https://bugzilla.kernel.org/show_bug.cgi?id=208835
--- Comment #2 from sevenever (sevenever@gmail.com) --- (In reply to Alex Deucher from comment #1)
Does it work without the external display connected?
Tried several times, Looks like no problem without the external display connected.
btw, I have kernel option amd_iommu=off and vt.handoff=7