Same here. Just got my SolidRun Honeycomb LX2 with LX2160A as well, plugged in a 2060 to go with it. Trying to fire up the Nvidia Aarch64 drivers for my 2060.
dmesg shows the same error
[ 8.576481] nvidia: loading out-of-tree module taints kernel.
[ 8.576500] nvidia: module license 'NVIDIA' taints kernel.
[ 8.576501] Disabling lock debugging due to kernel taint
[ 8.797160] nvidia-nvlink: Nvlink Core is being initialized, major device number 506
[ 8.799387] nvidia 0001:01:00.0: Adding to iommu group 4
[ 8.799602] nvidia 0001:01:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=none
[ 8.850131] NVRM: loading NVIDIA UNIX aarch64 Kernel Module 495.29.05 Thu Sep 30 16:29:07 UTC 2021
[ 8.876168] nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms 495.29.05 Thu Sep 30 15:49:43 UTC 2021
[ 8.882428] [drm] [nvidia-drm] [GPU ID 0x00010100] Loading driver
[ 8.882432] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0001:01:00.0 on minor 0
[ 9.075328] random: crng init done
[ 9.075334] random: 7 urandom warning(s) missed due to ratelimiting
[ 10.265811] NVRM: failed to register with the ACPI subsystem!
[ 10.532954] NVRM: GPU 0001:01:00.0: RmInitAdapter failed! (0x24:0x54:1433)
[ 10.533108] NVRM: GPU 0001:01:00.0: rm_init_adapter failed, device minor number 0
[ 10.564299] NVRM: GPU 0001:01:00.0: RmInitAdapter failed! (0x24:0x54:1433)
[ 10.564412] NVRM: GPU 0001:01:00.0: rm_init_adapter failed, device minor number 0
[ 10.574064] NVRM: failed to unregister from the ACPI subsystem!
/var/log/Xorg.0.log shows
[ 10.049] (II) Loading sub module "glxserver_nvidia"
[ 10.049] (II) LoadModule: "glxserver_nvidia"
[ 10.049] (II) Loading /usr/lib/xorg/modules/extensions/libglxserver_nvidia.so
[ 10.072] (II) Module glxserver_nvidia: vendor="NVIDIA Corporation"
[ 10.072] compiled for 1.6.99.901, module version = 1.0.0
[ 10.072] Module class: X.Org Server Extension
[ 10.072] (II) NVIDIA GLX Module 495.29.05 Thu Sep 30 15:52:00 UTC 2021
[ 10.072] (II) NVIDIA: The X server supports PRIME Render Offload.
[ 10.347] (EE) NVIDIA(GPU-0): Failed to initialize the NVIDIA GPU at PCI:1@1:0:0. Please
[ 10.347] (EE) NVIDIA(GPU-0): check your system's kernel log for additional error
[ 10.347] (EE) NVIDIA(GPU-0): messages and refer to Chapter 8: Common Problems in the
[ 10.347] (EE) NVIDIA(GPU-0): README for additional information.
[ 10.347] (EE) NVIDIA(GPU-0): Failed to initialize the NVIDIA graphics device!
[ 10.347] (EE) NVIDIA(0): Failing initialization of X screen
[ 10.347] (II) UnloadModule: "nvidia"
[ 10.347] (II) UnloadSubModule: "glxserver_nvidia"
[ 10.347] (II) Unloading glxserver_nvidia
Tried pci=noacpi and acpi=off and that didn’t change anything.
Chapter 2. Minimum Requirements seems to indicate only a limited list of CPUs are supported, but no clear explanation as to why. I also couldn’t find any of this information when I looked some 5+ months ago and ordered all the parts.