Fixed yoga 910 screen flicker in Ubuntu 17.10

To fix it, create or edit the file at /usr/share/X11/xorg.conf.d/20-intel.conf as root with the following:

Section "Device"
    Identifier "Intel Graphics"
    Driver "intel"
    Option "AccelMethod" "sna"
    Option "TearFree" "true"
    Option "DRI" "3"
EndSection

And add this:
GRUB_CMDLINE_LINUX_DEFAULT=”i915.enable_rc6=0″
to: /etc/default/grub
cmd: sudo update-grub
restart computer.

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