Dual-graphics: Module fbcon not found

System: ASUS Z390-PRO with Debian 4.19.67-2+deb10u2 and i915 Intel graphics

I am trying to install a second graphics adapter (MSI Radeon HD 5450). Relevant output from lspci:

00:02.0 VGA compatible controller: Intel Corporation Device 3e98
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cedar [Radeon HD 5000/6000/7350/8350 Series]

The system is a clean install that is working fine without the second adapter. I think I have come a long way with the configuration but something is still missing after two days of work. I get the following error in my /var/log/lightdm/x-0.log:

modprobe: FATAL: Module fbcon not found in directory /lib/modules/4.19.0-6-amd64

I can not access the tty[1-6] nor is there anything on the graphics output post the GRUB menu when the second card is booted up. Interestingly, when I xrdp into the box, I can start my Xcfe4 desktop just fine!

I am using the following xorg.conf file, which should be OK for the system:

Section "ServerLayout"
    Identifier     "X.org Configured"
    Screen      0  "Screen0" 0 0
    Screen      1  "Screen1" RightOf "Screen0"
EndSection

Section "Module"
    Load  "glx"
EndSection

Section "Monitor"
    Identifier   "Monitor0"
    VendorName   "Monitor Vendor"
    ModelName    "Monitor Model"
EndSection

Section "Monitor"
    Identifier   "Monitor1"
    VendorName   "Monitor Vendor"
    ModelName    "Monitor Model"
EndSection


Section "Device"
    Identifier  "Intel Graphics 3e98 i915"
    Driver      "intel"
    BusID       "PCI:0@0:2:0"
    Option      "Primary" "true"
EndSection

Section "Device"
    Identifier  "MSI Radeon HD 5450"
    Driver      "amdgpu"
    BusID       "PCI:2@0:0:0"
EndSection

Section "Screen"
    Identifier "Screen0"
    Device     "Intel Graphics 3e98 i915"
    Monitor    "Monitor0"
EndSection

Section "Screen"
    Identifier "Screen1"
    Device     "MSI Radeon HD 5450"
    Monitor    "Monitor1"
EndSection

The Xorg.0.log file does not look too bad:

[   693.077] 
X.Org X Server 1.20.4
X Protocol Version 11, Revision 0
[   693.077] Build Operating System: Linux 4.9.0-8-amd64 x86_64 Debian
[   693.077] Current Operating System: Linux server 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u2 (2019-11-11) x86_64
[   693.077] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.19.0-6-amd64 root=UUID=854d6368-fdc4-4385-bdca-904c7f993755 ro quiet intel_iommu=on
[   693.077] Build Date: 05 March 2019  08:11:12PM
[   693.077] xorg-server 2:1.20.4-1 (https://www.debian.org/support) 
[   693.077] Current version of pixman: 0.36.0
[   693.077]    Before reporting problems, check http://wiki.x.org
    to make sure that you have the latest version.
[   693.077] Markers: (--) probed, (**) from config file, (==) default setting,
    (++) from command line, (!!) notice, (II) informational,
    (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[   693.077] (==) Log file: "/var/log/Xorg.0.log", Time: Fri Jan 24 18:50:15 2020
[   693.077] (==) Using config file: "/etc/X11/xorg.conf"
[   693.077] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[   693.078] (==) ServerLayout "X.org Configured"
[   693.078] (**) |-->Screen "Screen0" (0)
[   693.078] (**) |   |-->Monitor "Monitor0"
[   693.078] (**) |   |-->Device "Intel Graphics 3e98 i915"
[   693.078] (**) |-->Screen "Screen1" (1)
[   693.078] (**) |   |-->Monitor "Monitor1"
[   693.078] (**) |   |-->Device "MSI Radeon HD 5450"
[   693.078] (==) Automatically adding devices
[   693.078] (==) Automatically enabling devices
[   693.078] (==) Automatically adding GPU devices
[   693.078] (==) Max clients allowed: 256, resource mask: 0x1fffff
[   693.078] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[   693.078]    Entry deleted from font path.
[   693.078] (==) FontPath set to:
    /usr/share/fonts/X11/misc,
    /usr/share/fonts/X11/100dpi/:unscaled,
    /usr/share/fonts/X11/75dpi/:unscaled,
    /usr/share/fonts/X11/Type1,
    /usr/share/fonts/X11/100dpi,
    /usr/share/fonts/X11/75dpi,
    built-ins
[   693.078] (==) ModulePath set to "/usr/lib/xorg/modules"
[   693.078] (II) The server relies on udev to provide the list of input devices.
    If no devices become available, reconfigure udev or disable AutoAddDevices.
[   693.078] (II) Loader magic: 0x558509423e20
[   693.078] (II) Module ABI versions:
[   693.078]    X.Org ANSI C Emulation: 0.4
[   693.078]    X.Org Video Driver: 24.0
[   693.078]    X.Org XInput driver : 24.1
[   693.078]    X.Org Server Extension : 10.0
[   693.078] (++) using VT number 7

[   693.078] (II) systemd-logind: logind integration requires -keeptty and -keeptty was not provided, disabling logind integration
[   693.079] (II) xfree86: Adding drm device (/dev/dri/card0)
[   693.079] (EE) /dev/dri/card0: failed to set DRM interface version 1.4: Permission denied
[   693.080] (--) PCI: (0@0:2:0) 8086:3e98:1043:8694 rev 0, Mem @ 0xa0000000/16777216, 0x80000000/268435456, I/O @ 0x00004000/64
[   693.080] (--) PCI:*(2@0:0:0) 1002:68f9:1462:2131 rev 0, Mem @ 0x90000000/268435456, 0xa1220000/131072, I/O @ 0x00003000/256, BIOS @ 0x????????/131072
[   693.080] (II) "glx" will be loaded. This was enabled by default and also specified in the config file.
[   693.080] (II) LoadModule: "glx"
[   693.080] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[   693.080] (II) Module glx: vendor="X.Org Foundation"
[   693.080]    compiled for 1.20.4, module version = 1.0.0
[   693.080]    ABI class: X.Org Server Extension, version 10.0
[   693.080] (II) LoadModule: "intel"
[   693.080] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so
[   693.081] (II) Module intel: vendor="X.Org Foundation"
[   693.081]    compiled for 1.20.1, module version = 2.99.917
[   693.081]    Module class: X.Org Video Driver
[   693.081]    ABI class: X.Org Video Driver, version 24.0
[   693.081] (II) LoadModule: "amdgpu"
[   693.081] (II) Loading /usr/lib/xorg/modules/drivers/amdgpu_drv.so
[   693.081] (II) Module amdgpu: vendor="X.Org Foundation"
[   693.081]    compiled for 1.20.3, module version = 18.1.99
[   693.081]    Module class: X.Org Video Driver
[   693.081]    ABI class: X.Org Video Driver, version 24.0
[   693.081] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets:
    i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G,
    915G, E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM,
    Pineview G, 965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33,
    GM45, 4 Series, G45/G43, Q45/Q43, G41, B43
[   693.081] (II) intel: Driver for Intel(R) HD Graphics
[   693.081] (II) intel: Driver for Intel(R) Iris(TM) Graphics
[   693.081] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics
[   693.081] (II) AMDGPU: Driver for AMD Radeon:
    All GPUs supported by the amdgpu kernel driver

I feel I am close but how can I proceed from here??? Any suggestions are welcome.