I had the same issue on an Acer Aspire One with a fresh Lubuntu 17.10.1 
install. Trying to prevent the system from continuously going to sleep I set 
"HandleSuspendKey" and "HandleLidSwitch" to ignore in /etc/systemd/login.conf. 
After that the screen problem appeared.
When I commented out the HandleSuspendKey again, everything worked fine!

Hope that helps

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  Bug in Kernel 4.13 : Intel Mobile Graphics 945 shows 80 % black screen

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