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Thread: interrupting boot and escaping to text mode ?

  1. #1
    Join Date
    Oct 2012
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    3

    interrupting boot and escaping to text mode ?

    HI all,

    I was busy allowing my raspi to use the X11 on my desktop ubuntu (12.04), using some instructions on the web.
    <from memory> I edited /etc/gdm/lightdm.conf, and /etc/x11/<someconffile>
    but not the /etc/gdm/gdm.schema, which is probably what is causing the trouble.

    after a reboot, I now find that logging on acts normally, I boot, I get bios screen, no grub(as always), I get the graphic login screen, type my password. then the screen briefly gets black and the logon screen returns.

    the guest session cannot sudo (why ?), ssh from the network is refused (probably still default). using a boot-cd I cannot change the data on the disk

    So, I'm locked out. this post is from the guest account

    I'm sure there is a way to interrupt the boot sequence and prevent getting into graphic mode but I do not know it.
    Can anybody point me to some documentation or hand me the right words to google on ? I have found nothing helpful using the words I could imagine.

    Thanks a lot !

    Regards,
    Ronald van Aalst

  2. #2
    Join Date
    Apr 2012
    Beans
    5,157

    Re: interrupting boot and escaping to text mode ?

    Quote Originally Posted by raalst View Post
    after a reboot, I now find that logging on acts normally, I boot, I get bios screen, no grub(as always), I get the graphic login screen, type my password. then the screen briefly gets black and the logon screen returns.
    Sounds like your X session is failing to start - you can check your ~/.xsession-errors file, also often worth checking the ownership / permissions on your ~/.Xauthority and ~/.ICEauthority files (should be user:user and mode 600)

    Quote Originally Posted by raalst View Post
    the guest session cannot sudo (why ?), ssh from the network is refused (probably still default). using a boot-cd I cannot change the data on the disk
    The guest account cannot sudo because 'guest' is not a member of the sudo group (for obvious reasons). An SSH server is not installed by default in the desktop editions. To fix things via the recovery console you will likely need to remount the filesystem with read-write permissions:

    Code:
    # mount -o remount,rw /
    You should also be able to login to a virtual terminal (Ctrl-Alt-F1 etc.) and fix things from there.

  3. #3
    Join Date
    Oct 2012
    Beans
    3

    Re: interrupting boot and escaping to text mode ?

    I was looking and hoping for that last sentence !

    CTRL-ALT-F1, let's see...

  4. #4
    Join Date
    Oct 2012
    Beans
    3

    Re: interrupting boot and escaping to text mode ?

    Yep, CTRL ALT F1 gave me a working (text) logon again, with root/sudo privileges.

    The problem proper seems to be linked to my NVIDIA graphics card. but
    I can now at least do something about it again.

    THANKS !

    Regards,
    Ronald

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