https://bugzilla.kernel.org/show_bug.cgi?id=205049
--- Comment #3 from lechp@onet.pl --- Booting with amdgpu.ppfeaturemask=0xffff3fff and the other options gives
"error: ../../grub-core/kern/fs.c:167:invalid file name `amdgpu.ppfeaturemask=0xffff3fff Press any key to continue..."