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[Launchpad Bug Tracker <1293944@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package mir - 0.8.0+14.10.20141010-0ubuntu1

---------------
mir (0.8.0+14.10.20141010-0ubuntu1) utopic; urgency=medium

  [ Daniel van Vugt ]
  * New upstream release 0.8.0 (https://launchpad.net/mir/+milestone/0.8.0)
    - Enhancements:
      . Less sensitivity to ABI breaks - many headers unused by external
        projects are now hidden and not installed by -dev packaes. If you
        require any headers that are missing, just ask.
      . Touchspots: --enable-touchspots to servers; visually shows touch
        locations (warning: This affects performance LP: #1373692).
      . Client performance reporting: Any Mir client can now get accurate
        performance information (frame rate, render time, buffer lag etc)
        logged to stdout. Just set env MIR_CLIENT_PERF_REPORT=log
      . Further improved touch responsiveness, with less lag and smoother
        scrolling (so long as you don't enable touchspots).
      . Slightly faster builds using precompiled headers.
      . Turn hardware overlays on by default. When in use, this halves the
        CPU usage of a Mir server. Already enabled in unity-system-compositor.
      . More scripting to detect ABI breaks.
      . Improved src/ tree consistency (renamed "src/shared" to "src/common").
      . Improved fatal signal design: Changed from SIGTERM to SIGHUP delivered
        to clients on unexpected server disconnection.
      . Improved library/package design to allow concurrent installations
        of different Mir versions without conflicts.
      . Fd reception code is now common to client and server.
    - ABI summary: Servers need rebuilding, but clients do not;
      . Mirclient ABI unchanged at 8
      . Mircommon ABI bumped to 2
      . Mirplatform ABI bumped to 3
      . Mirserver ABI bumped to 26
    - API changes between Mir 0.7 and 0.8:
      . Lots of headers removed from the public SDK! We have only hidden
        headers not known to be used by any known projects. Please let us
        know if anything is missing - https://bugs.launchpad.net/mir/+filebug
      . graphics::Platform - interface changed significantly.
      . Lots of server API changes to support touchspots.
      . File descriptors now passed as type Fd instead of int32_t.
    - Bug fixes:
      . [regression] Mir deb packages with versioned names cannot be installed
        simultaneously any more (LP: #1293944)
      . A frozen client can hang the whole server (LP: #1350207)
      . QtMir FTBFS: fatal error: mir/input/input_channel.h: No such file or
        directory (LP: #1365934)
      . [regression] platform-api fails to build against Mir 0.8 (LP: #1368354)
      . Mir FTBFS with gcc 4.9.1-14 (utopic update):
        auto_unblock_thread.h:44:46: error: no matching function for call to
        ‘std::thread::thread(<brace-enclosed initializer list>)’ (LP: #1369389)
      . [regression] Compositing is jerky and stutters during touch events
        (LP: #1372850)
      . unit test fails: AndroidInputReceiverSetup.slow_raw_input_doesnt_cause_
        frameskipping (LP: #1373826)
      . intermittent hang in TestClientInput (LP: #1338612)
      . TestClientInput.scene_obscure_motion_events_by_stacking fails
        intermittently (LP: #1361757)
      . [regression] First frame is composited as black (even though the client
        has provided a non-black frame) (LP: #1362444)
      . Some mali drivers crash after repeatedly creating/destroying the mir
        compositor threads (LP: #1362841)
      . [android] SIGTERM to server with connected client causes crash
        (LP: #1364637)
      . [regression] acceptance tests fails in
        ServerDisconnect.causes_client_to_terminate_by_default (LP: #1364772)
      . [regression] symbol lookup error:
        /usr/lib/arm-linux-gnueabihf/libmirserver.so.24: undefined symbol:
        _ZTIN7android7RefBaseE (libmirserver 0.6.1 doesn't work with
        libmircommon 0.7.0) (LP: #1364890)
      . [regression] Mir FTBFS with g++-4.8 [error: ISO C++ forbids casting
        between pointer-to-function and pointer-to-object] (LP: #1366134)
      . Intermittent CI failure in DemoPrivateProtobuf.client_calls_server
        (LP: #1367353)
      . Overly strict libmirplatform* dependencies are blocking CI
        (LP: #1370866)
      . [regression] mir demo servers segfault on shutdown (LP: #1371619)
      . Nested server crashes with SIGSEGV on shutdown in eglDestroyContext()
        (LP: #1372276)
      . [regression] Moving/resizing clients in a nested server is very
        jerky/stuttery (LP: #1372300)
      . [regression] Bypass/overlays are toggling constantly (LP: #1373689)
      . [regression] Mir server uses too much CPU during touch scrolling
        (LP: #1373809)
      . Intermittent test failures in TestClientCursorAPI.* (LP: #1342567)
      . clang emits lots of warnings about lttng headers (LP: #1348472)
      . [enhancement] Draw input event location (LP: #1323522)
      . demo shell: Keep colours consistent, regardless of the physical pixel
        format of your framebuffer (LP: #1375660)
      . tests: Fix SharedLibraryProber test runs on i386. (LP: #1375829)
      . Touchspots rendered as squares on some devices (LP: #1373698)
      . The headers needed to use features shown in the acceptance tests are
        not published (LP: #1375301)
      . update-all-ABI-sha1sums.sh and install_on_android.sh are no longer
        executable. (LP: #1376547)
      . Fix arm64 package by adding arm64 to the shared library prober test.
        (LP: #1379478)
 -- Ubuntu daily release <ps-jenkins@xxxxxxxxxxxxxxxxxxx>   Fri, 10 Oct 2014 14:01:26 +0000

