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Thread: Cannot install unity-system-compositor

  1. #1
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    Cannot install unity-system-compositor

    Hello!

    I made a fresh installation of Saucy (13.10) a week ago to tryout Mir. From what I have read, Mir is not installed by default so I suppose I'm still on X. I used these instructions for switching to Mir:

    http://www.jonobacon.org/2013/08/15/...-ubuntu-13-10/
    http://linuxg.net/how-to-install-and...cy-salamander/

    Unfortunately, none of these seem to work for me. I only keep getting a version depency error using: "sudo apt-get install unity-system-compositor" or trying the same with Synaptic.

    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:
    unity-system-compositor : Depends: libmirserver1 (= 0.0.10+13.10.20130903-0ubuntu1) but 0.0.10+13.10.20130904-0ubuntu1 is to be installed
    E: Unable to correct problems, you have held broken packages.
    Is it possible to fiddle with it in some way to make it work? Or do I have to wait for further updates?

    Thanks in advance,
    Peter

  2. #2
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    Re: Cannot install unity-system-compositor

    Thread moved to the "Ubuntu +1" forum.

  3. #3
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    ExodusHair<Čubura
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    Re: Cannot install unity-system-compositor

    Two things:

    You might have to wait so that PPA consolidates itself (since You have a candidate that is newer than one desired by package You want to install, that is indicator of sort of transition time that occurs frequently on development PPAs...
    You might try
    Code:
    sudo apt-get dist-upgrade
    but be very carefulll in answering questions and read all questions really slow...

  4. #4
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    Re: Cannot install unity-system-compositor

    Just follow the instructions here ...

    https://wiki.ubuntu.com/Mir/Installing

  5. #5
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    Re: Cannot install unity-system-compositor

    I know who Jono Bacon is but sometimes even the best of us does not always know what they are talking about. Sorry Jono. The guide to follow is this one.

    https://wiki.ubuntu.com/Mir/Installing

    You do not need the demonstrations. You need to run

    Code:
    sudo apt-get update
    Code:
    sudo apt-get dist-upgrade
    Code:
    sudo install unity-system-compositor
    Code:
    sudo restart lightdm
    Your problem may come from not running

    Code:
    sudo apt-get dist-upgrade
    That is like running apt-get upgrade but it is smarter. It fixes issues like the one that you have. Some wrongly think it upgrades to the next version of Ubuntu. Not true. Also, that second link is way out of date. Add the PPA suggested in that link and you will have to purge it to install unity-system-compositor.

    Apparently restarting lightdm is important. And you will not notice any difference. The only way to tell if xmir is loaded is to run some commands. If the command does not report back then you are still on xserver.

    Code:
    grep -i LoadModule /var/log/Xorg.0.log
    [ 20.311] (II) LoadModule: "glx"
    [ 20.328] (II) LoadModule: "xmir"
    [ 20.384] (II) LoadModule: "nvidia"
    [ 20.400] (II) UnloadModule: "nvidia"
    [ 20.400] (II) LoadModule: "nouveau"
    [ 20.400] (II) LoadModule: "vesa"
    Code:
    grep -i xmir /var/log/Xorg.0.log
    [ 20.328] (II) LoadModule: "xmir"
    [ 20.328] (II) Loading /usr/lib/xorg/modules/extensions/libxmir.so
    [ 20.332] (II) Module xmir: vendor="X.Org Foundation"
    [ 20.405] (II) NOUVEAU(0): Output XMIR-0 has no monitor section
    [ 20.405] (II) NOUVEAU(0): Output XMIR-1 has no monitor section
    [ 20.405] (II) NOUVEAU(0): Output XMIR-2 has no monitor section
    [ 20.405] (II) NOUVEAU(0): Printing probed modes for output XMIR-0
    [ 20.405] (II) NOUVEAU(0): EDID for output XMIR-1
    [ 20.405] (II) NOUVEAU(0): EDID for output XMIR-2
    [ 20.405] (II) NOUVEAU(0): Output XMIR-0 connected
    [ 20.405] (II) NOUVEAU(0): Output XMIR-1 disconnected
    [ 20.405] (II) NOUVEAU(0): Output XMIR-2 disconnected
    [ 20.405] (II) NOUVEAU(0): Output XMIR-0 using initial mode 1680x1050
    Code:
    ls -l /var/log/lightdm/unity-system-compositor.log
    -rw------- 1 root root 62 Sep 8 11:29 /var/log/lightdm/unity-system-compositor.log
    Code:
    ps aux | grep unity-system-compositor
    root 1031 0.6 1.7 928812 17908 tty7 Ssl+ 11:29 0:28 /usr/sbin/unity-system-compositor --from-dm-fd 10 --to-dm-fd 13 --vt 7
    graham 3483 0.0 0.0 13652 956 pts/0 S+ 12:36 0:00 grep --color=auto unity-system-compositor
    This is what I get right now from my Saucy+xmir install. Note, none of this will work if we are using a proprietary video drvier.

