This is specifically occurring on Yosemite Macs that have been NetRestored. Initial login works fine. However, when restarting the Mac or logging out of the user, a black screen appears with only the mouse cursor there. (Please note this is on logout, not login. I'm quite familiar with the login issue.)
I cannot even get out of it by sending a Restart (Lose Changes) command through ARD. Only a manual force shut down solves the issue.
In the past, I've removed the /Library/Preferences/com.apple.loginwindow.plist file and it's solved the issue. However, it's still occurring now. Any suggestions?