Hang in verbose boot with RX 6600

[andomar]

I upgraded my system (ventura 13.4, Clover 5155) from a RX570 to a RX 6600 Pulse.
I added the required bootarg agdpmod=pikera.

The console output still seems okay during boot but if the monitor-resolution get's switched and the macOS login-screen should appear...:
Nothing! Black screen - and sometimes a reboot after some seconds.

I was able to figure out by experimenting, that if the bootarg -v for verbose mode is removed, the system boots!
This is reproduceable. Cold-boot and warm-boot.

Any ideas?

 

[andomar]

I found a post describing the same problem with OpenCore (instead Clover):
Sadly without a solution...

 

[medianjoe]

I upgraded my system (ventura 13.4, Clover 5155) from a RX570 to a RX 6600 Pulse.
I added the required bootarg agdpmod=pikera.

The console output still seems okay during boot but if the monitor-resolution get's switched and the macOS login-screen should appear...:
Nothing! Black screen - and sometimes a reboot after some seconds.

I was able to figure out by experimenting, that if the bootarg -v for verbose mode is removed, the system boots!
This is reproduceable. Cold-boot and warm-boot.

Any ideas?

I found a post describing the same problem with OpenCore (instead Clover):
Sadly without a solution...

I also have the same issue, with boot-args = -v. Removing -v solves the issue.