I can confirm this bug as of tuesday, May 21 1400. Here's my complete terminal output, showing that everything should work: After ppa added: paul@localpc3:~$ cat /etc/apt/sources.list.d/mir-team-staging-raring.list deb http://ppa.launchpad.net/mir-team/staging/ubuntu raring main # deb-src http://ppa.launchpad.net/mir-team/staging/ubuntu raring main paul@localpc3:~$ sudo apt-get update Hit http://us.archive.ubuntu.com raring Release.gpg Get:1 http://us.archive.ubuntu.com raring-updates Release.gpg [933 B] Hit http://us.archive.ubuntu.com raring-backports Release.gpg Hit http://us.archive.ubuntu.com raring Release Get:2 http://ppa.launchpad.net raring Release.gpg [316 B] Get:3 http://us.archive.ubuntu.com raring-updates Release [40.8 kB] Get:4 http://security.ubuntu.com raring-security Release.gpg [933 B] Get:5 http://ppa.launchpad.net raring Release [9,743 B] Hit http://us.archive.ubuntu.com raring-backports Release Get:6 http://security.ubuntu.com raring-security Release [40.8 kB] Hit http://us.archive.ubuntu.com raring/main Sources Hit http://us.archive.ubuntu.com raring/restricted Sources Hit http://us.archive.ubuntu.com raring/universe Sources Hit http://us.archive.ubuntu.com raring/multiverse Sources Hit http://us.archive.ubuntu.com raring/main i386 Packages Get:7 http://ppa.launchpad.net raring/main i386 Packages [15.4 kB] Hit http://us.archive.ubuntu.com raring/restricted i386 Packages Hit http://us.archive.ubuntu.com raring/universe i386 Packages Hit http://us.archive.ubuntu.com raring/multiverse i386 Packages Get:8 http://security.ubuntu.com raring-security/main Sources [9,564 B] Hit http://us.archive.ubuntu.com raring/main Translation-en Get:9 http://security.ubuntu.com raring-security/restricted Sources [14 B] Hit http://us.archive.ubuntu.com raring/multiverse Translation-en Get:10 http://security.ubuntu.com raring-security/universe Sources [1,982 B] Hit http://us.archive.ubuntu.com raring/restricted Translation-en Get:11 http://security.ubuntu.com raring-security/multiverse Sources [697 B] Hit http://us.archive.ubuntu.com raring/universe Translation-en Get:12 http://us.archive.ubuntu.com raring-updates/main Sources [14.0 kB] Get:13 http://security.ubuntu.com raring-security/main i386 Packages [34.5 kB] Get:14 http://us.archive.ubuntu.com raring-updates/restricted Sources [14 B] Get:15 http://us.archive.ubuntu.com raring-updates/universe Sources [9,167 B] Get:16 http://us.archive.ubuntu.com raring-updates/multiverse Sources [697 B] Get:17 http://us.archive.ubuntu.com raring-updates/main i386 Packages [42.0 kB] Get:18 http://security.ubuntu.com raring-security/restricted i386 Packages [14 B] Get:19 http://security.ubuntu.com raring-security/universe i386 Packages [9,924 B] Get:20 http://us.archive.ubuntu.com raring-updates/restricted i386 Packages [14 B] Get:21 http://us.archive.ubuntu.com raring-updates/universe i386 Packages [29.9 kB] Get:22 http://security.ubuntu.com raring-security/multiverse i386 Packages [1,389 B] Get:23 http://us.archive.ubuntu.com raring-updates/multiverse i386 Packages [1,389 B] Ign http://ppa.launchpad.net raring/main Translation-en_US Get:24 http://us.archive.ubuntu.com raring-updates/main Translation-en [17.3 kB] Hit http://security.ubuntu.com raring-security/main Translation-en Ign http://ppa.launchpad.net raring/main Translation-en Hit http://us.archive.ubuntu.com raring-updates/multiverse Translation-en Hit http://security.ubuntu.com raring-security/multiverse Translation-en Hit http://us.archive.ubuntu.com raring-updates/restricted Translation-en Get:25 http://us.archive.ubuntu.com raring-updates/universe Translation-en [16.8 kB] Hit http://security.ubuntu.com raring-security/restricted Translation-en Hit