** Tags added: a11y -- You received this bug notification because you are a member of LightDM Gtk+ Greeter Development Team, which is subscribed to lightdm-gtk- greeter in Ubuntu. https://bugs.launchpad.net/bugs/1670933
Title: [PATCH] Accessibility partly broken due to X root window being kept from login session. Status in LightDM GTK+ Greeter: Fix Released Status in lightdm-gtk-greeter package in Ubuntu: Fix Released Status in unity-greeter package in Ubuntu: Fix Released Bug description: affects lightdm Lightdm version 1.21.5, in 17.04. Some components of the Unity and Mate desktops are currently not accessible when logging in using lightdm. So far I've tested and reproduced this problem with both unity-greeter, and lightdm-gtk-greeter, so I suspect it is what I mentioned in the title, i.e the X root window is kept around. At-spi gets loaded in the greeter for use with Orca. At-spi ads a property atom, AT_SPI_BUS, to the root X window to allow software to be able to find the accessibility bus. If my understanding is correct, this root window is kept around for the user login session. What then happens is software either using Qt or Gtk loads its accessibility support code, which in turn looks for the AT_SPI_BUS property. Normally on session load, this property is not present, at which point the support code then connects to org.a11y.bus, which in turn via systemd loads the at-spi bus launcher and registry to respond to the bus activation/request. At-spi adds the AT_SPI_BUS property to the X root window at load. However the AT_SPI_BUS property is hanging around from the greeter session, which is confusing software. At-spi only then gets loaded from /etc/xdg/autostart/at-spi-dbus-bus.desktop by the mate or gnome session binaries, but this happens after unity-panel-service and mate- panel are loaded. As such they are inaccessible for the session, or until the user kills them and they get reloaded. To manage notifications about this bug go to: https://bugs.launchpad.net/lightdm-gtk-greeter/+bug/1670933/+subscriptions -- Mailing list: https://launchpad.net/~lightdm-gtk-greeter-team Post to : lightdm-gtk-greeter-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~lightdm-gtk-greeter-team More help : https://help.launchpad.net/ListHelp
