Hi.
Spec of my M4800
i7-4610M
HD4600 + Quadro K2100M (eDP!!!!!)
and etc.. oh, bios is A16.
I could install el capitan with your guide (without dsdt). I used nv_disable=1 flag.. as you know qe/ci of k2100m + edp combination doesn't work.
So I patched config ang kext for hd4600 and it worked... just for one time.
After restart (or shutdown), bios turns off 'Enable Switchable Graphics' option automatically, so hd 4600 goes away & only k2100m lefts (and not working)..
I'd like to know how to fix this.
