4

I've tried what's recommended in several of the questions that deal with the "login loop" with none of the solutions working. BTW, I have an nvidia GPU: GTX 1080.

Concretelly I've tried with no results:

  • Copying .Xauthority and .ICEauthority, or changing ownership to the user.
  • Removing and re-instlalling lightdm
  • purging nvidia drivers: sudo apt-get remove --purge nvidia-*, sudo ubuntu-drivers autoinstall, sudo service lightdm restart and reboot

Following this question advice I include the output of .xsession-errors. 

$ cat ~/.xsession-errors
Xlib:  extension "GLX" missing on display ":0".
Xlib:  extension "GLX" missing on display ":0".
openConnection: connect: No such file or directory
cannot connect to brltty at :0
upstart: gnome-session (Unity) main process (3270) terminated with status 1
upstart: unity-settings-daemon main process (3262) killed by TERM signal
upstart: logrotate main process (3118) killed by TERM signal
upstart: bamfdaemon main process (3181) killed by TERM signal
upstart: indicator-bluetooth main process (3320) killed by TERM signal
upstart: indicator-printers main process (3333) killed by TERM signal
upstart: indicator-session main process (3334) killed by TERM signal
upstart: indicator-power main process (3321) killed by TERM signal
upstart: indicator-application main process (3359) killed by TERM signal
upstart: indicator-datetime main process (3325) killed by TERM signal
upstart: unity7 pre-start process (3263) terminated with status 143
upstart: Disconnected from notified D-Bus bus
upstart: indicator-keyboard main process (3328) killed by TERM signal
upstart: unity-panel-service main process (3281) killed by TERM signal
upstart: indicator-sound main process (3332) killed by TERM signal
marbel
  • 171

2 Answers2

4

The problem was basically nvidia drivers screwing up the system so badly that the nvidia re-install didn't work as expected.

They say to diagnose this is by running in the terminal: nvidia-smi which returned. NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver

The solution was basically a full re-install of the OS. So downloading ubuntu 16.04 in a USB drive, re-installing ubuntu.

Then: 

$ sudo apt-get install linux-headers-$(uname -r)
$ sudo apt-get --purge remove nvidia-*
$ sudo apt autoremove

this is the driver for GTX 1080 from: https://developer.nvidia.com/cuda-downloads?target_os=Linux&target_arch=x86_64&target_distro=Ubuntu&target_version=1604&target_type=debnetwork 

$ sudo dpkg -i cuda-repo-ubuntu1604_9.1.85-1_amd64.deb
$ sudo apt-key adv --fetch-keys http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64/7fa2af80.pub
$ sudo apt-get update
$ sudo apt-get install cuda

then reboot and everything works, for now. Thanks nvidia for your trashy software!

Here is the discussion of the topic from nvidia-forum with some extra details.

marbel
  • 171
1

As you are are using an nVidia GTX card try pressing Crtl + Alt + F2, logging in, and then running

sudo apt-get purge nvidia.*

And then rebooting.

If you are using Bumblebee to switch between GPU cards the command should be

sudo apt-get purge nvidia.* bumblebee

Edit: I did get nVidia working with a nVidia driver on 16.04. The only driver I managed to get to work is the nvidia-364, from ubuntu graphics ppa. Here is what I did:

First get purge all existing nVidia drivers with

sudo apt-get purge nvidia*

and the reboot the system.

Then install nvidia-364 from the repository ubuntu graphics ppa

sudo add-apt-repository ppa:graphics-drivers/ppa

sudo apt-get update

sudo apt-get install nvidia-364

Then reboot.

If that doesn't work I would try purging Cuda too.

SteveInBavaria
  • 3,704