http://us.archive.ubuntu.com raring-backports/main Sources Hit http://us.archive.ubuntu.com raring-backports/restricted Sources Hit http://us.archive.ubuntu.com raring-backports/universe Sources Hit http://us.archive.ubuntu.com raring-backports/multiverse Sources Hit http://us.archive.ubuntu.com raring-backports/main i386 Packages Hit http://us.archive.ubuntu.com raring-backports/restricted i386 Packages Hit http://us.archive.ubuntu.com raring-backports/universe i386 Packages Hit http://us.archive.ubuntu.com raring-backports/multiverse i386 Packages Hit http://security.ubuntu.com raring-security/universe Translation-en Hit http://us.archive.ubuntu.com raring-backports/main Translation-en Hit http://us.archive.ubuntu.com raring-backports/multiverse Translation-en Hit http://us.archive.ubuntu.com raring-backports/restricted Translation-en Hit http://us.archive.ubuntu.com raring-backports/universe Translation-en Ign http://security.ubuntu.com raring-security/main Translation-en_US Ign http://security.ubuntu.com raring-security/multiverse Translation-en_US Ign http://security.ubuntu.com raring-security/restricted Translation-en_US Ign http://security.ubuntu.com raring-security/universe Translation-en_US Ign http://us.archive.ubuntu.com raring/main Translation-en_US Ign http://us.archive.ubuntu.com raring/multiverse Translation-en_US Ign http://us.archive.ubuntu.com raring/restricted Translation-en_US Ign http://us.archive.ubuntu.com raring/universe Translation-en_US Ign http://us.archive.ubuntu.com raring-updates/main Translation-en_US Ign http://us.archive.ubuntu.com raring-updates/multiverse Translation-en_US Ign http://us.archive.ubuntu.com raring-updates/restricted Translation-en_US Ign http://us.archive.ubuntu.com raring-updates/universe Translation-en_US Ign http://us.archive.ubuntu.com raring-backports/main Translation-en_US Ign http://us.archive.ubuntu.com raring-backports/multiverse Translation-en_US Ign http://us.archive.ubuntu.com raring-backports/restricted Translation-en_US Ign http://us.archive.ubuntu.com raring-backports/universe Translation-en_US Fetched 298 kB in 5s (53.9 kB/s) Reading package lists... Done Create preferences: paul@localpc3:~$ cat /etc/apt/preferences.d/50-pin-mir.pref Package: * Pin: origin "private-ppa.launchpad.net" Pin-Priority: 1001 Package: * Pin: release o=LP-PPA-mir-team-staging Pin-Priority: 1002 paul@localpc3:~$ sudo apt-get install mir-demos Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: libboost-program-options1.49.0 libboost-system1.49.0 libgflags2 libgoogle-glog0 libmirclient0 libmirprotobuf0 libmirserver0 The following NEW packages will be installed: libboost-program-options1.49.0 libboost-system1.49.0 libgflags2 libgoogle-glog0 libmirclient0 libmirprotobuf0 libmirserver0 mir-demos 0 upgraded, 8 newly installed, 0 to remove and 18 not upgraded. Need to get 0 B/1,163 kB of archives. After this operation, 3,644 kB of additional disk space will be used. Do you want to continue [Y/n]? Selecting previously unselected package libgflags2. (Reading database ... 200441 files and directories currently installed.) Unpacking libgflags2 (from .../libgflags2_2.0-1_i386.deb) ... Selecting previously unselected package libgoogle-glog0. Unpacking libgoogle-glog0 (from .../libgoogle-glog0_0.3.2-4ubuntu1_i386.deb) ... Selecting previously unselected package libboost-program-options1.49.0. Unpacking libboost-program-options1.49.0 (from .../libboost-program-options1.49.0_1.49.0-3.2ubuntu1_i386.deb) ... Selecting previously unselected package libboost-system1.49.0. Unpacking libboost-system1.49.0 (from .../libboost-system1.49.0_1.49.0-3.2ubuntu1_i386.deb) ... Selecting previously unselected package libmirprotobuf0. Unpacking