Attached the output as requested by Daniel van Vugt.
** Attachment added: "Output of journalctl -b-1 > prev_boot.txt"
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1799964/+attachment/5205732/+files/prev_boot.txt
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Public bug reported:
When I leave my machine for 10 minutes (default is 5) the screen blanks.
Unfortunately it doesn't come back after that, not by hitting a key or moving
the mouse.
I end up stopping the machine and turning it back on again.
May be related with my Vega 64 card/drivers?
Problem
Similar to #1799965
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https://bugs.launchpad.net/bugs/1799964
Title:
Ubuntu 18.10 After Blank Screen System Won't Come Back
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Public bug reported:
HP ZBook 15, 2014 model.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: libgl1-mesa-dri 18.0.0~rc4-1ubuntu3
ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
Uname: Linux 4.15.0-10-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
.proc.driver.nvidia.gp