    Regards.
    Last edited by grahammechanical; September 8th, 2013 at 12:49 PM.
    It is a machine. It is more stupid than we are. It will not stop us from doing stupid things.
    Ubuntu user #33,200. Linux user #530,530


  6. #6
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    Re: Cannot install unity-system-compositor

    ..... and if he has previously followed the linuxg.net instructions he needs to purge the Mir ppa first as described in...

    https://wiki.ubuntu.com/Mir/Installing

  7. #7
    Join Date
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    Re: Cannot install unity-system-compositor

    At Beta 1 level
    Acer Aspire 5253 Radeon 6310
    drivers from .iso, nothing extra
    It's using ati according to LoadModule
    install unity-system-compositor, update, dist upgrade, reboot, ...

    ps aux grep unity-system-compositor shows unity-system-compositor
    so does synaptic
    ps ax shows unity-panel-service
    No mir in Xorg.0.log
    Radeon 6310

    seems to be defaulting to X

    top shows Xorg, not mir nor xmir

    Tried both with/without external monitor same thing. Is there some sort of start command or script or exec missing?

    Thanks....

    BTW, last week I just got black screen unless booting in recovery mode, then screen working pretty crippled.

  8. #8

    Re: Cannot install unity-system-compositor

    Quote Originally Posted by kanton View Post
    Hello!

    Unfortunately, none of these seem to work for me. I only keep getting a version depency error using: "sudo apt-get install unity-system-compositor" or trying the same with Synaptic.



    Is it possible to fiddle with it in some way to make it work? Or do I have to wait for further updates?

    Thanks in advance,
    Peter
    You have proposed repo enabled & only the mir libraries have been updated. So you'll need to wait till unity-system-compositor updates to match that version
    Or disable proposed, remove any libmir packages installed from proposed, (if any), update your sources & try to install u-s-c again

  9. #9
    Join Date
    Aug 2013
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    6

    Re: Cannot install unity-system-compositor

    Hi. I'm trying to get Mir to work, too. I followed the instructions above. I disabled my proprietary drivers (nvida geforce 6200) and rebooted. Now my launcher and panel are not rendering properly, as seen here:

    http://i.imgur.com/lHsSMZ9.jpg

    grep -i LoadModule /var/log/Xorg.0.log
    [ 21.873] (II) LoadModule: "glx"
    [ 21.923] (II) LoadModule: "nvidia"
    [ 21.924] (II) UnloadModule: "nvidia"
    [ 21.924] (II) LoadModule: "nouveau"
    [ 21.936] (II) LoadModule: "vesa"
    [ 21.937] (II) LoadModule: "modesetting"
    [ 21.938] (II) LoadModule: "fbdev"
    [ 21.938] (II) LoadModule: "nvidia"
    [ 21.939] (II) UnloadModule: "nvidia"
    [ 21.939] (II) LoadModule: "nouveau"
    [ 21.939] (II) UnloadModule: "nouveau"
    [ 21.942] (II) LoadModule: "vesa"
    [ 21.944] (II) UnloadModule: "vesa"
    [ 21.944] (II) LoadModule: "modesetting"
    [ 21.945] (II) UnloadModule: "modesetting"
    [ 21.945] (II) LoadModule: "fbdev"
    [ 21.945] (II) UnloadModule: "fbdev"
    [ 21.947] (II) LoadModule: "fbdevhw"
    [ 21.948] (II) LoadModule: "dri2"
    [ 22.284] (II) LoadModule: "fb"
    [ 22.285] (II) LoadModule: "exa"
    [ 22.296] (II) LoadModule: "shadowfb"
    [ 22.301] (II) UnloadModule: "vesa"
    [ 22.301] (II) UnloadModule: "modesetting"
    [ 22.301] (II) UnloadModule: "fbdev"
    [ 23.715] (II) LoadModule: "evdev"

    So obviously I'm still on xserver. Can someone offer assistance?
    Thanks

  10. #10
    Join Date
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    Re: Cannot install unity-system-compositor

    @vaskark2

    Are you willing to try an experiment? Reboot and select Recovery Mode>Resume. When we do that we run on a sub-set of Nouveau called llvmpipe. It is the fall back mode for graphic cards that cannot run Unity 3D. It replaced the Unity 2D that came with 12.04. If the screen effect is the same it will tells us that you are running on llvmpipe and not full Nouveau. Did you active Nouveau in Additional Drivers? Disable proprietary drivers - yes. Activate Nouveau must also be a Yes because at the moment I do not think that xmir will load under llvmpipe.

    Regards.
    It is a machine. It is more stupid than we are. It will not stop us from doing stupid things.
    Ubuntu user #33,200. Linux user #530,530


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