After a fresh Fedora 33 installation, my computer frequently freezes when I am using three monitors. When the freezing happens, I have to force it to shut down and only use one monitor for it to reboot. If I use three monitors, the reboot will also freeze.
I don’t have this problem when using Fedora 32 or just one monitor with Fedora 33. I guess that the NVIDIA driver shipped with F33 may work well with multiple monitors.
I am using GeForce GTX 1660 and the most recent NVIDIA driver (455.45.01).
Fedora does not include an nvidia driver with any of its releases, and upgrading to F33 will be no different. Nvidia drivers have to be installed from a 3rd party source.
Please post the output of
sudo dnf repolist
so we can see which repo your nvidia drivers were loaded from.
I suggest you install those packages, remove the kmod-nvidia package for your latest kernel “kmod-nvidia-5.9.11*” then reboot so the kmod package gets rebuilt.
If this does not help your issue then I am afraid I am out of ideas.