Okay, I can confirm mhwd does not show Nvidia drivers up in linux-510 either.
there is not video-nvidia option to select.
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I got the same problem after the big update. But i fixed it by uninstalling nvidia-prime,
nvidia-utils, and lib32-nvidia-utils, then install the driver back with mhwd
hope this helps
I’ve uninstalled nvidia-utils and its dependency linux510-nvidia. I rebooted and still mhwd -a pci nonfree 0300 does not install any nvidia drivers. Nvidia drivers aren’t listed in Manajaro Hardware Manager either.
Did you install the driver using mhwd in some specific way?
I removed nvidia-utils, rebooted, and still same issue. linux510-nvidia are not installed either
Manjaro [Stable Update] 2020-12-30 included new package linux-nvidia replacing linux-510-nvidia-455xx
https://gitlab.manjaro.org/-/snippets/570/raw
linux510-nvidia-455xx 455.45.01-1.1 - linux510-nvidia - 455.45.01-8
I suggest you check to see if you got the updated packages
pamac search -r linux510-nvidia
When I try:
mhwd -a pci nonfree 0300
the output I get is:
Skipping already installed config ‘video-linux’ for device: 0000:41:00.0 (0300:10de:1e04) Display controller nVidia Corporation TU102 [GeForce RTX 2080]
If I unistall video-linux and I run mhwd again, it just simply installs ‘video-linux’ again, regardless if I had specified ‘nonfree’
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Yes, I can see the package linux510-nvidia. I’ve installed it before but I didn’t change anything.
I reinstalled this package again and I am struggling with the same problem. I will give more info about what is installed in my PC:
pamac list -i | grep nvidia
linux510-nvidia 455.45.01-10.0 extra 21,5 MB
mhwd-nvidia 455.45.01-3 core 1,5 kB
mhwd-nvidia-340xx 340.108-1 2,5 kB
mhwd-nvidia-390xx 390.138-1 core 1,9 kB
nvidia-utils 455.45.01-2 extra 326,8 MB
opencl-nvidia 455.45.01-2 extra 88,4 MB
I installed opencl-nvidia manually.
pamac list -i | grep mhwd
mhwd 0.6.5-2 core 253,4 kB
mhwd-amdgpu 19.1.0-1 core 1,0 kB
mhwd-ati 19.1.0-1 core 4,0 kB
mhwd-db 0.6.5-7 core 28,0 kB
mhwd-nvidia 455.45.01-3 core 1,5 kB
mhwd-nvidia-340xx 340.108-1 2,5 kB
mhwd-nvidia-390xx 390.138-1 core 1,9 kB
What if you reinstall mhwd-nvidia ?
Nothing changed 
I have also tried to reinstall that package. It didn’t solve anything.
And mhwd-db ?
bash: mhwd-db: command not found
No, I meant, reinstall it: 
sudo pacman -S mhwd-db
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I got that warning in the installing process but seems like its fixed. Thank you! 
sudo pacman -S mhwd-db
warning: mhwd-db-0.6.5-7 is up to date -- reinstalling
resolving dependencies...
looking for conflicting packages...
Packages (1) mhwd-db-0.6.5-7
Total Installed Size: 0,03 MiB
Net Upgrade Size: 0,00 MiB
:: Proceed with installation? [Y/n] Y
(1/1) checking keys in keyring [################################################] 100%
(1/1) checking package integrity [################################################] 100%
(1/1) loading package files [################################################] 100%
(1/1) checking for file conflicts [################################################] 100%
(1/1) checking available disk space [################################################] 100%
warning: could not get file information for var/lib/mhwd/db/pci/graphic_drivers/hybrid-amd-nvidia-prime/MHWDCONFIG
warning: could not get file information for var/lib/mhwd/db/pci/graphic_drivers/hybrid-intel-nvidia-prime/MHWDCONFIG
warning: could not get file information for var/lib/mhwd/db/pci/graphic_drivers/nvidia/MHWDCONFIG
:: Processing package changes...
(1/1) reinstalling mhwd-db [################################################] 100%
Voila. There we have it.
for some reason those files were missing:
warning: could not get file information for var/lib/mhwd/db/pci/graphic_drivers/hybrid-amd-nvidia-prime/MHWDCONFIG
warning: could not get file information for var/lib/mhwd/db/pci/graphic_drivers/hybrid-intel-nvidia-prime/MHWDCONFIG
warning: could not get file information for var/lib/mhwd/db/pci/graphic_drivers/nvidia/MHWDCONFIG
reinstall brought them back.
@RichardF77 You might want to try the same…
Fixed it for me too
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Thanks man
sudo pacman -S mhwd-db
it solved it for me as well. you are legend my friend.
It would be good to mark this post as solved and pinned somewhere, as other people might have the same issue. This problem happened to me after a fresh install which is uncommon.
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also works here.
I am new to manjaro so this was helpfull
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