Hy,
as my display only supports hdmi, all ioreg files i sent yet, were taken after i reconnected hdmi. i attached a new one; this one was taken after reboot and reconnecting the hdmi port.
i also did some tests with an displayport-hdmi converter cable today (smbios macmini):
- booting up with displayport connected via converter leads to just showing opencore boot menu following some verbose/debug output. but i dont ever see the apple logo loading screen or the login screen.
- booting up with hdmi connected, then reconnecting hdmi and finally connecting to the displayport converter cable brings no signal to my screen. i did the same test earlier (with smbios imac18) my result was a pinkish screen.
br TT