Running `dnf upgrade` to install all available and resolvable package updates from a graphical session is apparently considered risky, as I recently learned from a discussion on the Fedeora Devel mailing list...
A large sub-thread in this discussion is dominated by users who were surprised and confused to be learning about this potential problem for the first time. If experts really do consider running `dnf upgrade` (or equivalent commands) in a graphical session to be such a big risk, it should be documented. As far as I know, this potential problem isn't mentioned in the dnf man page, and I'm having a hard time finding the recommendation in the Fedora Wiki.
Thanks for the report, we can document that.
This bug appears to have been reported against 'rawhide' during the Fedora 27 development cycle.
Changing version to '27'.
This message is a reminder that Fedora 27 is nearing its end of life.
On 2018-Nov-30 Fedora will stop maintaining and issuing updates for
Fedora 27. It is Fedora's policy to close all bug reports from releases
that are no longer maintained. At that time this bug will be closed as
EOL if it remains open with a Fedora 'version' of '27'.
Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version'
to a later Fedora version.
Thank you for reporting this issue and we are sorry that we were not
able to fix it before Fedora 27 is end of life. If you would still like
to see this bug fixed and are able to reproduce it against a later version
of Fedora, you are encouraged change the 'version' to a later Fedora
version prior this bug is closed as described in the policy above.
Although we aim to fix as many bugs as possible during every release's
lifetime, sometimes those efforts are overtaken by events. Often a
more recent Fedora release includes newer upstream software that fixes
bugs or makes them obsolete.
There's still nothing in the manpage advising users do full system updates either in a text-mode session or TTY, or else to use GNOME Software to install the updates offline instead. Thanks.
This bug appears to have been reported against 'rawhide' during the Fedora 30 development cycle.
Changing version to '30.