I've moved all the old XMir bugs into the xorg-server source package
 and closed the old XMir Launchpad project. This means should you
need to file a bug against XMir just file against the xmir binary
$ ubuntu-bug xmir
Normal apport bug reports will go to the right place automatically.
On Wed, Jun 3, 2015 at 5:03 PM, Robert Ancell
> With xorg-server 1.17.1-0ubuntu4 we have a new XMir codebase. This is
> the code that was used for the MWC convergence demo .
> There is now a special XMir XServer (/usr/bin/Xmir) in the "xmir"
> package. The xserver-xorg-xmir package which had a plugin for
> /usr/bin/X is now an empty transitional package. "/usr/bin/X -mir" no
> longer works.
> The old XMir code is now no longer supported. At some point there will
> be a mass-closing of bugs - if you can reproduce an issue in the new
> XMir please re-open.
> Do to how cursors are now implemented you will currently not see
> cursors when running inside unity-system-compositor. This will be
> fixed .
> Unfortunately since the new XMir requires cutting edge Mir features we
> can't SRU this change to older releases. So if you want to play with
> XMir please run wily.
>  https://www.youtube.com/watch?v=c3PUYoa1c9M
>  https://code.launchpad.net/~robert-ancell/unity-system-compositor/new-xmir/+merge/260908
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