Update: I've not hit this bug after 5 days now, and I need to restart to apply security updates.
To recap, the fix was to add the following to /etc/rc.local :
echo auto > /sys/class/drm/card0/device/power_profile
Update: I've not hit this bug after 5 days now, and I need to restart to apply security updates.
To recap, the fix was to add the following to /etc/rc.local :
echo auto > /sys/class/ drm/card0/ device/ power_profile