- May 29, 2013
- Gigabyte Z390 M Gaming
- i9-9900K OC'd @ 5.0GHz
- Vega 56 (Bios flashed to 64)
- Classic Mac
- Mobile Phone
Oof okay so I've had a stable system for a few months now, but after updating to 10.15.1 (and your latest EFI, copying over serial, UUID, and board serial), I am getting some issues.
iGPU is disabled, I have added the agdpmod=pikera flag (that's from memory but the boot flag is copy and pasted from WEG github so it's correct)
Every couple of boots, I get a black screen on my main monitor.
On every boot, the first login screen (filevault?) has a checker-boarded background image. The UI elements are not affected.
But here's the killer. Whenever I play a video (VLC or IINA, not youtube on firefox), I get really bad graphical artifacts. It's where part of the moving image sticks and pixelates (as if you had a bad antenna on a TV.) After about 10 seconds of this, both of my screens go black and my fans go on full blast. The system is still up (there are no crash reports and I can still hear the video playing) but it is no longer usable until I restart.
Again, latest EFI..
Any ideas? I am a software dev so I can do whatever troubleshooting you need; however, I should note that I am not very familiar with debugging macs.
You should not need any agdpmod boot flag if you are using a Vega card.
Yes, the graphics on the FileVault screen may be distorted. I don't know a fix.
I have not had any problems with videos on VLC.
Please try without the agdpmod=pikera and with iMacPro1,1 system definition with IGPU disabled in BIOS.