Tried to use "nomodeset" or "amd_iommu=off" to GRUB_CMDLINE_LINUX_DEFAULT which allowed screen to work for booting -113 kernel, however PCIe based I225-V network card was not detected.  I was left with only a loopback device.

PC: HP T740 Thin PC / AMD Ryzen V1756B

00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 IOMMU
        Subsystem: Hewlett-Packard Company Raven/Raven2 IOMMU
        Flags: bus master, fast devsel, latency 0, IRQ 25
        Capabilities: [40] Secure device <?>
        Capabilities: [64] MSI: Enable+ Count=1/4 Maskable- 64bit+
        Capabilities: [74] HyperTransport: MSI Mapping Enable+ Fixed+

01:00.0 Ethernet controller: Intel Corporation Ethernet Controller I225-V (rev 03)
        Subsystem: Intel Corporation Ethernet Controller I225-V
        Flags: bus master, fast devsel, latency 0, IRQ 30, IOMMU group 7
        Memory at fe700000 (32-bit, non-prefetchable) [size=1M]
        Memory at fe800000 (32-bit, non-prefetchable) [size=16K]
        Expansion ROM at fe600000 [disabled] [size=1M]
        Capabilities: [40] Power Management version 3
        Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
        Capabilities: [70] MSI-X: Enable+ Count=5 Masked-
        Capabilities: [a0] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Device Serial Number 88-c9-b3-ff-ff-bf-72-fc
        Capabilities: [1c0] Latency Tolerance Reporting
        Capabilities: [1f0] Precision Time Measurement
        Capabilities: [1e0] L1 PM Substates
        Kernel driver in use: igc
        Kernel modules: igc

$ journalctl -b  | grep amdgpu
Jun 28 18:00:20 k3s03 kernel: [drm] amdgpu kernel modesetting enabled.
Jun 28 18:00:20 k3s03 kernel: amdgpu: Topology: Add APU node [0x0:0x0]
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: enabling device (0106 -> 0107)
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: Trusted Memory Zone (TMZ) feature enabled
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: Fetched VBIOS from VFCT
Jun 28 18:00:20 k3s03 kernel: amdgpu: ATOM BIOS: 113-RAVEN-111
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: vgaarb: deactivate vga console
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: VRAM: 256M 0x000000F400000000 - 0x000000F40FFFFFFF (256M used)
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: GART: 1024M 0x0000000000000000 - 0x000000003FFFFFFF
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: AGP: 267419648M 0x000000F800000000 - 0x0000FFFFFFFFFFFF
Jun 28 18:00:20 k3s03 kernel: [drm] amdgpu: 256M of VRAM memory ready
Jun 28 18:00:20 k3s03 kernel: [drm] amdgpu: 3072M of GTT memory ready.
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: PSP runtime database doesn't exist
Jun 28 18:00:20 k3s03 kernel: amdgpu: hwmgr_sw_init smu backed is smu10_smu
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: Will use PSP to load VCN firmware
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: RAS: optional ras ta ucode is not available
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: RAP: optional rap ta ucode is not available
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: SECUREDISPLAY: securedisplay ta ucode is not available
Jun 28 18:00:20 k3s03 kernel: kfd kfd: amdgpu: Allocated 3969056 bytes on gart
Jun 28 18:00:20 k3s03 kernel: amdgpu: HMM registered 256MB device memory
Jun 28 18:00:20 k3s03 kernel: amdgpu: Topology: Add APU node [0x15dd:0x1002]
Jun 28 18:00:20 k3s03 kernel: kfd kfd: amdgpu: added device 1002:15dd
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: SE 1, SH per SE 1, CU per SH 11, active_cu_number 8
Jun 28 18:00:20 k3s03 kernel: fbcon: amdgpudrmfb (fb0) is primary device
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: [drm] fb0: amdgpudrmfb frame buffer device
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: ring gfx uses VM inv eng 0 on hub 0
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: ring comp_1.0.0 uses VM inv eng 1 on hub 0
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: ring comp_1.1.0 uses VM inv eng 4 on hub 0
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: ring comp_1.2.0 uses VM inv eng 5 on hub 0
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: ring comp_1.3.0 uses VM inv eng 6 on hub 0
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: ring comp_1.0.1 uses VM inv eng 7 on hub 0
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: ring comp_1.1.1 uses VM inv eng 8 on hub 0
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: ring comp_1.2.1 uses VM inv eng 9 on hub 0
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: ring comp_1.3.1 uses VM inv eng 10 on hub 0
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: ring kiq_2.1.0 uses VM inv eng 11 on hub 0
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: ring sdma0 uses VM inv eng 0 on hub 1
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: ring vcn_dec uses VM inv eng 1 on hub 1
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: ring vcn_enc0 uses VM inv eng 4 on hub 1
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: ring vcn_enc1 uses VM inv eng 5 on hub 1
Jun 28 18:00:20 k3s03 kernel: amdgpu 0000:03:00.0: amdgpu: ring jpeg_dec uses VM inv eng 6 on hub 1
Jun 28 18:00:20 k3s03 kernel: [drm] Initialized amdgpu 3.42.0 20150101 for 0000:03:00.0 on minor 0
Jun 28 18:00:22 k3s03 sensors[2700]: amdgpu-pci-0300