Red alert for Nvidia users!
After this update, Nvidia stopped working, and I canât switch to it or hybrid mode through optimus-manager. I recompiled optimus-manager-git but it didnât help. Restoring system from backup 
Only certain nvidia models I guess? I just tested it in my test-laptop and it works fine with Optimus-Manager, GTX 1050 Ti Mobile, [optimus] startup_mode=nvidia in /etc/optimus-manager/optimus-manager.conf however (I donât run it with the intel GPU at all, since battery is dead for a long time now).
It is possible, but switch is not working, showing error in optimus-manager log. After the system restore from backup, switch is working fine again.
This update is messing something and it looks like others using Nvidia are noticing it as well, each in its own way.
Probably. Looks like the hasty driver upgrade for security reasons wasnât tested enough on their side.
sudo pacman -Syyuu
the nvidia driver 465 downgraded to 460
Oh, thank you!
I have downgraded mesa to 21.0.2 like the other 5600XT oweners. At the moment, mesa-git can not be installed because of dependency issues.
Nvidia driver got downgraded to 460.73.01 [production branch release] as requested here. People who had already updated to 465 series need to do a sudo pacman -Syyuu to get the proper drivers, as some of our Kernels got updated again with this update pack.
Please check if 21.0.3-1.1 fixes your issue with your 5600XT AMD card.
Check if conky 1.12.1+14+g33aa5060-1 helps.
See here:
I can check it, but how do I get that verison? I can only see 21.0.3-1 in the mirrors.
Edit: now I can see the new version on a mirror. Testing it now.
Might take a bit until it hitâs the mirror you are using.
You can either just wait or switch to some other mirror that has synced already.
Tested, all OK!
I even got back the plasma tray and desktop background 
So 21.0.3-1.1 is GOOD!
I already installed AUR version (fresh) and that works 
Booted to black screen after the upgrade, I entered TTY2 and completed the rollback to 460 with pacman -Syyuu
Fortunately, not all Nvidia cards are affected. Looks like this issue is specific for laptops with dual graphics, or some newer cards.
Here, I still use an ancient GeForce GT550 Ti, with driver 390, and that works quite well.
People having issue with the rolled back driver is probably because they missed the proper switch in their pacman command, as explained since the start of thread
Thatâs the legacy driver. Problem is with 465 drivers, which were downgraded to 460, due to some issues, apparently.