For gnome-shell, this has worked for at least the past year. Probably longer.
By "this" I mean selecting gnome-tweak-tool > Windows > Window Action Key = Alt works. The fact that Alt is not the default is a different issue. See bug 1713650 instead. ** Changed in: gnome-shell (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to metacity in Ubuntu. https://bugs.launchpad.net/bugs/1299836 Title: Alt+mouse move doesn't drag window any more Status in gnome-shell package in Ubuntu: Fix Released Status in metacity package in Ubuntu: Confirmed Bug description: Under Ubuntu 14.04 beta, in Gnome Flashback Session with Metacity, the Alt hotkey doesn't work anymore for moving windows. In Ubuntu 12.04 pressing Alt key and clicking into a window could be used to move the window; this doesn't work anymore. The shortcut key can be changed away from Alt to Super (Windows) key, eg. using gnome-tweak-tool (Window -> Window Action Key). Interestingly, when configuring Super key, it actually works when pressing the Super key; but when configuring the Alt key it doesn't work. The key can also be changed directly in dconf-editor, under org.gnome.desktop.wm.preferences.mouse-button-modifier. This allows to set other keys than Alt and Super; and eg. configuring <Ctrl> actually makes the Control key usable as Window Action Key; but again when configuring <Alt> the Alt key cannot be used for window movement. This also affects the other actions available via the window action key (window resizing, and opening window context menu). This is with Ubuntu 14.04 beta (x86_64), in Virtualbox, with metacity 1:2.34.13-0ubuntu4. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1299836/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp