Comment # 5 on bug 1215981 from Petr Vorel

Created attachment 869969 [details]
dmesg of the affected system (cmdline cleanup)

I removed modprobe.blacklist=i915 nosimplefb=1 from cmdline. Obviously it did
not solve problem, just to use the default cmdline.

There are some errors, not sure 

[    1.464073] BERT: [Hardware Error]: Skipped 1 error records
...
[    2.052280] pcieport 0000:00:01.0: AER: Multiple Uncorrected (Non-Fatal)
error received: 0000:01:00.0
[    2.052299] pci 0000:01:00.0: PCIe Bus Error: severity=Uncorrected
(Non-Fatal), type=Transaction Layer, (Requester ID)
[    2.052345] pci 0000:01:00.0:   device [10de:25b9] error
status/mask=00100000/00000000
...
[    9.027482] sof-audio-pci-intel-tgl 0000:00:1f.3: init of i915 and HDMI
codec failed
...
[   12.628660] [drm:nv_drm_load [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID
0x00000100] Failed to allocate NvKmsKapiDevice
[   12.629139] [drm:nv_drm_probe_devices [nvidia_drm]] *ERROR* [nvidia-drm]
[GPU ID 0x00000100] Failed to register device

Nvidia card is visible:
$ lspci |grep -i nvidia
01:00.0 VGA compatible controller: NVIDIA Corporation GA107GLM [RTX A1000
Laptop GPU] (rev a1)
01:00.1 Audio device: NVIDIA Corporation Device 2291 (rev a1)