Just to save anyone living dangerously and updating to the latest and greatest betas some time, a nasty KP occurs after upgrading to 10.15.4 beta 2 using an HD520 (Thinkpad X260). You need to boot with a GFX FakeID of 0x12345678 and then build the latest WhateverGreen with yesterday's commits. Per the changelog:
- Improved firmware loading handling on 10.15.4 (may fix booting issues on KBL+)
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