hey, i have the same problem. i have msi rx6800xt gaming trio with lg ultra wide monitor. when boot i get oc picker and i get verbose for a while. then monitor go to no signal until the login screen. i tried everything you mentioned also hdmi. still no difference. i used Radeon vii which doesn't had this problem. also i noticed when update mac os with this gpu no signal until the fully install and boot.
Any news on this issue?
I'm suffering from hanging on this stage (can't access it with either remote or ssh) and missing apple progress bar screen when daily booting my Hack inconsistently. (around 30% time it fails) Eventually, I had to push reset button for a restart and try again, at the most time it gracefully entered login screen with only 5 seconds of black screen after verbos.
I believe this stage is called the second stage boot according to this
post. I successfully inject "AAPL,boot-display" via deviceproperties section of config.plist to the first ATY,RadeonFramebuffer of my MSI RX6600XT MECH 2X OC, but the result is without any difference.
Another issue is a minute and 20-sec long boot delay in recovery. It happens before the 2nd boot stage similar to normal OS boots, But apple progress bar did appear this time and its been cut short (without finishing the hall bar, compared to GTX760 installed did with Ventura 13.0.1)
Here are the methods I studied.
1. understanding the mechanism of Custom framebuffer patching technics
but all of them only apply on Polaris before
2. study vBIOS and port definition within and ATY,bin_image injection with SSDT
thanks to
TheBloke and
byteminer inspiration I was able to separate a 43kB wise of section before GPO, but yield nothing.
Finally, I find properties of NAVI framebuffers aren't tied to a specific port of card (like iGPU or older GPUs) anymore, as I replug all of my monitors in OS around ports the attachment of "apple display" prioritize lower No. of Framebuffe and adjust its "connector-type" and "av-signal-type" in Ioreg.
Hope SB can shed some light on this issue, and push on solving it together.