Fedora – F28 Upgrade on ARM64 – Fix for GPG Errors..
When doing a # dnf system-upgrade reboot on an ARM64 system you may encounter a stream of GPG errors, followed by reboot, without upgrade.
To fix this, simply import the F28 GPG key in advance, as done for Rawhide:
# rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-28-primary
After this, the system-upgrade should proceed correctly..
Robert Gadsdon. July 6, 2018
Did the upgrade. it flashed some screen distortions, went through the whole process and crashed on cleanup. now Fedora does not startup at all now matter which kernel you choose or if you choose rescue or user level 1 logins. no way to apply this workaround. F27 definitely became very unstable in the latter kernels for AMD 64bit. Going to try Manjaro after I rescue my data. Been hearing good reports for it.