I was afflicted by a version of this problem after updating 12.04 LTS
Precise via the Update Manager on 20/11/2016. The principal problem is
that the icons on the desktop launchpad became invisible, though
hovering over where I suspected that they were with the mouse did result
in a small text banner identifying the application being displayed. Some
colours might not be right also, but the problems are minor compared
with what some people have reported.

I attempted to downgrade manually using advice given here but to no
avail, possibly because I wasn't sure what version of nvidia-304 I'd
been on previously, though I think it was .131. After quite a lot of
fiddling I gave up and reverted to the unsatisfactory 304.132, hoping
that a fix, possibly consisting of a downgrade, would be forthcoming
soon.

I've only just subscribed to e-mails about this bug so apologies if this
question has already been answered but is a fix going to be released,
and if so roughly when? My Ubuntu instance is a secondary machine but I
do use it and like it be working, which it was doing well until the
update.

If it helps my GPU is an NVIDIA GeForce 6200 TurboCache and requires a
304.xx driver, and my CPU is AMD Athlon 64 X2 3800+.

Thanks.

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to nvidia-graphics-drivers-304 in Ubuntu.
https://bugs.launchpad.net/bugs/1639180

Title:
  no login possible after update to nvidia 304.132

Status in nvidia-graphics-drivers-304 package in Ubuntu:
  Confirmed
Status in nvidia-graphics-drivers-legacy-304xx package in Debian:
  Confirmed

Bug description:
  Ubuntu 16.04 LTS

  NVIDIA driver:
  - nvidia-graphics-drivers-304
  - update to version 304.132

  dpkg.log:
  upgrade nvidia-304-updates:amd64 304.131-0ubuntu3 304.132-0ubuntu0.16.04.2

  - reboot
  - lightdm login screen
  - login
  - a few seconds some flickering
  - and the lightdm login screen appears again

  It is not possible to login. Unity is not loading.

  .xsession-errors:
  X Error of failed request:  BadValue (integer parameter out of range for 
operation)
    Major opcode of failed request:  155 (GLX)
    Minor opcode of failed request:  3 (X_GLXCreateContext)
    Value in failed request:  0x0
    Serial number of failed request:  34
    Current serial number in output stream:  35

  See also bug 1634802

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