i've a dual gpu system

inxi -GS System: Host: ws05 Kernel: 5.14.13-200.fc34.x86_64 x86_64 bits: 64 Console: tty pts/0 Distro: Fedora release 34 (Thirty Four) (1) Graphics: Device-1: NVIDIA GK208B [GeForce GT 710] driver: nvidia v: 470.74 (2) Device-2: Advanced Micro Devices [AMD/ATI] Cezanne driver: N/A Display: server: X.org 1.20.11 driver: loaded: nvidia unloaded: fbdev,modesetting,vesa Message: Advanced graphics data unavailable for root.

running on

cpu: Ryzen 5 5600G mobo: ASRockRack X470D4U bios: vP4.20, 04/14/2021 kernel: 5.14.13-200.fc34.x86_64 x86_64

where,

the nvidia is a PCIe card the amdgpu is the Ryzen-integrated gpu

the nvidia PCI is currently my primary it's screen-attached, and boots/functions correctly

lsmod | grep nvidia nvidia_drm 69632 0 nvidia_modeset 1200128 1 nvidia_drm nvidia 35332096 1 nvidia_modeset drm_kms_helper 303104 2 amdgpu,nvidia_drm drm 630784 8 gpu_sched,drm_kms_helper,nvidia,amdgpu,drm_ttm_helper,nvidia_drm,ttm

dmesg | grep -i nvidia [ 5.755494] nvidia: loading out-of-tree module taints kernel. [ 5.755503] nvidia: module license 'NVIDIA' taints kernel. [ 5.759769] nvidia: module verification failed: signature and/or required key missing - tainting kernel [ 5.774894] nvidia-nvlink: Nvlink Core is being initialized, major device number 234 [ 5.775299] nvidia 0000:10:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=io+mem [ 5.975449] NVRM: loading NVIDIA UNIX x86_64 Kernel Module 470.74 Mon Sep 13 23:09:15 UTC 2021 [ 6.013181] nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms 470.74 Mon Sep 13 22:59:50 UTC 2021 [ 6.016444] [drm] [nvidia-drm] [GPU ID 0x00001000] Loading driver [ 6.227295] caller _nv000723rm+0x1ad/0x200 [nvidia] mapping multiple BARs [ 6.954906] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:10:00.0 on minor 0 [ 16.820758] input: HDA NVidia HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:01.1/0000:10:00.1/sound/card0/input13 [ 16.820776] input: HDA NVidia HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:01.1/0000:10:00.1/sound/card0/input14 [ 16.820808] input: HDA NVidia HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:01.1/0000:10:00.1/sound/card0/input15 [ 16.820826] input: HDA NVidia HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:01.1/0000:10:00.1/sound/card0/input16 [ 16.820841] input: HDA NVidia HDMI/DP,pcm=10 as /devices/pci0000:00/0000:00:01.1/0000:10:00.1/sound/card0/input17

the amdgpu is not (currently/yet) in use; no attached screen

in BIOS, currently,

'PCI Express' (nvidia gpu) is selected as primary 'HybridGraphics' is enabled 'OnBoard VGA' is enabled

on boot, mods are loaded

lsmod | grep gpu amdgpu 7802880 0 drm_ttm_helper 16384 1 amdgpu ttm 81920 2 amdgpu,drm_ttm_helper iommu_v2 24576 1 amdgpu gpu_sched 45056 1 amdgpu drm_kms_helper 303104 2 amdgpu,nvidia_drm drm 630784 8 gpu_sched,drm_kms_helper,nvidia,amdgpu,drm_ttm_helper,nvidia_drm,ttm i2c_algo_bit 16384 2 igb,amdgpu

but i see a 'fatal error' and 'failed' probe,

dmesg | grep -i amdgpu [ 5.161923] [drm] amdgpu kernel modesetting enabled. [ 5.162097] amdgpu: Virtual CRAT table created for CPU [ 5.162104] amdgpu: Topology: Add CPU node [ 5.162197] amdgpu 0000:30:00.0: enabling device (0000 -> 0003) [ 5.162232] amdgpu 0000:30:00.0: amdgpu: Trusted Memory Zone (TMZ) feature enabled [ 5.169105] amdgpu 0000:30:00.0: BAR 6: can't assign [??? 0x00000000 flags 0x20000000] (bogus alignment) [ 5.174413] amdgpu 0000:30:00.0: amdgpu: Unable to locate a BIOS ROM [ 5.174415] amdgpu 0000:30:00.0: amdgpu: Fatal error during GPU init [ 5.174416] amdgpu 0000:30:00.0: amdgpu: amdgpu: finishing device. [ 5.174425] Modules linked in: amdgpu(+) uas usb_storage fjes(-) raid1 drm_ttm_helper ttm iommu_v2 gpu_sched drm_kms_helper crct10dif_pclmul crc32_pclmul igb crc32c_intel cec ghash_clmulni_intel drm sp5100_tco dca ccp i2c_algo_bit wmi video sunrpc tcp_bbr nct6775 hwmon_vid k10temp [ 5.174463] amdgpu_device_fini_hw+0x33/0x2c5 [amdgpu] [ 5.174594] amdgpu_driver_load_kms.cold+0x72/0x94 [amdgpu] [ 5.174706] amdgpu_pci_probe+0x110/0x1a0 [amdgpu] [ 5.174907] amdgpu: probe of 0000:30:00.0 failed with error -22

are specific configs from

https://www.kernel.org/doc/html/latest/gpu/amdgpu.html

required to avoid/workaround the init error? or known bug?