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i know that there are many replicas of the same question, but I am stuck with this problem, as many others, with the only difference that my ubuntu is running on a virtual machine.

When i try to login, the system just gives me back the login screen, asking for the password.

I have tried to:

mv .Xauthority .Xauthority.bak

and it did not work.

I upgraded and updated the packages but nothing. I also upgraded the Nvidia drivers as many had problems because of it.

Can someone please help me solving the problem?

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5
  • enouch RAM/HDD space into you VM?
    – damadam
    Jul 9, 2018 at 7:36
  • Yes, I use it for computational purposes and it I guess it has enough of those
    – Giovanni Di Mauro
    Jul 9, 2018 at 7:44
  • Check you have space in your $HOME directory? If you have no space (for use by gui in temporary work files) the login fails, and you return to the login page. Check as @damadam has suggested (using a tty/terminal)
    – guiverc
    Jul 9, 2018 at 7:52
  • I had enough, but to be sure I did sudo apt-get autoremove. Still the problem stays!
    – Giovanni Di Mauro
    Jul 9, 2018 at 8:11
  • But you could login to do update and upgrade... how did you managed that if you can't login? If you do indeed able to login some how, create a new user and see if you can login as the new user. I suspect there something wrong with the user's configuration, not the system itself.
    – Bernard Wei
    Jul 24, 2018 at 21:17

2 Answers 2

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I also had this problem and fixed it by disabling disabling 3D graphics acceleration in Advanced VM settings (i.e. Under Hardware Tab and inside Graphics).

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I tried a bunch of things, but what ended up working for me is updating to version 18.04 through the command line (from login screen with Ctrl+Alt+F1 or Ctrl+Alt+F3).

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