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Zain
Asked: 2018-07-19 08:01:51 +0800 CST

Ubuntu fails to boot fully, stuck in log screen "ppp link was shut down"

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When booting into my Ubuntu 18.04 install after upgrading, I am first faced with a very long boot screen, followed by many messages, the last from GNOME saying something about "the ppp link was shut down".

After switching to tty2 with Alt-F2, I was able to log in but could not enter anything after less than 20 seconds. I was able to regain control by pressing Alt-F7 followed by Alt-F2, but lose it again every 20 seconds.

The journalctl -e showed that gdm3 was restarting every 20 seconds. One of the log entries was ICEAUthFIle exists (or something like it). My system is unusable, how do I fix it?

gnome gui gdm 18.04

1 Answers

  1. Best Answer

    I was able to resolve the issue by doing the following things:

    a) (probably unrelated, so try only if b does not work):

    (dont try before b) sudo apt purge gdm gdm3
sudo apt install gdm3 ubuntu-desktop

    b)

    1) create a folder /var/lib/gdm3/bak (bak just meaning backup, name is arbitrary)

    2) move .ICEauthority .ICEauthority-l and .ICEauthority-c to that folder

    sudo mv /var/lib/gdm3/.ICE* /var/lib/gdm3/bak

    3) wait a bit (up to a minute to be sure). Might have to press alt + f1 or ctrl + alt + f1 if nothing happens.

    Note that I do not know what those files do, they probably contain some configuration (its binary) that would be lost, but the file is recreated by gdm.

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