[Bug 1340800] Re: Precise update-manager 0.156.14.15 breaks Xorg dependencies

[1.618]

By the way, there wasn't 26 broken. there were 69 broken. However,  it
was just aptitude's actions, causing it to go mad.

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Title:
  Precise update-manager 0.156.14.15 breaks Xorg dependencies

Status in “update-manager” package in Ubuntu:
  New

Bug description:
  I was running 12.04.4 LTS x86 with proprietary NVIDIA 304 drivers on a
  Dell Inspiron XPS Gen 2.

  I had modified GRUB2 to try to fix Plymouth, which left me with a low-
  res screen when I removed NVIDIA, so I kept the driver installed.


  In the update manager today, version 0.156.14.15, I got a notification
  at the top saying (I forget what it exactly said) 'Hardware updates
  are available' explaining 'support was ending for...' and that so I
  clicked install and entered sudo password.

  I was expecting just a normal update, nothing big.

  Instead, I got this:

   It removed NVIDIA, and installed Saucy backports for Xorg.

  It has left me with broken dependencies when I ran apt-get, so I
  checked what was wrong in Aptitude.

  According to Aptitude:

   "[1(1)/...] Suggest 26 keeps" 
  The packages listed under "Resolve Dependencies" were:
      xserver-xorg-glamoregl-lts-saucy                                                                                                                 [UNINST]
      xserver-xorg-input-all-lts-saucy                                                                                                                 [UNINST]
      xserver-xorg-input-evdev-lts-saucy                                                                                                               [UNINST]
      xserver-xorg-input-mouse-lts-saucy                                                                                                               [UNINST]
      xserver-xorg-input-synaptics-lts-saucy                                                                                                           [UNINST]
      xserver-xorg-input-vmmouse-lts-saucy                                                                                                             [UNINST]
      xserver-xorg-input-wacom-lts-saucy                                                                                                               [UNINST]
      xserver-xorg-video-all-lts-saucy                                                                                                                 [UNINST]
      xserver-xorg-video-ati-lts-saucy                                                                                                                 [UNINST]
      xserver-xorg-video-cirrus-lts-saucy                                                                                                              [UNINST]
      xserver-xorg-video-fbdev-lts-saucy                                                                                                               [UNINST]
      xserver-xorg-video-mach64-lts-saucy                                                                                                              [UNINST]
      xserver-xorg-video-mga-lts-saucy                                                                                                                 [UNINST]
      xserver-xorg-video-modesetting-lts-saucy                                                                                                         [UNINST]
      xserver-xorg-video-neomagic-lts-saucy                                                                                                            [UNINST]
      xserver-xorg-video-nouveau-lts-saucy                                                                                                             [UNINST]
      xserver-xorg-video-r128-lts-saucy                                                                                                                [UNINST]
      xserver-xorg-video-radeon-lts-saucy                                                                                                              [UNINST]
      xserver-xorg-video-s3-lts-saucy                                                                                                                  [UNINST]
      xserver-xorg-video-savage-lts-saucy                                                                                                              [UNINST]
      xserver-xorg-video-siliconmotion-lts-saucy                                                                                                       [UNINST]
      xserver-xorg-video-sis-lts-saucy                                                                                                                 [UNINST]
      xserver-xorg-video-sisusb-lts-saucy                                                                                                              [UNINST]
      xserver-xorg-video-tdfx-lts-saucy                                                                                                                [UNINST]
      xserver-xorg-video-trident-lts-saucy                                                                                                             [UNINST]
      xserver-xorg-video-vesa-lts-saucy                                                                                                                [UNINST]

  
  which were mostly complaining " 
    -> Remove libegl1-mesa-drivers-lts-trusty [10.1.3-0ubuntu0.1~precise1 (now...)
    -> Cancel the installation of xserver-xorg-glamoregl-lts-saucy
  "

  Synaptic and Update Manager are not complaining about anything.

  I do not know why it installed Saucy backports, when I had (some)
  Trusty versions installed.

  I do not know what to do. I am also stuck with 1280x1024 forced screen
  resolution and 77Hz refresh rate, no other option (according to
  LXRandr), thanks to my GRUB tweaking. (I have 1920x1200 resolution)

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