Dual monitor on boot not working

[dalisoft]

At boot level even after login screen dual-monitor does not work, only primary display works.

As a workaround you can change monitor source to another and revert back to get it work

[supng]

Could be related to the following points:

• When and how should I use custom connectors?
• How can I change display priority?
  https://github.com/acidanthera/WhateverGreen/blob/master/Manual/FAQ.Radeon.en.md

[dalisoft]

Thank you for useful resource @supng

I am seen many of them and as i work regulary and it takes a lot of my time, currently decided use Windows and back to Hackintosh on vacation (i think it's close to christmas/new year).

Thank you again, any PR is welcome

[dalisoft]

This commit fixes this issue.

Thank you for tips @supng

More info: i'm made DSL file and tried compile but failed (idk why).
Some values are in comment for writing and some of them are copied at https://github.com/acidanthera/WhateverGreen/blob/5aa831a224a87b1633009537283e394ec9ed2dd7/Manual/reference.cpp#L86-L108 for my GPU
Then tried to insert these values into DeviceProperties, after few tests, voila it works

Note: HDMI A/B types are different.

So, it now works. Just remember to switch to HDMI source on your monitor