Monitor does not find signal after being off for a while and turning on again.

I have a RX580 running on Big Sur with opencore .6.3 it is connected vis HDMI for 4K HDR to a Samsung TV.

The problem is that if the TV is turned off for a while, when it is turned on again, there is no signal.

I have searched for this problem, and many sharing the same frustration, but no solution.

One posted suggested checking the frame buffer in DPCIManager, but it shows nothing. They said they set frame buffer as Orinoco but I cannot find information on how to do that.

This is the PCI info I have in my config.plist:

<dict>

<key>PciRoot(0x1)/Pci(0x1C,0x0)/Pci(0x0,0x0)</key> <dict>

<key>AAPL,slot-name</key>

<string>Internal@1,28,0/0,0</string>

<key>device_type</key>

<string>VGA compatible controller</string>

<key>model</key>

<string>Ellesmere [Radeon RX 470/480/570/570X/580/580X/590]</string>

</dict> </dict>

I don't have any dark wake set. Is that still relevant in opencore?

I have Lilu and WhateverGreen. I have all sleep and hibernate disabled. I even use Amphetamine.app to prevent any kind of sleep.

submitted by /u/ikukuru
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