Contribute
Register

RX580 with 4K HDR TV - No signal after turning TV off and on

Joined
Nov 8, 2011
Messages
119
Motherboard
Z390M-ITX/ac
CPU
i7-9700K
Graphics
Vega 64
I am on Big Sur with OC 0.6.3.

I have a MSI 8GB RX580 GPU connected via HDMI to a Samsung 4K HDR TV. The HDR works great in Big Sur. On the TV I have to enable "Input Signal Plus" to get the HDR to work.

The problem is if I turn the TV off and on, there is no signal. The only fix is to restart the hackintosh, or to remote in and switch from 60Hz to 50Hz, this is force the signal to start.

If I use a DisplayPort to HDMI cable, the problem goes away, except that HDR no longer works.

I have tried forcing the Orinoco framebuffer, but the problem persists.

I have all sleep disabled and use Amphetamine.app to stay awake.

I would appreciate any help in sorting this out!

thanks
 

Attachments

  • EFI 5.zip
    58.1 MB · Views: 23
  • iMac Pro 2.ioreg
    4.3 MB · Views: 13
Last edited:
Top