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Thread: can not log in after update

  1. #1
    Join Date
    Jan 2006
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    Australia
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    Ubuntu 10.04 Lucid Lynx

    Question can not log in after update

    Hi
    I am typing this on my phone because I upgraded earlier today after being prompted to and now I cannot login.

    only 1 of my monitors is working and the background is low resolution, with a large login prompt in the middle.
    It will not accept my password and I'm sure I'm typing it correctly because it's a very simple one.

    When i type in the password it flashes and flickers a bit and then goes back to the same place again.

    Please help, I have work to do later tonight and I really don't know what I'm doing or what to do next...

  2. #2
    Join Date
    Apr 2009
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    UK Lake District
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    Ubuntu 14.04 Trusty Tahr

    Re: help!!! - can not log in after update

    At the grub menu
    Select the Advanced options, then select the previous kernel option
    Does it boot?
    Ubuntu Member Always something different. Promoting Ubuntu and System 76 at TUXPC

  3. #3
    Join Date
    May 2012
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    UK
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    Re: help!!! - can not log in after update

    if possible can you hold the shift key while booting the computer until grub menu shows, then select previous kernel number and press enter key to boot.

    if its back to normal, install grub customizer from ppa, and choose that kernel for your bootable system.

    if you cant get it to work, and have ubuntu or another 'live' linux cd/dvd/usb stick, boot that to do your work and get files from hard drive for now.

  4. #4
    Join Date
    Jan 2006
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    Australia
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    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: help!!! - can not log in after update

    OK,
    Thanks for the replies so far.

    I've got it to boot into recovery mode, and it will accept my normal password and gets me a command prompt.
    I've tried several of the other options (from the grub menu) but none of the non-recovery ones will let me log in.

    How do I get from the command prompt to the normal graphical interface again?
    When I had trouble in the past after upgrading I had to do something with the nvidia setup, but in this case I can't even get in...

  5. #5
    Join Date
    Mar 2013
    Location
    Southwest USA
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    53
    Distro
    Ubuntu

    Re: help!!! - can not log in after update

    From: http://askubuntu.com/questions/31849...-restart-unity
    (this assumes the update is to 12.04 or higher)
    First choice
    Code:
    unity
    Second choice
    Code:
    unity --replace &
    Third choice:
    Code:
    killall -u USR1 -r -g unity*

  6. #6
    Join Date
    Jan 2006
    Location
    Australia
    Beans
    111
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: help!!! - can not log in after update

    Hi,
    Didn't get too far with those unfortunately.

    First
    WARNING: no DISPLAY variable set, setting it to :0
    unity-panel-service: no process found
    compiz (core) - Fatal: Couldn't open display :0


    Second
    Warn: Unknown option '-'

    Third
    Cannot find user USR1

    There's other bits, but this is painful typing it all out on my phone. I think I've given the jist of it.

  7. #7
    Join Date
    May 2012
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    UK
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    614

    Re: help!!! - can not log in after update

    i didn't realise this was an upgrade of versions.

    what are the basic computer specs? processor and ram. maybe it can't cope with the new system.

    if you had proprietary graphics driver inatalled, i think its meant to be removed before an upgrade.

    you have a setup of more than one monitor, which pobably complicated things.

    you could try:

    sudo apt-get install ubuntu-desktop

    or

    sudo apt-get install lxde

    from recovery mode. choose network option in recovery menu, then drop to shell option.

  8. #8
    Join Date
    Mar 2013
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    Southwest USA
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    Distro
    Ubuntu

    Re: help!!! - can not log in after update

    I think black veils idea is best if you are in a hurry

    Install this desktop and do whatever you need to do:
    Code:
    sudo apt-get install lxde
    You can fix the rest later.

  9. #9
    Join Date
    Jan 2006
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    Australia
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    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: help!!! - can not log in after update

    No, I didn't realise it was a version upgrade either.

    There's nothing special about the computer, it's about 4 years old or so. Quad core, 4G ram, geforce gtx450 video card.

    There was no message about removing anything, it was just the usual "updates available" that pops up every now and then.


    I've tried that install ubuntu-desktop - it did a bunch of stuff but did not throw up any errors.
    After rebooting, still the same unfortunately.

  10. #10
    Join Date
    Jan 2006
    Location
    Australia
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    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: help!!! - can not log in after update

    Ok, have tried the lxde one too now, still the same can not log in.

    Logging in on the command line with exactly the same username and password works.
    <shrug>
    ???

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