I did
sudo dnf system-upgrade download --releasever=24
--enablerepo=rpmfusion-free-updates-testing
--enablerepo=rpmfusion-nonfree-updates-testing --nogpgcheck
which downloaded a lot of packages and ended with
Complete!
Download complete! Use 'dnf system-upgrade reboot' to start the upgrade.
The downloaded packages were saved in cache until the next successful
transaction.
But when I do
sudo dnf system-upgrade reboot
The system reboots, pauses near the end and says "preparing upgrade.
this may take a while". After about 3 minutes, it reboots again and I'm
still in F23.
There's no upgrade option on the boot screen, just the F23 kernels
--
-- Steve