This is not an answer to bug report but rather a comment and alternate suggestion:
Since I do not need a screen saver (graphics) but do want a screen locker I did the following for my Fedora 27 install.

Remove xscreensaver then set power settings in xfce tool:
 # dnf autoremove xscreensaver
 xfce4-power-manager-settings

Add simple screen locker & check settings:
 # dnf install slock (read man page to finish config)
 Applications > Settings > Session & Startup > Advanced tab:
 Y = Lock screen before sleep
 Applications > Settings > Power Manager > System tab:
 Y = Lock screen when system is going to sleep
 +++
Press Ctrl+Alt+l which is mapped to the xflock4 script which looks for and runs slock.
After using slock to lock the screen, type your password the [Enter] to unlock. 
There is no password dialogue box.  While typing your password the screen will be blue.
If an incorrect password is typed the screen turn red ... so try again.


On Sun, Feb 11, 2018 at 8:35 PM, ToddAndMargo <ToddAndMargo@zoho.com> wrote:
Dear Fedora Xfce,

Any work around to this bug?
https://bugzilla.redhat.com/show_bug.cgi?id=1544297


HOW CAN I LIVE WITHOUT MY BOUNCING COWS !!???

Fedora 27, x64 installed from Fedora-Xfce-Live-x86_64-27-1.6.iso
Xfce 4.12
xscreensaver-gl-base-5.38-1.fc27.x86_64
xscreensaver-5.38-1.fc27.x86_64
xscreensaver-extras-base-5.38-1.fc27.x86_64
xscreensaver-gl-extras-5.38-1.fc27.x86_64
xfce4-screenshooter-plugin-1.8.2-9.fc27.x86_64
xscreensaver-base-5.38-1.fc27.x86_64
xscreensaver-extras-5.38-1.fc27.x86_64
xfce4-screenshooter-1.8.2-9.fc27.x86_64

$ ps aux | grep [s]creen
todd      5249  0.0  0.0 184156  5696 ?        S    16:20   0:00 xscreensaver -no-splash

I can fire up Screen Saver preference, I can preview my screen saver, I set it for five minutes, no screen saver.  Restarting the daemon has no effect.

How do I get my screen saver to work. It does work on other machines running Xfce and Fedora 26.

Reproduces on three machines.

Many thanks,
-T
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