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[Bug 1371828] Re: After updating nvidia-common to 1:0.2.91.7, nvidia drivers are no longer in use

 

I think I've the same problem.
Updated yesterday, started my computer this morning and after the boot screen I'm only seeing a blinking cursor on a black screen.
Tought it had something todo with lightdm, but nothing I tried fixed it.

After that I've removed all nvidia packages: sudo apt-get purge nvidia-*
Rebooted, and choose the nvidia-331-updates driver I was using before (via Additional Drivers).
This gave the blinking cursor again. So I've tried the other drivers (nvidia-331, nvidia-304, nvidia-304-updates), but none of these installed correctly. After every reboot I got the failsafe mode from Xorg.

I've also tried to downgrade nvidia-common to 1:0.2.91.4, but this again
caused to fallback in the failsafe mode.

Ps. I'm also missing the nvidia-xconfig command, used it a few days ago.

-- 
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Packages, which is subscribed to nvidia-common in Ubuntu.
https://bugs.launchpad.net/bugs/1371828

Title:
  After updating nvidia-common to 1:0.2.91.7, nvidia drivers are no
  longer in use

Status in “nvidia-common” package in Ubuntu:
  Confirmed

Bug description:
  1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> About Ubuntu
  Description:    Ubuntu 14.04.1 LTS
  Release:        14.04

  2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center
  nvidia-common:
    Installed: 1:0.2.91.7
    Candidate: 1:0.2.91.7
    Version table:
   *** 1:0.2.91.7 0
          500 http://my-mirror/archive-ubuntu/ubuntu/ trusty-updates/universe amd64 Packages
          100 /var/lib/dpkg/status
       1:0.2.91.4 0
          500 http://my-mirror/archive-ubuntu/ubuntu/ trusty/universe amd64 Packages

  3) What you expected to happen
  nVidia binary drivers are used

  4) What happened instead
  nouveau Xorg driver is used, but the nVidia kernel module is loaded.

  I updated this package yesterday but did not reboot.  When I started
  my machine this morning I could only boot into the terminal.
  Xorg.0.log said that the nvidia module did no exist.  After purging
  the nvidia driver and reinstalling, I can now start the machine and
  get into X, but the nouveau driver X driver is in use.

  ldmod shows the nvidia driver loaded:
  ...
  ppdev                  17671  0 
  nvidia              10675249  0 
  snd_hda_codec_hdmi     46368  1 
  ...

  But Xorg.0.log says the Xorg driver could not be found:
  [     9.730] (II) LoadModule: "nvidia"
  [     9.731] (WW) Warning, couldn't open module nvidia
  [     9.731] (II) UnloadModule: "nvidia"
  [     9.731] (II) Unloading nvidia
  [     9.731] (EE) Failed to load module "nvidia" (module does not exist, 0)

  
  The Driver Manager says that I am using the nvidia driver version 331.38, but update-alternatives has the MESA ld.so.conf selected:

  $ sudo update-alternatives --config x86_64-linux-gnu_gl_conf
  There are 3 choices for the alternative x86_64-linux-gnu_gl_conf (providing /etc/ld.so.conf.d/x86_64-linux-gnu_GL.conf).

    Selection    Path                                       Priority   Status
  ------------------------------------------------------------
    0            /usr/lib/nvidia-331/ld.so.conf              8604      auto mode
    1            /usr/lib/nvidia-331-prime/ld.so.conf        8603      manual mode
    2            /usr/lib/nvidia-331/ld.so.conf              8604      manual mode
  * 3            /usr/lib/x86_64-linux-gnu/mesa/ld.so.conf   500       manual mode

  If I select 0 and log out and back in, the nvidia driver is in use,
  but I cannot start Steam.  This select also does not survive a reboot.

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References