Using an HP Notebook and the latest nvidia driver (515) I have no output over HDMI, because the driver is not loaded.
lspci -v says that there is an unknown header type
01:00.0 VGA compatible controller: NVIDIA Corporation GA107GLM [RTX A2000 Mobile] (rev a1) (prog-if 00 [VGA controller])
Subsystem: Hewlett-Packard Company GA107GLM [RTX A2000 Mobile]
!!! Unknown header type 7f
Memory at 6d000000 (32-bit, non-prefetchable) [size=16M]
Memory at 6000000000 (64-bit, prefetchable) [size=4G]
Memory at 6100000000 (64-bit, prefetchable) [size=32M]
I/O ports at 3000 [size=128]
Expansion ROM at 6e080000 [disabled] [size=512K]
Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia
01:00.1 Audio device: NVIDIA Corporation Device 2291 (rev a1)
Subsystem: Hewlett-Packard Company Device 886d
!!! Unknown header type 7f
Memory at 6e000000 (32-bit, non-prefetchable) [size=16K]
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
nvidia-bug-report.log.gz (92.0 KB)