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I'm running Ubuntu 16.04 and have and Nvidia Geforce GTX960 in the laptop. I was getting funny "white rectangles" surrounding the windows, so I figured it was just updating the graphics driver. I dutifully looked up and installed the latest.

Except upon reboot, when it comes up and asks for my password, I get a never ending circle of events. I type in the password, it thinks for a moment, accept my password, goes blank, and then comes back to ask again for my password.

No, the password is correct, because when I do Ctrl+Alt+F1, I can get right in, but still can't get in through the normal GUI.

Juan Antonio
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Mitch Oldroyd
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    Possible duplicate of Ubuntu gets stuck in a login loop – Byte Commander Apr 15 '17 at 19:17
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    And your issue about "white rectangles" is addressed here, make sure you have the very latest nvidia-381 driver from the graphics-drivers PPA: https://askubuntu.com/questions/896221/strange-artifacts-along-window-borders-after-waking-computer-from-sleep-mode – Byte Commander Apr 15 '17 at 19:19
  • So,

    I went to the suggested pages, and it was a bit of a help. However, it took several more attempts and a LOT of reading in the nvidia archives to find the actual issues.

    So, when installing with the code from Nvidia "...run" the script first does a check to find linux-source code, which it subsequently uses to rebuild the driver on the spot. However, reading their "how to" docs very thoroughly, i found that one has to revise the file /etc/x11/xorg.conf so that the "Device" section line identifying the driver says "nvidia" instead of "nouveau" (what mine said).

     – Mitch Oldroyd Apr 23 '17 at 18:03
  • After changing that line, I called upon the sudo apt-add-repository ppa:graphics-drivers sudo apt-get update then when I did the sudo apt-get install nvidia-375 after the install I was able to verify that I am now running nvidia and can now move on to working with Cuda. :) – Mitch Oldroyd Apr 23 '17 at 18:07
  • I'll work with the "white-ish rectangles" around the windows if they return (as that link mentioned that it came from certain nvidia driver versions.

    Thanks again

     – Mitch Oldroyd Apr 23 '17 at 18:09

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