AudioLab Posted November 4, 2021 Author Share Posted November 4, 2021 @Jake Lo Bang! it worked! Thank you very much! I hope one day to return the favor! Thanks again Jake! @Hervé Hi I tried to follow your guide but with no luck, I probably made a mistake or I missed something. I'm a bit rusty! I was better when Clover came out. Yes, the 7040 is basically the same machine with more RAM management. At least what I remember. Anyway I love this forum. it is very well structured. Thanks for your interest. We will see soon around here Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted November 4, 2021 Moderators Share Posted November 4, 2021 2 or 3 displays? Can you post a new IOReg file? Link to comment Share on other sites More sharing options...
AudioLab Posted November 4, 2021 Author Share Posted November 4, 2021 at the moment 2 monitors but if I switch from one dp to the other the works anyway so I think 3 monitors should works. attached the ioreg file 2.1 ioreg 2 monitor hdmi+dp.zip Link to comment Share on other sites More sharing options...
AudioLab Posted November 6, 2021 Author Share Posted November 6, 2021 A strange 2 things occured: if I turno off one monitor the other power off. It's bilateral. And the other is: if I choose personalized resolution on screen, both cannot run over 1600x900: why? Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted November 6, 2021 Moderators Share Posted November 6, 2021 What's the highest resolution for the displays? Are you connected with DP to DP or using adapter like HDMI to DP or DVI to DP? Link to comment Share on other sites More sharing options...
AudioLab Posted November 6, 2021 Author Share Posted November 6, 2021 Both display are full HD so their Max resolution is 1920 * 1080. There is no adapter between the cables and monitors. They are connected One with HDMI to HDMI and other with displayport to displayport. Sometimes boot screen fails with boot display that became Black.Of course if I try i cannot connect with remote connection such anydesk, 'cause anydesk screen is black too. Link to comment Share on other sites More sharing options...
AudioLab Posted November 7, 2021 Author Share Posted November 7, 2021 Update: the resolution is right due the fact that there is 1080p item and I missed. So resolution works as well. Remains the First problem Link to comment Share on other sites More sharing options...
AudioLab Posted November 7, 2021 Author Share Posted November 7, 2021 On 11/6/2021 at 5:42 PM, Jake Lo said: What's the highest resolution for the displays? Are you connected with DP to DP or using adapter like HDMI to DP or DVI to DP? Jake,please, Do you have some solution to black screen? Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted November 7, 2021 Moderators Share Posted November 7, 2021 try add to boot-args igfxonln=1 Link to comment Share on other sites More sharing options...
AudioLab Posted November 7, 2021 Author Share Posted November 7, 2021 Thanks. I will try and let you know. No way. Has done boot correctly one time at next boot both screens black. The strange fact is that sometimes boot correctly showing both monitors on and more often instead screen black with backlight on and only dp monitor show mouse cursor move very dimmered but I cannot reach login Window. Link to comment Share on other sites More sharing options...
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