Strange issue with latest Sonoma build on MacPro6,1

I just installed the latest version of Sonoma, and now I'm getting stuck at the login screen. I can't control the cursor or type in my password. The screen just flickers.
I have tried booting into safe mode to run the patcher post install, but it still does it.
Any ideas before doing a clean install of macOS?

submitted by /u/nonspecificloser
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