This patch seems to fix it:
https://gitlab.gnome.org/GNOME/gdm/merge_requests/32
** No longer affects: mutter (Ubuntu)
** Changed in: gdm3 (Ubuntu)
Status: New => Triaged
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https://bugs.launchpad.net/bugs/1786883
Title:
[regression] Login screen flickers to black a few times on boot and
then finally settles on using Xorg instead of Wayland. No Wayland
login option.
Status in gdm3 package in Ubuntu:
Triaged
Bug description:
https://gitlab.gnome.org/GNOME/mutter/issues/264
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The cosmic login screen flickers to black a few times on boot and then
finally settles on using Xorg instead of Wayland.
I can tell because from ssh user 'gdm' is running:
/usr/lib/xorg/Xorg vt2 -displayfd 3 -auth /run/user/121/gdm/Xauthority
-background none -noreset -keeptty -verbose 3
and not the usual Xwayland. Also the login screen offers no choice of
Xorg or Wayland sessions.
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: gdm3 3.29.91-1ubuntu1
ProcVersionSignature: Ubuntu 4.17.0-6.7-generic 4.17.9
Uname: Linux 4.17.0-6-generic x86_64
ApportVersion: 2.20.10-0ubuntu7
Architecture: amd64
Date: Tue Aug 14 11:41:31 2018
InstallationDate: Installed on 2018-05-26 (79 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Alpha amd64 (20180525)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_AU.UTF-8
SHELL=/bin/bash
SourcePackage: gdm3
UpgradeStatus: No upgrade log present (probably fresh install)
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