libmirprotobuf0 (from .../libmirprotobuf0_0.0.3bzr692raring0_i386.deb) ... Selecting previously unselected package libmirclient0. Unpacking libmirclient0 (from .../libmirclient0_0.0.3bzr692raring0_i386.deb) ... Selecting previously unselected package libmirserver0. Unpacking libmirserver0 (from .../libmirserver0_0.0.3bzr692raring0_i386.deb) ... Selecting previously unselected package mir-demos. Unpacking mir-demos (from .../mir-demos_0.0.3bzr692raring0_i386.deb) ... Setting up libgflags2 (2.0-1) ... Setting up libgoogle-glog0 (0.3.2-4ubuntu1) ... Setting up libboost-program-options1.49.0 (1.49.0-3.2ubuntu1) ... Setting up libboost-system1.49.0 (1.49.0-3.2ubuntu1) ... Setting up libmirprotobuf0 (0.0.3bzr692raring0) ... Setting up libmirclient0 (0.0.3bzr692raring0) ... Setting up libmirserver0 (0.0.3bzr692raring0) ... Setting up mir-demos (0.0.3bzr692raring0) ... Processing triggers for libc-bin ... ldconfig deferred processing now taking place paul@localpc3:~$ sudo apt-get dist-upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done The following packages have been kept back: lightdm The following packages will be upgraded: libegl1-mesa libegl1-mesa-drivers libgbm1 libgl1-mesa-dev libgl1-mesa-dri libgl1-mesa-glx libglapi-mesa libgles2-mesa liblightdm-gobject-1-0 libopenvg1-mesa libxatracker1 mesa-common-dev xserver-common xserver-xorg-core xserver-xorg-video-intel xserver-xorg-video-nouveau xserver-xorg-video-radeon 17 upgraded, 0 newly installed, 0 to remove and 1 not upgraded. Need to get 0 B/68.2 MB of archives. After this operation, 212 MB of additional disk space will be used. Do you want to continue [Y/n]? (Reading database ... 200495 files and directories currently installed.) Preparing to replace libgbm1:i386 9.1.1-0ubuntu3 (using .../libgbm1_9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71_i386.deb) ... Unpacking replacement libgbm1:i386 ... Preparing to replace libgles2-mesa:i386 9.1.1-0ubuntu3 (using .../libgles2-mesa_9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71_i386.deb) ... Unpacking replacement libgles2-mesa:i386 ... Preparing to replace xserver-common 2:1.13.3-0ubuntu6 (using .../xserver-common_2%3a1.13.3-0ubuntu9+xmir1~raring1_all.deb) ... Unpacking replacement xserver-common ... Preparing to replace libgl1-mesa-dri:i386 9.1.1-0ubuntu3 (using .../libgl1-mesa-dri_9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71_i386.deb) ... Unpacking replacement libgl1-mesa-dri:i386 ... Preparing to replace xserver-xorg-core 2:1.13.3-0ubuntu6 (using .../xserver-xorg-core_2%3a1.13.3-0ubuntu9+xmir1~raring1_i386.deb) ... Unpacking replacement xserver-xorg-core ... Preparing to replace libgl1-mesa-dev 9.1.1-0ubuntu3 (using .../libgl1-mesa-dev_9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71_i386.deb) ... Unpacking replacement libgl1-mesa-dev ... Preparing to replace mesa-common-dev 9.1.1-0ubuntu3 (using .../mesa-common-dev_9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71_i386.deb) ... Unpacking replacement mesa-common-dev ... Preparing to replace libgl1-mesa-glx:i386 9.1.1-0ubuntu3 (using .../libgl1-mesa-glx_9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71_i386.deb) ... Unpacking replacement libgl1-mesa-glx:i386 ... dpkg: warning: unable to delete old directory '/usr/lib/i386-linux-gnu/xorg': Directory not empty Preparing to replace libegl1-mesa-drivers:i386 9.1.1-0ubuntu3 (using .../libegl1-mesa-drivers_9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71_i386.deb) ... Unpacking replacement libegl1-mesa-drivers:i386 ... Preparing to replace libglapi-mesa:i386 9.1.1-0ubuntu3 (using .../libglapi-mesa_9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71_i386.deb) ... Unpacking replacement