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["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Simone Scalabrino, thank you for reporting this bug to Ubuntu. Saucy reached EOL on July 17, 2014.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases

If this is reproducible in a supported release, please file a new
report.

** Changed in: xserver-xorg-video-intel (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1268938

Title:
  Banding/dithering problem on Intel HD 4000

Status in xserver-xorg-video-intel package in Ubuntu:
  Invalid

Bug description:
  I'm running Ubuntu 13.04 on a Dell XPS 14 with integrated Intel HD
  4000. The problem is that the coloring si really bad (in gradients,
  for example, bands of colors can be distinguished). It's like the
  color depth is not really 24bit.

  This issue is known, and Intel never fixed it in Windows drivers
  (https://communities.intel.com/thread/29420?start=0&tstart=0).

  I searched and the problem is probably due to HDMI different color
  range (16-235); when it's "scaled" in laptop's display standard
  "0-255" some colors are lost.

  I experienced the same issue in Ubuntu 13.10.

  The package version is 2:2.21.9-0ubuntu0~raring

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