Hmm, no problems related to it in that log, i915 would be more verbose.
I just noticed the trace in the subject was caused by a lid close/open
and is most likely not related. It would be worth trying this out to
rule out the Intel X driver, save this as /etc/X11/xorg.conf
Section "Device"
Identifier "Configured Video Device"
Driver "modesetting"
EndSection
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https://bugs.launchpad.net/bugs/1643566
Title:
[i915_bpo] Intermittent display outage with external monitor
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