Comment # 2 on bug 1226809 from Massimo Zaniboni

Many thanks for the extremely quick response. I double-checked, and it was a
mine fault. The problem is not much different from the signaled duplicated bug.

The "filesystem" repository were not enabled for refresh, because probably in
the past I messed with some configurations. So, there were an old version of
"zfs-kmp-default" package, not compatible with recent kernels.

I enabled again the repository, refreshed it, forced a dracut, removed a not
used kernel, for forcing an upadate of GRUB configuration, and reboot. Now it
is all working correctly.