Comment 2 for bug 1723733

I've experienced the same issue -- hang while editing using Libre Office Writer.

From dmesg:
[ 8821.754306] [drm] GPU HANG: ecode 9:0:0x86dffffd, in Xorg [1506], reason: Hang on render ring, action: reset
[ 8821.754346] drm/i915: Resetting chip after gpu hang
[ 8821.754439] [drm] RC6 on
[ 8821.770976] [drm] GuC firmware load skipped

I can provide a copy of my sys/class/drm/card0/error if that helps.