https://bugzilla.kernel.org/show_bug.cgi?id=206475
--- Comment #18 from Marco (rodomar705@protonmail.com) --- As of 5.8.7 I've tried to revert to stock clocks, and I had no black screen issue under load even after long game sessions.
It does *seems* to be fixed, at least for me.
I don't know how much code is shared between the Linux open source driver and the Windows closed source driver, but I wonder if it was some bug that jumped over the Windows driver too (or even if it was firmware related).
I'll keep testing to see if it happens again, but I haven't seen any error logs mentioning amdgpu in the dmesg kernel.