Ubuntu – Resolution issue causing login screen loop

gdm

My ubuntu (version 10.10 I think) is stuck in loop at the login screen. Looks like it could be a resolution issue. – I have an nvidia graphics card (gs 8400). I previously had it connected to a 19" monitor however disconnected mid session and since then the issue has persisted. I tried uninstalling the gdm package and reinstalling and running an apt-get update however the login loop still there.

Is there another way I can reset the resolution settings to fix this looping issue?

I can get into the desktop by going through the rescue mode and using startx but its not a solution.

Best Answer

You can edit /etc/X11/xorg.conf by hand

Or you can use nvidia xconfig if you have the proprietary driver sudo nvidia-xconfig

Or sudo dpkg-reconfigure -phigh xserver-xorg

ref: http://doc.ubuntu-fr.org/xorg

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Ubuntu – Login crash loop

The answer was COMPLETELY unrelated:

I put a function in my /etc/profile for quickly setting proxy settings:

function proxy(){
echo -n "username:"
read -e username
echo -n "password:"
read -es password
export http_proxy="http://$username:$password@proxy: port/"
export ftp_proxy="http://$username:$password@proxy: port/"
echo -n "\nDone."
}

Problem is, /etc/profile is interpreted by dash (/bin/sh), not bash, like I had guessed (it sorta being the default and all). So dash was trying to read function proxy(), but the ( was unexpected, and causing a fatal error - crashing ANY graphic login attempt.

These errors didn't show up when logging in non-graphically, making it VERY hard to discover.

Moral of the story: check your ~/.xsession-errors file.

For clarification:

If you can't login graphically, press 'Ctrl+Alt+F1' to reach a non-gui shell, log in there, and check your ~/.xsession-errors by writing:

cat ~/.xsession-errors

Ubuntu – Ubuntu 18 login loop + startx works

I've run into the same issue and reinstalling lightdm fixed the issue for me:

sudo apt-get install --reinstall lightdm
sudo reboot

Best Answer

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For clarification:

Ubuntu – Ubuntu 18 login loop + startx works

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