When Shutting down or hibernating it just goes to the login screen

Question

There is a input form, end user can register as a regular user. off course the attacker can also write a script to input the form with spam data. Besides a captcha verfication, is there any other method to prevent from attacking?

Thanks in advance!

Solution 1

Used to have the same problem, run this on a terminal:

sudo poweroff

The problem get fixed by itself after several times i had to do that.

Also check if theres a .Xauthority file in your home folder owned by root.
Log in a text console (Alt+Ctrl+F1) at the login screen, and then run

sudo rm ~/.Xauthority

Hope it helps. (:

Solution 2

This is a known problem. Here is the associated bug report:

https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/838792

Comments

[Jorge Castro]

Welcome to Ask Ubuntu! We need more hardware information to help you, can you look at this question and then edit your question adding the information?

[Rocket101]

Thanks! I will see if this works. Also, is it safe to do the terminal command even if you do not see that file, and do you mean do the sudo power off command when I have the problem, or run it several times in a row.

[iLQ]

1. Yes it is Safe, if the file doesn't exists, it will show you a message like "the file doesn't exist" or something like that. 2. I mean do the sudo poweroff command when you have the problem only once (It will be enough)

[Salvatorelab]

it didn't work for me, the file exists, but removing it didn't change anything.