The reason is that your card is so new. So with the commands @Aravisian showed you can get you into Graphic interface - Then you can install the latest nvidia driver.
Alright. In my case, it says "NVIDIA Corporation: Unknown" in the top, followed by: "This device is using a manually-installed driver". I remember seeing some message during the installation about detecting devices, could it be that the installer tried installing something based on what devices that were discovered during that?
The only option that is active is "Continue using a manually installed driver".
It also says "No proprietary drivers are in use" at the bottom.
I'll try the solution you suggested above in the terminal.
@Storm I didn't get any black screen and now when I look in the Software & Updates app, it says that I'm using "NVIDIA driver metapackage from nvidia-driver-535 (proprietary)".
So I guess that fixed it? It still says "NVIDIA Corporation: Unknown" at the top, but is that because it's too new for Zorin to recognise?
@Storm I'll try your suggestion, just wanted to provide some info that I found following the official guide for activating Nvidia here on zorin.com. I had a look under Settings > About and under Graphics it says "llvmpipe (LLVM 12.0.0, 256 bits)".
Also, during boot I noticed an error that says:
[drm:nv_drm_load [nvidia_drm]] ERROR [nvidia-drm] [GPU ID 0x00000100] Failed to allocate NvKmsKapiDevice
[drm:nv_drm_probe_devices [nvidia_drm]] ERROR [nvidia-drm] [GPU ID 0x00000100] Failed to register device
And just to clarify, I'm still using GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset" as I assume that removing nomodeset would make the black screen return.
I ended up using this tutorial for purging everything Nvidia and reinstalled the nvidia-driver-535. Got a black screen while installing but after reboot it seems to work without any issues. I can now open the Nvidia settings and I see a lot more things in the settings plus it says "Nvidia Corporation" under Settings > About.
My pleasure. Note that every time you get a kernel update you need to re-install/build the driver when chose to manually install the nvidia driver by the guide you posted.