Unfortunately original problem is still present after removal of light-
locker.
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https://bugs.launchpad.net/bugs/1918940
Title:
Screen goes black randomly after upgrade from Xubuntu 18.
Hey Sean,
Thanks for you concern!
1. Yes, I had. Removed light-locker today. Since the problem happens
only a few times a day it might take a while until I notice if there's a
change.
2.
$ inxi -G
Graphics: Device-1: Intel Haswell-ULT Integrated Graphics driver: i915 v:
kernel
There's a few possibilities:
1. Check if you have both light-locker and xfce4-screensaver installed. If you
do, you should be able to safely uninstall light-locker.
2. It could be related to graphics. Please run `inxi -G` and provide the output
so we can identify your graphics card and driver.