** Changed in: gnome-shell (Ubuntu)
       Status: Incomplete => New

** Changed in: mutter (Ubuntu)
       Status: Incomplete => New

** Description changed:

+ https://gitlab.gnome.org/GNOME/mutter/issues/175
+ 
+ ---
+ 
  On Ubuntu 18.04, running nvidia-390 driver (on a GTX 1080), and gnome
  shell 3.28.1.
  
  I have a 3 monitor setup. When I open a terminal in the middle window and 
some other window, like nautilus on the left, and quickly drag the nautilus 
window to the right, covering the terminal, and back without releasing the 
mouse, a flickering ghost of the window remains on the terminal for about a 
minute or so.
- --- 
+ ---
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  DisplayManager: gdm3
  DistroRelease: Ubuntu 18.04
  GsettingsChanges:
-  b'org.gnome.shell' b'favorite-apps' redacted by apport
-  b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
-  b'org.gnome.desktop.interface' b'clock-format' b"'12h'"
+  b'org.gnome.shell' b'favorite-apps' redacted by apport
+  b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
+  b'org.gnome.desktop.interface' b'clock-format' b"'12h'"
  InstallationDate: Installed on 2018-05-10 (15 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  NonfreeKernelModules: nvidia_modeset nvidia
  Package: mutter
  PackageArchitecture: amd64
  ProcEnviron:
-  TERM=xterm-256color
-  PATH=(custom, no user)
-  XDG_RUNTIME_DIR=<set>
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  TERM=xterm-256color
+  PATH=(custom, no user)
+  XDG_RUNTIME_DIR=<set>
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
  Tags:  bionic
  Uname: Linux 4.15.0-22-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True

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Desktop Bugs, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/1770731

Title:
  [nvidia] multimonitor ghostly flickering display artifacts

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