libglapi-mesa:i386 ... Preparing to replace libopenvg1-mesa:i386 9.1.1-0ubuntu3 (using .../libopenvg1-mesa_9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71_i386.deb) ... Unpacking replacement libopenvg1-mesa:i386 ... Preparing to replace libegl1-mesa:i386 9.1.1-0ubuntu3 (using .../libegl1-mesa_9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71_i386.deb) ... Unpacking replacement libegl1-mesa:i386 ... Preparing to replace libxatracker1:i386 9.1.1-0ubuntu3 (using .../libxatracker1_9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71_i386.deb) ... Unpacking replacement libxatracker1:i386 ... Preparing to replace liblightdm-gobject-1-0 1.6.0-0ubuntu2.1 (using .../liblightdm-gobject-1-0_1.7.0bzr1604raring0_i386.deb) ... Unpacking replacement liblightdm-gobject-1-0 ... Preparing to replace xserver-xorg-video-intel 2:2.21.6-0ubuntu4 (using .../xserver-xorg-video-intel_2%3a2.21.6-0ubuntu4+xmir5785+2~raring1_i386.deb) ... Unpacking replacement xserver-xorg-video-intel ... Preparing to replace xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1 (using .../xserver-xorg-video-nouveau_1%3a1.0.7-0ubuntu1+xmir2317~raring1_i386.deb) ... Unpacking replacement xserver-xorg-video-nouveau ... Preparing to replace xserver-xorg-video-radeon 1:7.1.0-0ubuntu2 (using .../xserver-xorg-video-radeon_1%3a7.1.0-0ubuntu2+xmir2504~raring1_i386.deb) ... Unpacking replacement xserver-xorg-video-radeon ... Processing triggers for man-db ... Setting up libgbm1:i386 (9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71) ... Setting up libglapi-mesa:i386 (9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71) ... Setting up libgles2-mesa:i386 (9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71) ... Setting up xserver-common (2:1.13.3-0ubuntu9+xmir1~raring1) ... Setting up libgl1-mesa-dri:i386 (9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71) ... Setting up xserver-xorg-core (2:1.13.3-0ubuntu9+xmir1~raring1) ... Setting up mesa-common-dev (9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71) ... Setting up libgl1-mesa-glx:i386 (9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71) ... Setting up libgl1-mesa-dev (9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71) ... Setting up libegl1-mesa:i386 (9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71) ... Setting up libopenvg1-mesa:i386 (9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71) ... Setting up libegl1-mesa-drivers:i386 (9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71) ... Setting up libxatracker1:i386 (9.2~git20130515.392f6cfc-0ubuntu0+mir1-jenkins71) ... Setting up liblightdm-gobject-1-0 (1.7.0bzr1604raring0) ... Setting up xserver-xorg-video-intel (2:2.21.6-0ubuntu4+xmir5785+2~raring1) ... Setting up xserver-xorg-video-nouveau (1:1.0.7-0ubuntu1+xmir2317~raring1) ... Setting up xserver-xorg-video-radeon (1:7.1.0-0ubuntu2+xmir2504~raring1) ... Processing triggers for libc-bin ... ldconfig deferred processing now taking place lightdm won't install: paul@localpc3:~$ apt-cache policy lightdm lightdm: Installed: 1.6.0-0ubuntu2.1 Candidate: 1.7.0bzr1604raring0 Version table: 1.7.0bzr1604raring0 0 1002 http://ppa.launchpad.net/mir-team/staging/ubuntu/ raring/main i386 Packages *** 1.6.0-0ubuntu2.1 0 500 http://us.archive.ubuntu.com/ubuntu/ raring-updates/main i386 Packages 100 /var/lib/dpkg/status 1.6.0-0ubuntu2 0 500 http://us.archive.ubuntu.com/ubuntu/ raring/main i386 Packages Can't even select it: paul@localpc3:~$ sudo apt-get install lightdm=1.7.0bzr1604raring0 Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: lightdm : Depends: unity-system-compositor but it is not going to be installed E: Unable to correct problems, you have held broken packages.