** Changed in: mir (Ubuntu)
       Status: Triaged => Fix Released

-- 
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https://bugs.launchpad.net/bugs/1293944

Title:
  [regression] Mir deb packages with versioned names cannot be installed
  simultaneously any more

Status in Mir:
  Fix Released
Status in Mir 0.6 series:
  Won't Fix
Status in “mir” package in Ubuntu:
  Fix Released
Status in “mir” package in Ubuntu RTM:
  Fix Released

Bug description:
  Mir has some packages with ABI-versioned names (libmirserver17,
  libmirclient7) so that multiple versions can be installed
  simultaneously, in theory. However this plan is not working;

  Package: libmirserver17
  Section: libs
  Architecture: i386 amd64 armhf arm64
  Multi-Arch: same
  Pre-Depends: ${misc:Pre-Depends}
  Depends: ${misc:Depends},
           ${shlibs:Depends},
           libmirplatform (= ${binary:Version}),
           libmirplatformgraphics-mesa (= ${binary:Version}) |
             libmirplatformgraphics-android (= ${binary:Version}),

  When we bump an ABI number, we also increase the ${binary:Version}. So
  you can see from the names that libmirplatform* can only have one
  version installed at a time. And that indirectly means that
  libmirserverN can never be installed simultaneously with
  libmirserverN+1.

  This also leads to annoying CI failures as we're seeing this week:

  The following packages have unmet dependencies:
   libmirserver16 : Depends: libmirplatform (= 0.1.6+14.04.20140310-0ubuntu1) but 0.1.7+autopilot0 is to be installed
                    Depends: libmirplatformgraphics-mesa (= 0.1.6+14.04.20140310-0ubuntu1) but 0.1.7+autopilot0 is to be installed or
                             libmirplatformgraphics-android (= 0.1.6+14.04.20140310-0ubuntu1) but 0.1.7+autopilot0 is to be installed
  E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

  There are at least two possible solutions I can think of so far:

  (1) Change our Depends' to not use straight equality. So we must change:
     libmirplatform (= ${binary:Version}),
  to:
     libmirplatform (>= ${binary:Version}),
  or even to
     libmirplatform (>= some_older_version_based_on_real_requirements),

  (2) Change libplatform* to include some ABI number in their names. Not
  ideal.

  I like (1).

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