Frédéric Bron wrote:
did that:
$ dnf install plasma-workspace-5.8.6 kwin-5.8.6
--enablerepo=updates-testing
still black screen.
Do you use 3rd-party (video) drivers? If so, may be selinux-policy issue:
https://bodhi.fedoraproject.org/updates/FEDORA-2017-e06f91350b
-- rex