Can anyone help me with this?? So my 7510 has an AMD w5170m (R9 375x) and the Intel HD 530. Here is my issue:
iGPU only: interal display works correctly, external video outputs (HDMI, miniDP) don't work at all; kernel panic on the miniDP
dGPU only: using Ebi framebuffer and ATI inject (Verde kext too for power gates) the system boots but I am getting low color depth on my internal display, there is color banding, gradients look bad. But the HDMI and miniDP work and there is no color banding on the external displays, only my laptop display and I can't fix it... I tried EDID injection... Won't fix it. I tried injecting different framebuffers.. modifiying framebuffers.. (this was all done without whatevergreen.kext btw) With whatevergreen it's the same issue though, low color depth and color banding...
iGPU + dGPU: Intel controls the laptop display and it works fine, good color depth. External video outputs only show black screens, but the Mac system recognizes they are there in system prefs. Just black.
Ideally, I would just like to pick one GPU and disable the other, but have fully functionallity. If I can fix the video ouputs on the iGPU, or fix the color banding on the dGPU.
Any help would be appreciated.