Carbonimax Posted September 29, 2019 Share Posted September 29, 2019 (edited) Hi I have only one monitor working after boot macOS. I have to switch off / on or sometimes disconnect / reconnect DP cable of the second monitor and it works again. During all the boot process, the second monitor is sleeping, it just flash quickly and switch off in the middle of the loading. I use Lilu/WhateverGreen kexts with Clover r5092. Radeon RX Vega 64 ROG STRIX GAMING OC - 8 Go 2 x Dell 4k plugged in DisplayPort Additionally, the second monitor is laggy, like if the cursor or windows don't move exactly with my mouse. Any idea? EFI.zip Edited September 29, 2019 by Carbonimax Link to comment Share on other sites More sharing options...
Carbonimax Posted October 3, 2019 Author Share Posted October 3, 2019 (edited) In Catalina, I found the 1st monitor is 60Hz and the 2nd monitor is 30Hz... -rad24 to enforce 24-bit display mode don't help. Edited October 3, 2019 by Carbonimax Link to comment Share on other sites More sharing options...
Delecta Posted October 18, 2019 Share Posted October 18, 2019 Can you change the refresh rate in the monitor system preference settings ? Link to comment Share on other sites More sharing options...
Carbonimax Posted October 19, 2019 Author Share Posted October 19, 2019 (edited) Now it's OK, I have 60Hz on both screens but I have to put off and on the second monitor after each boot... Edited October 19, 2019 by Carbonimax Link to comment Share on other sites More sharing options...
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