I had the same problem following an in-place upgrade from Zesty+Unity to Artful. With the possible exception that my mouse pointer didn't even change to "the arrow, tempting you" when hovering over the window border.
I did an apt upgrade, an apt uninstall of *unity*, and a reboot. I can now resize snapped windows. For reference I currently have mutter 3.26.1, and libgtk+3.0 3.22.21.0ubuntu1. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to gtk+3.0 in Ubuntu. https://bugs.launchpad.net/bugs/1719047 Title: Unable to resize window after snapped to half screen. Status in gtk+3.0 package in Ubuntu: Fix Committed Status in mutter package in Ubuntu: Fix Committed Bug description: Unable to resize window after snapped to half screen. You can see the arrow, tempting you to just try and resize the window at the edge, but it's just toying with you. More info https://bugzilla.gnome.org/show_bug.cgi?id=645153 This used to work in z+Unity ;(. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-shell 3.26.0-0ubuntu1 ProcVersionSignature: Ubuntu 4.13.0-11.12-generic 4.13.1 Uname: Linux 4.13.0-11-generic x86_64 ApportVersion: 2.20.7-0ubuntu1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Fri Sep 22 19:15:17 2017 DisplayManager: gdm3 GsettingsChanges: b'org.gnome.shell' b'favorite-apps' b"['google-chrome-beta.desktop', 'org.gnome.Nautilus.desktop', 'org.gnome.Software.desktop', 'gnome-control-center.desktop', 'keepassx.desktop', 'chrome-knipolnnllmklapflnccelgolnpehhpl-Default.desktop', 'terminator.desktop', 'org.gnome.Calculator.desktop']" b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'" b'org.gnome.desktop.interface' b'text-scaling-factor' b'1.2' b'org.gnome.desktop.interface' b'show-battery-percentage' b'true' b'org.gnome.desktop.interface' b'clock-show-date' b'true' InstallationDate: Installed on 2016-04-25 (515 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: gnome-shell UpgradeStatus: Upgraded to artful on 2017-09-09 (13 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gtk+3.0/+bug/1719047/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
