Had same frozen display problem with Ubuntu, most times coincident with a very
busy video adapter (MVP, Gimp, GMaps..)
Hardware: Laptop Acer Aspire 5735Z
Ubuntu 18.10
Linux 4.18.0-13-generic
Workaround:
sudo nano /usr/share/X11/xorg.conf.d/20-intel.conf
...add
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "AccelMethod" "sna"
Option "TearFree" "true"
Option "DRI" "3"
EndSection
Result: Still ok after several hours and tasks.
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https://bugs.launchpad.net/bugs/1798961
Title:
Random unrecoverable freezes on Ubuntu 18.10
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