I installed Fedora 41 on an old laptop. It’s got an Nvidia GPU. GT 600 or something. I tried to install 500 drivers from RPM Fusion, no luck. I looked up that this old GPU needs 390 and I tried that too, no luck. I also upgraded to Fedora 42 but it won’t boot. Kernel 6.11 of Fedora 41 works but not 6.14.4. Kernel 6.14.5 of Fedora 42 is the same. Should I install Fedora 42 from scratch from USB?
For such old graphics cards that require the 390.xx drivers, you could consider staying on the nouveau drivers instead.
For the F42 boot entry that doesn’t boot, you can try editing the grub menu and remove the rd.driver.blacklist=nouveau and modprobe.blacklist=nouveau boot parameters. Then boot the system.
If it boots afterwards just fine, you can make the changes permanently by using grubby and removing the above mentioned kernel arguments.