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Thread: Unable to logon to main user in LightDM after changing graphics drivers

  1. #1
    Join Date
    Oct 2010
    Location
    Stellenbosch, RSA
    Beans
    5
    Distro
    Ubuntu 10.04 Lucid Lynx

    Angry Unable to logon to main user in LightDM after changing graphics drivers

    Hi All. I've found a few similar threads, but nothing quite like my own. I'll try to be as specific as possible:

    After installing proprietary drivers from ATIs website to replace the proprietary drivers I had installed from the "Additional Drivers" menu, I was unable to login at all after rebooting. After searching a few forums I changed the xorg.conf "Driver" entry in the "Device" section from "fglrx" to "radeon".

    This solved my initial problem... I could now login. This is when the actual problem started: I decided to try to remove the proprietary drivers completely and get "full" support from the ATI open source drivers. After following some commands on forums and rebooting, I was able to reach lighDM, but not able to login! After entering my password it would briefly switch to a black screen and then return to lightDM, once again requesting a password. I was able to login from the terminal using Ctrl-Alt-F1. Tried to get help, but to no avail... I managed to create a new user account (using the Ctrl-Alt-F1 terminal) from which I am able to login, but I still can't login to my main account using lightDM!?

    Please help. It would be much appreciated.

    (Running Ubuntu 11.10 on a Toshiba Satellite notebook.)
    Last edited by unobtruse; October 27th, 2011 at 01:44 AM. Reason: spelling

  2. #2
    Join Date
    Oct 2009
    Beans
    26

    Re: Unable to logon to main user in LightDM after changing graphics drivers

    I have a similar issue with a non discrete graphics card, the 5770HD and opened a new thread earlier today.
    http://ubuntuforums.org/showthread.php?t=1870231

    When I boot normally, I get a blank screen and can't even switch to the text based consoles.
    If I go into the grub menu at boot time, select recovery console, then wait for the menu to appear and select Resume normal boot, it works like a charm.

  3. #3
    Join Date
    Oct 2010
    Location
    Stellenbosch, RSA
    Beans
    5
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Unable to logon to main user in LightDM after changing graphics drivers

    Thanks W00ster, I'll check it out.

  4. #4
    Join Date
    Oct 2010
    Location
    Stellenbosch, RSA
    Beans
    5
    Distro
    Ubuntu 10.04 Lucid Lynx

    Thumbs down Re: Unable to logon to main user in LightDM after changing graphics drivers

    I managed to fix my problem by removing the
    Code:
    /home/username/.Xauthorization
    configuration file (where username is my account username). Clearly X got caught up in something in between all the changes I recklessly made.

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