After installing the updated xserver-xorg-video-intel, this bug got fixed, but made the "text disappearing after unsuspend" bug much more frequent. This other bug is described at https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1573959
After installing the updated xserver- xorg-video- intel, this bug got fixed, but made the "text disappearing after unsuspend" bug much more frequent. This other bug is described at https:/ /bugs.launchpad .net/ubuntu/ +source/ xserver- xorg-video- intel/+ bug/1573959