Updated to High Sierra from Sierra, garbled screen on boot and login

Couple days ago I updated to High Sierra from Sierra. Everything on Sierra was working fine with my current config. After the updated, the screen now has garbeld graphics and can't see anything. I can remote in via Splashtop and if I change the display settings to scaled from display default and change the resolution down then back up, it comes back fine.

Laptop:

HP Envy 15t-j100

15" FHD screen

HD4600

16GB RAM

MacbookPro 11,1 model

Have updated kexts from the RehadMan repo for my model and installed. Cleared caches and rebooted a couple times. I remember getting this initially after the Sierra upgrade from El Capitan but updating the kexts fixed it so I don't know where to go on this one. Anyone got any ideas? I haven't been able to find a resolution on the insanelymac or tonymac forums, either.

submitted by /u/cosine83
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