https://bugzilla.kernel.org/show_bug.cgi?id=207383
--- Comment #42 from Duncan (1i5t5.duncan@cox.net) --- (In reply to Alex Deucher from comment #40)
Does this patch help?
No. v5.7 with the patch applied gave me the same graphics freeze, with the usual log trace confirming it's _this_ bug.
Sigh, back to the bisect. =:^(