https://bugzilla.kernel.org/show_bug.cgi?id=212107
--- Comment #3 from Martin (martin.tk@gmx.com) --- (In reply to Dieter Nützel from comment #2)
It could be the ZeroCore thing, which has finally landed with 5.11. Please verify, that your gfx fans stopped with 5.11 and running with all kernels below 5.11.
Bloody hell, you're right. On 5.11.4 the fan on gpu stops completely, even though sensors claim it's spinning.
I suppose I'm lucky I didn't fry my gpu ._.
How is that even possible?