See also bug 1723008. Although to avoid too much debate on personal design preferences I've assigned it to ubuntu-ux (Canonical design team). Hopefully they will have some time this cycle to assess the current theme.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1725546 Title: Disable noise on login screen background Status in gnome-shell package in Ubuntu: Triaged Bug description: An important factor in staying consistent with the overall aesthetics of the ubuntu design language would be to disable the use of the noise texture on gdm to provide a seamless transition from the plymouth boot splash onto the gdm login. Here is the override provided to fix the inconsistency in ubuntu.css under the gnome-shell themes directory: #lockDialogGroup { background: #2c001e !important; } ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-shell 3.26.1-0ubuntu4 ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4 Uname: Linux 4.13.0-16-generic x86_64 ApportVersion: 2.20.7-0ubuntu3 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Fri Oct 20 22:23:07 2017 DisplayManager: gdm3 InstallationDate: Installed on 2017-10-20 (1 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018) SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1725546/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp