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Thread: How can I break a development release installed on my machine?

  1. #31
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    Re: How can I break a development release installed on my machine?

    So I am going to try and remove :

    Code:
    lightdm-kde-greeter (0.3.2.1-1ubuntu2) ..
    ok.. rebooted and got absolute blackspace. To recover I had to go to terminal and reinstall the lightdm-kde-greeter.

    So.. in summation... although Unity 3D and Ubuntu in general is still operative, the original lightdm ubuntu greeter has been wiped, replaced, supplanted or overwritten and this in a sense is a mild form of breakage that will take a lot of cli codeing to fix& clean or even require a fresh install.

    Regards..
    Last edited by ventrical; September 24th, 2013 at 05:06 PM.
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  2. #32
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    Re: How can I break a development release installed on my machine?

    Gee.. this goes all the way back to 2005.

    http://ubuntuforums.org/showthread.p...325#post526325

    ..
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  3. #33
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    Re: How can I break a development release installed on my machine?

    And here is how I fixed it.

    lightdm.conf

    [SeatDefaults]
    user-session=unity-greeter
    #user-session=kde-plasma
    #greeter-session=lightdm-kde-greeter
    type=unity


    Notice where the KDE Plasma DE *inserted* it's code into lightdm.conf. I never thought such a seemingly obscure little file would be given so much control, especially during the boot-up log on process.

    So I would assume that if an end_user were to try a DE from the repos that they could pin or make read only the lightdm.cong file, despite global permissions during install.

    What cornundrum would this be then?

    edit... it just occured to me that most likely many seemingly irrecoverable installs could just basically be somthing that was injected into lightdm.conf and that this file should be checked out before crefloing (scrapping) a system, but if a beta tester wants to emulate a busted system then they could start right there at lightdm.conf.
    Last edited by ventrical; September 24th, 2013 at 06:35 PM.
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  4. #34
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    Re: How can I break a development release installed on my machine?

    And the reason this is important for noobs is that all of the various flavors are in the Software Center and so Jane or John Enduser may install out of curiosity without being able to recover.
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  5. #35
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    Re: How can I break a development release installed on my machine?

    The benifit of keeping the unity-greeter in the lightdm.conf file is that you can create another user and then logon to a KDE plasma session under that user and then switch back to your regular account with Unity (if that is your choice) and there are no borkfunkles to be contended with. So in this sesne it is not really a bug. I think it is just a matter of practice to understand the learning curves involved in attempting to understand the log in process and lighdm and the configuration files and how they all work together - so basically, my previous assumption was wrong but for a new user it becomes a difficult discovery process.

    Regards..
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  6. #36
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    Re: How can I break a development release installed on my machine?

    I think what we are seeing from one particular flavour is territorial ambition. Rather like the Russians planting a flag on the seabed under the polar ice cap. Of course it could simply be taking the easy option of packaging the whole DE instead of separating the user interface and packaging that.

    Another script that you might want to look into is /etc/X11/default-display-manager.

    On Ubuntu Gnome it read

    /usr/sbin/gdm
    but when I installed lightdm it was changed to

    /usr/sbin/lightdm
    Just to complicate things further on Lubuntu /etc/lightdm/lightdm.conf says

    greeter-session=lightdm-gtk-greeter
    user-session=Lubuntu
    And on Xubuntu it says

    greeter-session=lighdm-gtk-greeter
    user-session=xubuntu
    Ubuntu 12.04 has

    greeter-session=unity-greeter
    user-session=ubuntu
    But saucy does not have /etc/lightdm/lighdm.conf It has /etc/lightdm/lightdm.conf.d/ and in that folder we find

    10-ubuntu.conf; 10-unity-system-compositor.conf; 50-greeter-wrapper.conf; 50-ubuntu.conf; 50-unity-greeter.conf; 50-xserver-command.conf. This is with unity-system-compositor installed. I think that the numbering system is similar to that of Grub. It indicates the priority in which scripts are run.

    Although I think it would be interesting if Ubuntu Gnome could be run on xmir, either by patching gdm to load xmir and xserver, or by modifying the lighdm login screen to look like the Ubuntu Gnome login screen, I am starting to think that it is irrelevant because Mir is coming. I think that summer 2014 will be the 'makeup or break up' time for the flavours.

    Regards.
    Last edited by grahammechanical; September 25th, 2013 at 01:03 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


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