conf
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "AccelMethod" "sna"
Option "TearFree" "true"
Option "DRI" "3"
EndSection
Restart your X
systemctl restart lightdm
And any flickering should be gone.
Update: With kernel 4.4.0-42-generic Screen and Touchscreen are working after suspend.