I had a (rare) need to test the latest NVIDIA driver 575.64.03 with the Fedora 42 kernel (6.15.4-200.fc42.x86_64) and found that I was getting unexpected SSL errors, and ‘device not found’ when trying to load the modules..

After some more research. I found that Fedora had already included the new open-source NovaCore drivers as standard, and these were causing all the issues..

To stop them from being loaded, I added rd.driver.blacklist=nova_core to the kernel command line and created a file /etc/modprobe.d/nvidia-novacore-blacklist.conf with contents blacklist nova_core

After reboot, the NVIDIA driver installed correctly..

Note that the location of the ‘blacklist.conf’ file may vary for other distributions..

Robert Gadsdon. July 8th 2025.