Power management and XFCE under Fedora 25

The gnome shell has been crashing on me more regularly lately. XFCE is a good and fast more tradional desktop, but, from past experiences, it does not play well with power management if you only install it via

dnf install @xfce-desktop-environment

My typical experience is a black screen after resuming from suspend (sometimes, not always), or hibernate (always) and most of the time I end up just rebooting. It turns out this is all caused by the interaction between the gdm login daemon and xfce. Moving to the lightdm login daemon instead fixes those issues for Fedora 25:

systemctl disable gdm
systemctl enable lightdm
systemctl stop gdm
systemctl start lightdm
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