Lenovo y50-70 glitches

Hi, I have an installation of the captain in my leonovo that works great in the great guide rehabman.
my system has:

cpu: i7 4720hq
gpu: hq4600
ram: 16gb
256gb ssd

but I have a problem that I can not solve much I read and seek information.

the problem starts from the installation. There are flashes throughout the process

When the installation ends I still flickers, stripes, until change the UEFI boot.
so the system works all right after installing kext and patch.

the problem comes when...

Lenovo y50-70 glitches