https://bugzilla.kernel.org/show_bug.cgi?id=193651
--- Comment #28 from fin4478@hotmail.com --- (In reply to Alex Deucher from comment #11)
(In reply to fin4478 from comment #8)
Alex, thanks for the new firmware. Still Bios recognition errors at boot, but otherwise ok.
[ 3.461112] [drm] BIOS signature incorrect 20 7 [ 3.461117] amdgpu 0000:01:00.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0xffff
This is harmless. The driver tries several methods to fetch the vbios image. The driver would not load at all if it failed to fetch the vbios image.
All messages that use the dev_err function slows down booting and make it look ugly. Amd should manage this fix to the pci driver: Change Invalid PCI ROM header signature message to use the dev_info function in drivers/pci/rom.c