login screen "greyed out", no mouse or keyboard inputs

[William Cunningham]

Unable to log into 18.04. Worked for about a month, then suddenly stopped. Boot appeared normal until login screen. Login screen appeared to be "greyed out", mouse and keyboard did not work. System clock appeared ok.

CTL-ALT-F2 did not open new terminal. CTL-ALT-F7 did not reset login screen or desktop.

Changed boot process to verbose. No errors observed on startup.

I've recovered a lot of Ubuntu machines, this problem is new to me.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CasperVersion: 1.394
CurrentDesktop: ubuntu:GNOME
Date: Sun Jul 8 13:02:50 2018
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[William Cunningham (wjcunning)]

Thanks for having a look. Could be a virus I suppose, although Sophos was running on the machine.

[Daniel van Vugt (vanvugt)]

When you say "greyed out", has the appearance changed? If so, can you please take a photo and attach it?

[Launchpad Janitor (janitor)]

[Expired for gdm3 (Ubuntu) because there has been no activity for 60 days.]