Upstream: https://gitlab.gnome.org/GNOME/gnome-shell/issues/185
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Please re-assign this bug report as needed:
When I was using Xwindows if the system ran out of memory one of the applications that was running was killed. Now that I am using Wayland instead the mouse and the keyboard stop responding and using a hotkey in order to switch to a different virtual console doesn't work any more.
My guess is that a process vital for wayland to work gets killed since wayland isn't obviously connected to the user experience in the view of many possible metrics.
My computer is using intel embedded graphics. But as gnome-shell currently tends to occupy an additional megabyte per second (there is a second but ticket on launchpad for that) and as I get the bug reports for a mathematics program that is able to find big solutions, if needed I frequently read "system becomes unresponsive" messages nowaday.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-session 3.28.0-0ubuntu1
Uname: Linux 4.16.0-041600rc6-lowlatency x86_64
ApportVersion: 2.20.9-0ubuntu1
Architecture: amd64
CurrentDesktop: GNOME
Date: Thu Mar 29 07:19:36 2018
EcryptfsInUse: Yes
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=de_DE.UTF-8
SHELL=/bin/bash
SourcePackage: gnome-session
UpgradeStatus: No upgrade log present (probably fresh install)
Are you sure you're using a Wayland session? Xorg is still the default in 18.04.
To check, try running 'xrandr' and tell us what the output is.